#1,001	Answer: B
Burns that cause the skin to form blisters only are referred to
as:
A first-degree burn.
B second-degree burn.
C third-degree burn.
D none of these.
E
#1,002	Answer: B
Which light wavelengths are most harmful?
A visible and infrared
B ultraviolet
C infrared
D visible and ultraviolet
E
#1,003	Answer: B
What might happen if the gasket is not correctly installed on an
arc welding lens assembly?
A The lens assembly might fall out.
B A welder's eyes may be subjected to ultraviolet light.
C The lenses will be come dirty more quickly.
D Welding smoke may get into the helmet.
E
#1,004	Answer: C
Very small cracks in a welding lens can be found by which one of
the following procedures?
A washing the lens in water
B welding and watching for bright light spots
C twisting the lens between your fingers
D Small cracks are not a problem and need not be found.
E
#1,005	Answer: D
Fatal electrical shock is possible with voltages as low as:
A 460.
B 220
C 110.
D 80.
E
#1,006	Answer: A
Clothing worn in the welding shop should be:
A 100% wool or 100% cotton.
B 100% polyester or 100% nylon.
C 25% cotton and 75% rayon.
D 35% polyester and 65% rayon.
E
#1,007	Answer: A
Why should the top button of a welder's shirt always be buttoned?
A to prevent throat burns
B so that the welder is neatly dressed
C to reduce the change of the shirt being caught in the
equipment
D to keep the shirt from catching on fire
E
#1,008	Answer: C
The haze in welding shops is caused by:
A dust.
B cigarette and pipe smoke.
C decomposed and vaporized fluxes and metals.
D high-speed fans.
E
#1,009	Answer: D
How far must oxygen cylinders be stored from flammable materials?
A 5 ft (1.5 m)
B 10 ft (3 m)
C 16 ft (4.9 m)
D 20 ft (6.1 m)
E
#1,010	Answer: D
A room that is used to store acetylene cylinders must:
A be well lit.
B have a solid steel door.
C be large enough for two workers.
D be located away from halls.
E
#1,011	Answer: C
Where would a person find information about the maximum safe rpm
for a grinding stone?
A on the grinder
B on a chart
C on the blotter on the stone
D The rpm is not important.
E
#1,012	Answer: B
The tool rest on a grinder should be kept adjusted to within
of the face of the stone.
A 1/4 in. (6 mm)
B 1/16 in. (2 mm)
C 3/8 in. (10 mm)
D 1/8 in. (3 mm)
E
#1,013	Answer: C
The first stage of a two-stage regulator reduces the cylinder
pressure to approximately:
A 125 psig (8.7 kg/cm2g).
B 175 psig (12.3 kg/cm2g).
C 225 psig (17.5 kg/cm2g).
D 300 psig (21.0 kg/cm2g).
E
#1,014	Answer: D
What causes the difference in the pressure shown on the working
pressure gauge and the actual pressure at the torch tip?
A line drop
B resistance of the gas as it flows through the hose
C There is no difference in pressure.
D both a and b
E
#1,015	Answer: B
How far from the actual work should regulators be located?
A 25 ft (7.6 m)
B so that flames or sparks cannot reach the regulators
C 10 ft (3 m)
D so that the regulators can be easily reached
E
#1,016	Answer: A
A notched nut indicates:
A left-hand threads.
B that the nut is extra strong.
C right-hand threads.
D that the nut is made of brass.
E
#1,017	Answer: C
Shortening the arc length during a weld:
A increases spatter.
B causes porosity.
C increases the rate of metal transfer.
D reduces penetration.
E
#1,018	Answer: B
As the welding current increases:
A he weld width and buildup increases.
B the weld spatter and width increases.
C the weld penetration and buildup increases.
D the weld width and buildup decreases.
E
#1,019	Answer: A
An arc welding electrode that is discolored after a weld is
completed indicates that the:
A amperage was set too high.
B arc length was too short.
C rod angle was too steep.
D metal was too thick.
E
#1,020	Answer: C
As the welding arc length increases:
A spatter increases and penetration increases.
B penetration increases and arc control decreases.
C spatter increases and penetration decreases.
D joint tracking is easier because the welder can see better and
the arc length has no effect on weld quality.
E
#1,021	Answer: B
A leading electrode angle will cause:
A deeper penetration.
B a wider weld bead.
C faster travel speed.
D more spatter.
E
#1,022	Answer: A
As the electrode angle changes from a leading angle to a trailing
angle, what happens to the weld?
A penetration increases and width decreases
B buildup decreases and width increases
C spatter decreases and penetration increases
D slag removal becomes easier
E
#1,023	Answer: B
Which weave pattern works well on a vertical lap joint?
A square
B "T"
C circular
D figure 8
E
#1,024	Answer: C
Most square butt joints have a root opening range from:
A 1/16 in. (2 mm) to 1/8 in. (3 mm).
B 1/8 in. (3 mm) to 1/4 in. (6 mm).
C 0 in. (0 mm) to 1/8 in. (3 mm).
D 1/8 in. (3 mm) to 3/16 in. (4.8 mm).
E
#1,025	Answer: B
A leading electrode angle will cause:
A deeper penetration.
B a wider weld bead.
C faster travel speed.
D more spatter
E
#1,026	Answer: B
Combination welding and cutting torches are most often used:
A to cut thick material.
B by schools and small welding shops.
C by steel mills.
D both a and c
E
#1,027	Answer: C
When bleeding the pressure from a system, it should be done:
A very slowly.
B very quickly.
C by opening only one valve at a time.
D by opening both valves at the same time.
E
#1,028	Answer: B
If two hoses must be taped together, they should be taped every:
A 8 in. (203 mm).
B 12 in. (305 mm).
C 18 in. (457 mm).
D 25 in. (610 mm).
E
#1,029	Answer: C
Oxygen and acetylene hoses must always be color coded in which
one of the following ways?
A oxygen green, acetylene black or red
B oxygen green or black, acetylene red
C oxygen green, acetylene red
D oxygen green or black, acetylene red or black
E
#1,030	Answer: A
Why is the pressure bled off a regulator and the adjusting screw
backed out?
A to prevent the diaphragm from stretching
B to prevent regulator creep
C to reduce the possibility of torch damage
D to stop unauthorized use of the equipment
E
#1,031	Answer: C
Why are newly assembled hoses purged before they are used for the
first time?
A to get fresh gas in the lines
B so that the torch lights quickly
C to remove air from the lines
D to remove soot from the tip
E
#1,032	Answer: D
How should a welding tip be tightened?
A with a wrench
B with pliers
C by hand only
D as recommended in the owner's manual
E
#1,033	Answer: D
Turning the fuel valve off slowly may cause the torch to:
A overheat.
B pop.
C make a whistling sound.
D flashback.
E
#1,034	Answer: A
Oil must never be used on a regulator because it could:
A cause a fire or explosion.
B contaminate the gas.
C clog small internal openings.
D both a and b
E
#1,035	Answer: C
The haze in welding shops is caused by:
A dust.
B cigarette and pipe smoke.
C decomposed and vaporized fluxes and metals.
D high-speed fans.
E
#1,036	Answer: D
How far must oxygen cylinders be stored from flammable materials?
A 5 ft (1.5 m)
B 10 ft (3 m)
C 16 ft (4.9 m)
D 20 ft (6.1 m)
E
#1,037	Answer: D
A room that is used to store acetylene cylinders must:
A be well lit.
B have a solid steel door.
C be large enough for two workers.
D be located away from halls.
E
#1,038	Answer: A
What can be used to free an acetylene cylinder that has been
frozen to the ground?
A warm water
B hot air
C propane torch
D Nothing can be used safely to free acetylene cylinder.
E
#1,039	Answer: A
How long must an acetylene cylinder that has been lying on its
side be set vertically before it is used?
A 15 minutes
B 60 minutes
C 10 minutes
D 30 minutes
E
#1,040	Answer: D
When is it necessary in a weld shop to have a fire watch?
A when a person is welding outdoors
B if a person cannot see the nearest fire extinguisher
C when sparks are traveling more than 15 ft (4.6 m)
D when welding within 35 ft (10.7 m) of combustible materials
E
#1,041	Answer: C
What type of fire extinguisher is used on electrical fires?
A type A
B type B
C type C
D type D
E
#1,042	Answer: A
When using a fire extinguisher on a fire, it should be:
A pointed at the base of the fire.
B moved up and down to cool the flame.
C pointed at the top of the fire.
D held very close to the flames.
E
#1,043	Answer: A
At what approximate temperature can an oxygen cut first be
started?
A 1,600 deg. F (870 C)
B 2,800 deg. F (1,536 C)
C 1,450 deg. F (787 C)
D 1,275 deg. F (690 C)
E
#1,044	Answer: D
What will happen if acetylene is used in a two-piece cutting tip?
A The tip may backfire.
B The tip may overheat.
C The tip may explode.
D All of these may occur.
E
#1,045	Answer: D
Before making a cut with a hand torch, welders should:
A steady themselves.
B check to be sure that they have freedom of movement with the
torch along the line to be cut.
C practice the cutting movement.
D do all of these.
E
#1,046	Answer: A
During a cut, how close should the inner flame cone be kept to
the surface of the plate?
A 1/8 in. (3 mm) to 3/8 in. (10 mm)
B 1/4 in. (6 mm) to 3/8 in. (10 mm)
C touching the plate to l/8 in. (3 mm)
D 1/8 in. (10 mm) to l/2 in. (13 mm)
E
#1,047	Answer: A
Cutting with a slight angle toward the scrap side of the cut:
A places most of the slag on the scrap side.
B helps the cut proceed more quickly.
C keeps the torch from popping.
D reduces the width of the kerf.
E
#1,048	Answer: A
When cutting dirty plate, a welder needs:
A more preheat.
B a short coupling distance.
C more fuel gas pressure.
D a fast travel speed.
E
#1,049	Answer: B
Excessive cutting oxygen pressures can cause:
A the cut to be made faster than normal.
B the cut to have excessive slag left on the back of the cut.
C the plate to be distorted.
D the cut to be smoother than it would be at a normal pressure.
E
#1,050	Answer: C
Hard slag contains how much unoxidized iron?
A 20%
B 5%
C 40%
D 10%
E
#1,051	Answer: B
SMAW can be used on approximately what thickness range of
materials?
A 1/8 in. (3 mm) to 1 in. (25 mm)
B 1/16 in. (2 mm) to several feet thick
C 1/4 in.(6 mm) to 3 ft (1 m)
D 1/8 in. (3 mm) to 1/2 in. (13 mm)
E
#1,052	Answer: C
Arc blow can be controlled by using:
A DCEN.
B DCEP.
C ac.
D a short electrode.
E
#1,053	Answer: D
A transformer uses what type of power to produce welding current?
A ac or dc
B ac, DCEN, or DCEP
C dc only
D ac only
E
#1,054	Answer: C
Which type of welding power producing equipment is the most
energy efficient?
A generator type
B alternator type
C invertor type
D rectifier type
E
#1,055	Answer: A
An alternator produced what form of welding current?
A ac only
B ac and dc
C dc only
D dc, but with adjustments in rotating speed, ac can be produced
E
#1,056	Answer: B
In welding, a series of rectifiers is used for what purpose?
A to control output voltage
B to provide dc current from ac current
C to prevent arc blow
D to increase welding speed
E
#1,057	Answer: C
What is meant by the term "duty cycle".
A the purposes for which a machine can be used
B a typical work cycle on a part
C the percentage of time a machine can be used continuously
D the types of welds a machine can perform during a duty cycle
E
#1,058	Answer: C
A splice can be no closer than to the electrode holder.
A 5 ft. (1.5 m)
B 8 ft. (2.4 m)
C 10 ft. (3 m)
D 2 ft. (0.6 m)
E
#1,059	Answer: D
The most widely used numbering and lettering system used to
identify filler metals was developed by:
A ASME.
B ASTM.
C the national government.
D AWS.
E
#1,060	Answer: D
General information regarding a filler metal may include:
A joint design.
B welding current.
C welding position.
D All of the above are correct.
E
#1,061	Answer: C
Load in psi required to break a test specimen is known as:
A yield point.
B charpy V notch.
C tensile strength.
D Both a and c are correct.
E
#1,062	Answer: D
Before selecting a shielded metal arc welding electrode, the
welder must consider:
A type of metal.
B type of joint.
C preheating requirements.
D All of the above are correct.
E
#1,063	Answer: D
The number 60 in the AWS classification E6011 indicates:
A the minimum tensile strength of a good weld made with this
electrode.
B the diameter of the electrode.
C that a weld with the strength of 60,000 psi can be made with
this electrode.
D Both A and C are correct.
E
#1,064	Answer: D
A welding electrode, having a 1/8-in. (3-mm) diameter, that can
be used in any position is:
A E7018.
B E6010.
C E11018.
D All of the above are correct.
E
#1,065	Answer: A
An electrode with a deep penetrating forceful arc would be:
A E6010.
B E6013.
C E7018.
D E6012.
E
#1,066	Answer: C
The major difference between E6010 and E6011 electrodes is:
A E6010 can be used in any position, and E6011 cannot.
B E6011 has less arc stabilizers than does E6010.
C E6011 can be used with both ac and dc welding power, and
E6010 cannot.
D Both A and C are correct.
E
#1,067	Answer: C
The welding electrode that produces welds with little penetration
for easier welding on thin sections is:
A E6011.
B E7018.
C E6013.
D E11018.
E
#1,068	Answer: B
Weld design, welding processes, labor, and overhead are part of
what factor?
A weld strength
B production cost
C welding time
D welding process
E
#1,069	Answer: A
If a weld's groove angle is decreases slightly,:
A less filler metal is required, and costs can be lower.
B a lower amperage setting can be used.
C the root face must be made larger.
D a smaller root gap is needed.
E
#1,070	Answer: B
Square, bevel, and double-bevel are all:
A types of joints.
B edge preparations.
C joint dimensions.
D All of the above are correct.
E
#1,071	Answer: D
To make a 2G weld the plate will be mounted:
A vertically.
B flat.
C overhead.
D horizontally
E
#1,072	Answer: A
A correctly sized weld should be approximately:
A the same size as the metal is thick.
B twice the thickness of the metal.
C equal to 1 1/2 times the joint depth.
D 1 l/2 times the electrode size.
E
#1,073	Answer: D
Welds that are oversized:
A add strength to the weldment.
B are better than too undersized welds.
C are less likely to break later.
D can cause the joint to fail.
E
#1,074	Answer: B
A correctly sized weld will:
A make the joint ridged.
B allow enough joint flexibility to prevent cracking.
C keep the joint stiff and inflexible.
D Both A and C are correct.
E
#1,075	Answer: D
The SMAW process is between         and           deposition
efficient.
A 20% and 45%
B 70% and 95%
C 65% and 80%
D 40% and 60%
E
#1,076	Answer: D
What type of steel is indicated by the AISI and SAE alloy steel
number 40XX?
A carbon
B manganese
C nickel
D molybdenum
E
#1,077	Answer: A
Plain carbon steel is basically an alloy of:
A carbon and iron.
B carbon, silicon, sulfur, manganese, and phosphorus.
C carbon, silicon, and manganese.
D carbon, sulfur, and phosphorus.
E
#1,078	Answer: C
Low-carbon steel contains           or less carbon.
A 1%
B 3%
C 0.3%
D 0.03%
E
#1,079	Answer: D
High-carbon steels have a tendency to be         if
welded without preheating and postheating.
A hard and ductile
B brittle and strong
C ductile and soft
D hard and brittle
E
#1,080	Answer: D
Weldability includes:
A metallurgy of the filler and base metals.
B heat treatments of the weldment.
C joint design.
D All of the above.
E
#1,081	Answer: B
The abbreviation AISI stands for the American Institute of
Steel Inspectors.
A True
B False
C
D
E
#1,082	Answer: B
The meaning of the "1" in the four digit steel number 2140 is:
A .1% carbon content.
B one of the digits used to indicate an alloy series.
C approximately .1% of the major alloying element.
D that it can be welded in all positions.
E
#1,083	Answer: A
Mild steel electrodes that are used to weld high carbon steel
loose some of their normal ductility.
A True
B False
C
D
E
#1,084	Answer: B
An injector gas mixing method:
A uses less oxygen than the mixing chamber method.
B can operate with low-pressure fuel gases.
C can cut through a thick plate.
D is used only on combination torch sets.
E
#1,085	Answer: D
An oxyacetylene cutting torch tip may have more than
preheating holes.
A 4
B 5
C 6
D 8
E
#1,086	Answer: D
Higher preheat flame adjustment is required when:
A cutting thick materials.
B cutting round shapes.
C cutting oily metal.
D All of the above.
E
#1,087	Answer: C
The difference between MPS and propane two-piece tips is that MSP
tips are:
A made from copper, propane tips are made from high conductivity
steel.
B are generally smaller than propane tips.
C not recessed while propane tips are recessed.
D All of the above.
E
#1,088	Answer: A
A tip that is stuck to the cutting head may be removed by
striking the back of the torch head with a hammer.
A True
B False
C
D
E
#1,089	Answer: B
Proper seating of the tip in the torch head is determined by
stopping the end of the tip with a thumb, turning on the
acetylene and sniffing for a leak.
A True
B False
C
D
E
#1,090	Answer: B
The proper procedure for cleaning a cutting tip is to first turn
on a small amount of oxygen, then clean the holes in the tip with
the proper sized cleaning drills and finally file the end of the
tip flat.
A True
B False
C
D
E
#1,091	Answer: B
A slight forward angle of the cutting tip when cutting in a
straight line helps to:
A steady the hand holding the torch.
B blow oxides away from the cut.
C prevent beveling of the cut.
D A and B
E
#1,092	Answer: D
The oxy-fuel process can be used to rapidly cut:
A magnesium.
B titanium.
C iron.
D All of the above.
E
#1,093	Answer: A
"Kindling point" is:
A the minimum temperature at which a metal will burn.
B the maximum temperature necessary to cut metal.
C the melting point of metal.
D the maximum temperature of the torch flame.
E
#1,094	Answer: D
Slag on cuts is due to:
A too long a coupling distance.
B too fast travel speed.
C too little preheat.
D incorrect oxygen pressure.
E
#1,095	Answer: C
The two types of slag produced by oxy-fuel cutting are:
A light slag and heavy slag.
B dense slag and porous slag.
C hard slag and soft slag.
D oxidized and reoxidized slag.
E
#1,096	Answer: D
Group F3 electrodes (E6010 and E6011) produce welds that are:
A wide and have little penetration.
B highly built up and have little spatter.
C narrow and have deep penetration.
D deeply penetrating and have little slag covering.
E
#1,097	Answer: A
If the current is set correctly the end of the electrode should
be discolored between:
A 1/16" and 1/8".
B 1/8" and 3/16".
C 3/16" and 1/4".
D 1/4" and 5/16".
E
#1,098	Answer: D
If an electrode is overheated it will:
A produce too much spatter, but have a stable arc.
B produce a wide, high crowned bead.
C produce a deeply penetrating narrow bead.
D produce an unstable arc because some rod elements will be
burned out.
E
#1,099	Answer: B
A welder can prevent a weld from overheating by using a longer
arc length.
A True
B False
C
D
E
#1,100	Answer: B
Most SMAW welding jobs require an arc length that is between:
A 1/16" to 1/8"
B 1/8" to 3/8"
C 1/8" to 3/16"
D 1/4" to 3/8"
E
#2,001	Answer: C
Equipment is best maintained:
A only as it is necessary.
B every day.
C on a routine schedule.
D by someone other than the welder.
E
#2,002	Answer: B
If a nut is hard to turn, you should:
A pull the wrench toward yourself.
B push the wrench with an open hand.
C push the wrench, holding the wrench tightly.
D use a piece of pipe for better leverage.
E
#2,003	Answer: C
As compared to a 12-point socket wrench, a 6-point socket wrench
is better to use because:
A it fits more easily on a nut.
B it fits in more positions.
C it is less likely to slip.
D it is less expensive.
E
#2,004	Answer: C
Chisels having mushroomed heads must:
A be used with light pressure.
B be used only if a person is wearing safety glasses.
C have the mushroomed head ground off.
D never be used again.
E
#2,005	Answer: C
First degree burns:
A leave the skin, and possibly the tissue below the skin, white
or charred.
B blister, and possibly create breaks in the surface of the
skin.
C make the skin red and painful, but with no breaks in its
surface.
D blister the skin without creating breaks in its surface.
E
#2,006	Answer: A
Third degree burns are treated by:
A applying cool (not iced) water, covering the area with a
sterile, non-fluffy, sterile dressing and calling an
ambulance.
B applying cool water until the pain decreases, then use an
antiseptic ointment and sterile non-fluffy dressing to cover
the burn area.
C apply cool water or, other available cool liquid that can be
drunk, then a sterile non-fluffy bandage and seek medical
help.
D apply cool water until the pain stops then a sterile
non-fluffy bandage.
E
#2,007	Answer: D
Flash burns should be checked by a professional because:
A the welder may not know they have been burned.
B immediate treatment is always required.
C the doctor always knows best.
D of the irritation in the eye the welder can not always tell
whether there is something that may cause infection in their
eye or not.
E
#2,008	Answer: B
Forced ventilation is not always required when welding:
A austenitic manganese
B steel
C copper
D zinc (galvanized metal)
E
#2,009	Answer: A
Argon and carbon dioxide can be hazardous:
A if they displace the air in a confined space where a welder is
working.
B because they can cause fire.
C because they can explode.
D A and B.
E
#2,010	Answer: A
MSDS information:
A specifies how to safely handle hazardous materials.
B specifies possible hazards resulting from use of a product.
is usually kept on record in the shop office.
C
is obtained from OSHA.
D
E
#2,011	Answer: B
least, four places has no cracks and is safe to install.
A True
B False
C
D
E
#2,012	Answer: B
The measure of electrical pressure is called:
A amperes.
B voltage.
C wattage.
D ohms.
E
#2,013	Answer: A
The measure of the total number of electrons flowing in an
electrical circuit is called:
A amperes.
B voltage.
C wattage.
D ohms.
E
#2,014	Answer: C
The measure of the amount of electrical power in a welding
arc is called:
A amperes.
B voltage.
C wattage.
D ohms.
E
#2,015	Answer: D
The purpose of a rectifier is to:
A regulate the amount of current flow.
B dampen electrical surges.
C step down high ac voltage shop current to low welding\
voltages.
D convert alternating current to direct current.
E
#2,016	Answer: A
An electrode holder that heats up when being used may indicate
dirty or loose jaws.
A True
B False
C
D
E
#2,017	Answer: A
Operating voltage is the same as:
A closed circuit voltage.
B short circuited voltage.
C open circuit voltage.
D constant voltage.
E
#2,018	Answer: B
Constant current power is also known as:
A drooping slope.
B constant potential.
C rising arc voltage.
D continuous output voltage.
E
#2,019	Answer: C
The weave pattern that works best on a horizontal butt joint
is the:
A circular pattern.
B "C" pattern.
C "J" pattern.
D "T" pattern.
E
#2,020	Answer: B
Amperage adjustments at the machine should not be made during
welding because current changes during welding usually reduce
weld quality.
A True
B False
C
D
E
#2,021	Answer: A
Welding with a short arc length:
A reduces penetration
B increases penetration
C produces more spatter
D makes a wider and thinner bead.
E
#2,022	Answer: B
Welding with a short arc length produces more heat in the weld
bead.
A True
B False
C
D
E
#2,023	Answer: D
Slag inclusions on a flat butt joint can happen if the welder:
A moves the electrode too fast.
B uses too much amperage.
C moves the electrode too slow.
D uses too short an arc length.
E
#2,024	Answer: A
The figure 8 weave pattern is used for:
A cover passes in the flat and vertical positions.
B cover passes in horizontal and overhead T-joints.
C single pass welds in the flat and vertical positions.
D single pass welds in horizontal and overhead T-joints.
E
#2,025	Answer: A
If when making a vertical weld bead the puddle starts to sag
the welder should:
A increase travel speed.
B increase arc length.
C increase the up angle of the rod.
D reduce the up angle of the rod.
E
#2,026	Answer: A
Most electrical shock in the welding industry results from the
welder contacting:
A bare or poorly insulted conductors.
B electrode holders.
C ungrounded welding machines.
D wet welding cables.
E
#2,027	Answer: A
The workpiece being welded and the frame of electrically powered
machines must both be grounded.
A True
B False
C
D
E
#2,028	Answer: A
Dry wooden boards are adequate to insulate the welder from
potential electrical shock when working on earth surfaces.
A True
B False
C
D
E
#2,029	Answer: D
Flash burns to the eye can result in:
A immediate but temporary pain.
B temporary loss of sight.
C very small areas of bleeding in the retina.
D infection.
E
#2,030	Answer: C
Flash burns result in an injury most like those caused by:
A an electric shock.
B a puncture wound.
C sunburn.
D an abrasive wound.
E
#2,031	Answer: B
The type of light that causes flash burns is:
A infrared.
B ultraviolet.
C high frequency visible light.
D low frequency visible light.
E
#2,032	Answer: B
The hot pass should:
A make a convex weld bead.
B burn out trapped slag.
C ensure deep penetration.
D only be used on open root welds.
E
#2,033	Answer: C
Taking a weld certification test under one agency's
specifications:
A qualifies a person to weld on materials of the same size and
thickness under any other agency's specifications.
B qualifies a person to be a welder for life.
C may help a person to be able to pass other agency's tests that
are similar.
D all of these
E
#2,034	Answer: C
Moving an E7018 electrode too far ahead of the molten weld pool
will:
A allow the molten weld pool size to be controlled.
B make the bead penetration deeper.
C cause porosity.
D help to control the formation of icicles on vertical welds.
E
#2,035	Answer: A
An irregular hot pass surface has what effect on the
acceptability of a weld?
A There is little or no effect on the acceptability of the
completed weld.
B All of the irregular surface must be completely removed
before welding continues.
C c. An irregular surface will prevent the weld from passing
codes or standards.
D d. An irregular surface is a weld defect, and it must be
removed.
E
#2,036	Answer: B
Stringer beads used for the filler pass of a weld should be
overlapped:
A 25%.
B 50%.
C 75%.
D 35%.
E
#2,037	Answer: B
How wide should a cover pass be?
A not more than one-quarter wider than the groove opening
B not more than 1/8 in. (6 mm) wider than the groove opening
C at least 1/4 in. (6 mm) wider than the groove opening
D as wide as possible in order to add strength
E
#2,038	Answer: C
The most frequently required angle for a V-groove is:
A 45 degs.
B 35 degs.
C 60 degs.
D 37 1/2 degs.
E
#2,039	Answer: C
Why are plates 3/8-in. (10-mm) thick or thicker grooved before
welding?
A to prevent distortion
B to control undercut
C to allow for deeper penetration
D both a and c
E
#2,040	Answer: B
The hot pass:
A melts the silicon dioxide (slag) on the root pass and floats
it to the surface of the hot pass bead.
B floats the silicon dioxide (slag) to the surface of the hot
pass by melting the surrounding metal, but not the slag.
C should result in a bead that is convex (crowned in the middle)
so that greater strength can be achieved.
D generally uses the same filler material that is used for the
root pass on high strength open root welds.
E
#2,041	Answer: A
When restarting a weld bead:
A the arc is struck in front of the bead, a long arc is held,
and then slowly reduced as the rod is brought back to the
crater.
B the arc is struck in the crater where a long arc is held until
the rod heats up when a normal arc length can be resumed.
C the arc is struck in front of the bead and quickly returned to
the crater using a normal arc length.
D the arc is struck in the crater, using a short arc length the
rod is then moved in a circle to spread out the weld metal
before moving down the plate.
E
#2,042	Answer: C
A keyhole is:
A a weld defect found in the root pass.
B a weld defect found in the hot pass.
C a hole that precedes the root pass in an open root weld.
D a hole that is left after slag has been burnt out.
E
#2,043	Answer: B
The cover pass should not be more than          wider than the
top of the groove opening.
A 3/16"
B 1/8"
C 1/16"
D The same wide as the top of the groove opening.
E
#2,044	Answer: C
Air carbon arc cutting, unlike oxy-fuel cutting:
A does not require a skilled operator.
B can be done in the flat position only.
C does not require oxygen reactive metals.
D There are no differences.
E
#2,045	Answer: D
The primary purpose(s) of the copper coating on air carbon arc
electrodes is to:
A increase electrical conductivity.
B increase thermal conductivity.
C reduce accidental breakage.
D all of the above
E
#2,046	Answer: C
The power source for air carbon arc cutting must have an open
circuit voltage of, at least,:
A 50 volts
B 32 volts
C 28 volts
D 18 volts
E
#2,047	Answer: B
The air pressure supplied to a air carbon arc torch should be
between             .
A 20 and 60 psi.
B 80 and 100 psi.
C 50 and 150 psi.
D 90 psi or more.
E
#2,048	Answer: C
Air carbon arc gouging is often used to:
A cut out new parts.
B improve part appearance.
C remove old welds.
D cut parts to size.
E
#2,049	Answer: D
Air carbon arc requires that         be removed before work
begins on the part.
A paint
B oil
C rust
D none of the above
E
#2,050	Answer: A
The air carbon arc electrode should extend approximately
inches from the torch when first starting a cut.
A 6
B 4
C 10
D 12
E
#2,051	Answer: B
The most common groove made with air carbon arc gouging is a:
A V-groove.
B U-groove.
C bevel groove.
D J-groove.
E
#2,052	Answer: D
The most widely used numbering and lettering system used to
identify filler metals was developed by:
A ASME.
B ASTM.
C AWS.
D all of these
E
#2,053	Answer: C
Load in psi required to break a test specimen is known as:
A yield point.
B charpy V notch.
C tensile strength.
D Both a and c are correct.
E
#2,054	Answer: A
Elongation is measured as:
A the percentage that a two-inch piece of weld will stretch
before it breaks.
B the amount that a soft metal will stretch before it will not
return to its original shape or length.
C the distance between the arc and the work.
D a distance along the straight along the edge of the work.
E
#2,055	Answer: A
The Charpy V notch test can be used to test metals below room
temperature to test for:
A brittleness.
B hardness.
C ultimate strength.
D None of the above are correct.
E
#2,056	Answer: A
As the percentage of manganese increases in iron, what happens
to the metal's properties?
A Hardness increases.
B Porosity decreases.
C Hot shortness increases.
D abrasive resistance decreases.
E
#2,057	Answer: B
As the percentage of silicon decreases in iron, what happens to
the metals properties?
A Tensile strength increases.
B Resistance to cracking increases.
C Ferrite formation decreases.
D Oxygen levels in the metal decrease.
E
#2,058	Answer: D
Pre-heating is required on iron carbon alloys that have more
than        % CE.
A 40
B 45
C 55
D 60
E
#2,059	Answer: D
The number 70 in the AWS classification E7024 indicates:
A the minimum tensile strength of a good weld made with this
electrode.
B the diameter of the electrode in millimeters.
C that a weld with the strength of 70,000 psi can be made with
this electrode.
D Both A and B are correct.
E
#2,060	Answer: C
A welding electrode, having a 1/8-in. (3-mm) diameter, that can
be used in any position is:
A E7024.
B E10028.
C E9018.
D E7034.
E
#2,061	Answer: A
An electrode with a deep penetrating forceful arc would be:
A E6010.
B E6013.
C E7018.
D E6012.
E
#2,062	Answer: C
The welding electrode that produces welds with little penetration
for easier welding on thin sections is:
A E6011.
B E7018.
C E6013.
D E11018.
E
#2,063	Answer: B
Iron powder is added electrodes to:
A stabilize the arc.
B increase the rate of metal deposit.
C improve slagging properties.
D remove oxides from the molten weld metal.
E
#2,064	Answer: C
Slags with high melting temperatures are used in SMAW electrodes
to:
A remove oxides.
B stabilize the arc.
C hold the molten weld metal in place.
D reduce porosity.
E
#2,065	Answer: B
The "R" in the AWS filler metal classification system means:
A rutile flux.
B rod.
C reduced elongation property metal.
D highly deoxidized for rusted metal.
E
#2,066	Answer: C
The carbon equivalent (CE) is used to determine:
A the amount of carbon in the filler and heat affected zone.
B the amount of carbon and other alloys in the base metal.
C the weldability and procedures required to weld a certain
base metal.
D the total amount of carbon in the weld using a given base
metal and electrode.
E
#2,067	Answer: B
The most frequently used testing method is:
A the guided bend test.
B visual inspection.
C the tensile test.
D destructive testing.
E
#2,068	Answer: A
A major difference between mechanical testing and nondestructive
testing is that most mechanical testing:
A destroys the product being tested.
B can be used only on small test plates.
C is used on metal up to but not more than 3/8 in. (10 mm)
thick.
D is used on metal thicker than 3/8 in. (10 mm).
E
#2,069	Answer: B
Ball-shaped gas pockets trapped in a weld:
A are weld defects.
B are forms of porosity.
C must be removed from the weld and repaired.
D are all of these.
E
#2,070	Answer: D
A deep cylindrical porosity, which comes upward from the root of
the weld is known as:
A uniformly scattered porosity.
B cluster porosity.
C linear porosity.
D piping porosity.
E
#2,071	Answer: B
Inadequate joint penetration is easily located when using which
one of the following nondestructive methods?
A penetrant inspection or magnetic particle inspection
B radiographic inspection or ultrasonic inspection
C visual inspection or eddy current inspection
D penetrant inspection or ultrasonic inspection
E
#2,072	Answer: B
Penetrant testing is an example of destructive testing.
A True
B False
C
D
E
#2,073	Answer: A
A vice and hammer are required to perform the free bend test.
A True
B False
C
D
E
#2,074	Answer: A
The fatigue strength of a metal is measured by:
A the number of cycles of stress to failure and the total
stress used.
B the number of cycles of stress to failure divided by the
thickness of the part.
C the number of cycles of stress to failure divided by the
length of the part.
D the total stress used divided by the cross sectional area.
E
#2,075	Answer: B
A longitudinal weld crack is one that runs:
A across the weld area.
B in the same direction as the weld.
C in the direction the plate was rolled.
D from the toe of the weld into the HAZ.
E
#2,076	Answer: D
Guided bend welded test specimens are rounded in the weld area
before testing to:
A allow for smoother movement though the test fixture.
B to make sure the grind marks are transverse to the weld.
C increase the sensitivity of the test to cracking.
D to reduce the tendency of the specimen to crack.
E
#2,077	Answer: C
Why are codes and standards needed?
A to make good welds
B so all the welds are the same
C so appropriate quality welds can be made
D All of the above are correct.
E
#2,078	Answer: A
A welding code:
A is a detailed listing of rules.
B is a detailed statement of the legal requirements.
C can be used as is without the need for it to be tested.
D All of the above are correct.
E
#2,079	Answer: B
A welding specification:
A is a detailed listing of rules.
B is a detailed statement of the legal requirements.
C can be used as is without the need for it to be tested.
D All of the above are correct.
E
#2,080	Answer: A
In most cases, when should the customer request a copy of the
WPS and the PQR?
A before any welding begins
B before the parts are delivered
C They should be delivered with the parts to ensure that the
welder was qualified to make the weld.
D The customer never receives the WPS or the PQR forms.
E
#2,081	Answer: C
If the WPS test samples do not pass the applicable test then:
A reweld the test and try again.
B try using a different test.
C change the parameters and retest.
D have another welder take the test.
E
#2,082	Answer: D
A welder's qualification will not expire if:
A the welder takes a different test and & fails that test.
B the welder is engaged in the weld's process to the WPS for
that weld.
C all of the welds made according to the WPS pass the test.
D Both B and C are correct.
E
#2,083	Answer: A
Most guided bent tests require:
A 2 root and 2 face bend specimens.
B 2 side and 2 face bend specimens.
C 1 root and 1 face bend specimens.
D 1 root, l face, and l all-weld metal test bend specimen.
E
#2,084	Answer: D
Selecting the correct welding code or standard for a particular
weld is important so that:
A the product will not cost more to fabricate than it should.
B the product will be fabricated to the highest standards
possible.
C the product will be able to stand up to its service
requirements.
D both a and b
E
#2,085	Answer: C
"Qualifying a specification" is done to insure that:
A the welder is qualified to perform the weld.
B the welding tools and machinery is capable of producing a
quality weld.
C the procedure used is capable of producing a quality weld.
D a legal record is available of the qualifications of the
welder.
E
#2,086	Answer: A
The AWS D1.1 code is used to test:
A structural welding.
B pipeline welding.
C pressure vessel welding.
D a and b.
E
#2,087	Answer: B
In austenitic stainless steel, type 18-8 means:
A 18% nickel, 8% chromium.
B 18% chromium, 8% nickel.
C 18% chromium-nickel equivalent, 8% other alloys.
D It is the same number for a stainless steel.
E
#2,088	Answer: B
Carbon in gray cast iron:
A increases weldability.
B reduces ductility.
C raises the melting temperature.
D increases tensile strength.
E
#2,089	Answer: B
White cast iron is:
A easily welded using oxy-fuel.
B practically not weldable.
C best welded using a shielded metal arc.
D welded without preheating.
E
#2,090	Answer: D
A metal is said to have good "weldability" if:
A it can be properly welded with little effort needed to control
the procedures.
B the actual welding is quickly and easily performed to a high
standard.
C many different welding processes can be used to weld it
successfully.
D All of the above are correct.
E
#2,091	Answer: A
When welding metals with poor weldability special controls on
shielding atmospheres, filler metal type and fluxing material may
need to be imposed on the procedure.
A True
B False
C
D
E
#2,092	Answer: C
When welding high carbon steel the problem of developing a hard,
brittle, crack-prone HAZ is solved by:
A welding with a faster travel speed with large rods.
B welding with a slower travel speed with small rods.
C preheating and then welding with a slower travel speed.
D welding with a faster travel speed and then postheating.
E
#2,093	Answer: A
Low carbon steel electrodes are generally used to weld high
carbon steel base metals.
A True
B False
C
D
E
#2,094	Answer: A
The electrode material that is used to weld a high carbon steel
will become harder and more brittle than if it had been used to
weld mild steel.
A True
B False
C
D
E
#2,095	Answer: B
What is the correct procedure for welding tool steels?
A anneal (make the part soft), weld the part at room
temperature, post weld heat treat to restore original
properties.
B anneal, preheat, weld, post weld heat treat to restore
original properties.
C anneal, preheat, weld, air cool.
D anneal, weld the part at room temperature, post weld heat
treat to relieve stress.
E
#2,096	Answer: B
What element does your text say makes tool steel hard to weld?
A tungsten
B carbon
C molybdenum
D silicon
E
#2,097	Answer: A
One procedure used for welding tool steels specifies one or more
layers of weld on the joint's kerf surfaces before welding the
pieces together. This is done to:
A dilute the alloy content of the base metal.
B reduce contraction stresses of the weld.
C reduce welding time.
D reduce brittleness in the HAZ.
E
#2,098	Answer: C
Gray cast iron generally should be welded             mild steel.
A faster than
B the same speed as
C slower than
D a or b is preferred
E
#2,099	Answer: D
Gray cast iron should be preheated from:
A 200 - 400 F.
B 400 - 500 F.
C 500 - 600 F.
D 600 - 900 F.
E
#2,100	Answer: C
When welding gray cast iron the depth of fusion, or penetration,
should be:
A the same as when welding structural materials.
B deeper than when welding structural materials.
C less than when welding structural materials.
D a or b is preferred
E
#2,101	Answer: C
Electrodes that are used to make machinable deposits on gray cast
iron contain:
A mild steel
B chromium
C nickel
D aluminum
E
#3,001	Answer: B
Burns that cause the skin to form blisters only are referred to
as:
A first-degree burn.
B second-degree burn.
C third-degree burn.
D none of these.
E
#3,002	Answer: B
Which light wavelengths are most harmful?
A visible and infrared
B ultraviolet
C infrared
D visible and ultraviolet
E
#3,003	Answer: A
Clothing worn in the welding shop should be:
A 100% wool or 100% cotton.
B 100% polyester or 100% nylon.
C 25% cotton and 75% rayon.
D 35% polyester and 65% rayon.
E
#3,004	Answer: C
The haze in welding shops is caused by:
A dust.
B cigarette and pipe smoke.
C decomposed and vaporized fluxes and metals.
D high-speed fans.
E
#3,005	Answer: D
How far must oxygen cylinders be stored from flammable materials?
A 5 ft (1.5 m)
B 10 ft (3m)
C 16 ft (4.9 m)
D 20ft(6.1m)
E
#3,006	Answer: D
A room that is used to store acetylene cylinders must:
A be well lit.
B have a solid steel door.
C be large enough for two workers.
D be located away from halls.
E
#3,007	Answer: A
What can be used to free an acetylene cylinder that has been
frozen to the ground?
A warm water
B hot air
C propane torch
D Nothing can be used safely to free acetylene cylinder.
E
#3,008	Answer: A
How long must an acetylene cylinder that has been lying on its
side be set vertically before it is used?
A 15 minutes
B 60 minutes
C 10 minutes
D 30 minutes
E
#3,009	Answer: D
When is it necessary in a weld shop to have a fire watch?
A when a person is welding outdoors
B if a person cannot see the nearest fire extinguisher
C when sparks are traveling more than 15 ft (4.6m)
D when welding within 35 ft (10.7m) of combustible materials
E
#3,010	Answer: C
What type of fire extinguisher is used on electrical fires?
A type A
B type B
C type C
D type D
E
#3,011	Answer: A
When using a fire extinguisher on a fire, it should be:
A pointed at the base of the fire.
B moved up and down to cool the flame.
C pointed at the top of the fire.
D held very close to the flames.
E
#3,012	Answer: D
One advantage of a two-stage regulator over a single-stage
regulator is that the two-stage regulator can be used:
A for a larger number of different types of gases.
B with lower pressures and slower flow rates.
C with less chance of exploding.
D on higher flow rates.
E
#3,013	Answer: C
The first stage of a two-stage regulator reduces the cylinder
pressure to approximately:
A 125 psig (8.7 kg/cm2g).
B 175 psig (12.3 kg/cm2g).
C 225 psig (17.5 kg/cm2g).
D 300 psig (21.0 kg/cm2g).
E
#3,014	Answer: D
What causes the difference in the pressure shown on the working
pressure gauge and the actual pressure at the torch tip?
A line drop
B resistance of the gas as it flows through the hose
C There is no difference in pressure.
D both a and b
E
#3,015	Answer: B
How far from the actual work should regulators be located?
A 25 ft (7.6 m)
B so that flames or sparks cannot reach the regulators
C 10 ft (3m)
D so that the regulators can be easily reached
E
#3,016	Answer: A
A notched nut indicates:
A left-hand threads.
B that the nut is extra strong.
C right-hand threads.
D that the nut is made of brass.
E
#3,017	Answer: B
Combination welding and cutting torches are most often used
A to cut thick material.
B by schools and small welding shops.
C by steel mills.
D both a and c
E
#3,018	Answer: D
An injector torch can use fuel gases with pressures as low as:
A 4 oz/in2 (17.5 g/cm2).
B 2 lb/in2 (140.6 g/cm2).
C 1 lb/in2 (70.3 g/cm2).
D 6 oz/in2 (26.3 g/cm2).
E
#3,019	Answer: C
Injector torches can use fuel gases with pressures as low as:
A 7 psi (0.49 kg/cm2).
B 2 psig (0.14 kg/cm2g).
C 6 oz/in2 (26.3 g/cm2).
D 9 oz/in2 (39.4 g/cm2).
E
#3,020	Answer: C
All welding tips are numbered according to:
A the AWA standard numbering system.
B the National Association of Equipment Manufacturers numbering
system.
C the manufacturer's own numbering system.
D both a and b
E
#3,021	Answer: D
Repeated use of a tip cleaner:
A keeps the tip clean and in good shape.
B makes welding easy.
C makes the torch easy to light.
D enlarges the orifice in the tip.
E
#3,022	Answer: D
Which one of the following will affect the temperature of an
oxyacetylene flame?
A flame condition (neutral, oxidizing, or carburizing)
B purity of the gases
C homogeneity of the gas mixture
D all of these
E
#3,023	Answer: C
The highest temperature produced in an oxyacetylene flame is
found:
A in the inner cone.
B near the end of the secondary flame.
C around the inner cone.
D along the centerline of the flame.
E
#3,024	Answer: A
The maximum safe pressure of acetylene is:
A 15 psig (1.05 kg/cm2g).
B 26 psig (172 kPa).
C 30 psig (2.1 kg/cm2g).
D 10 psig (69 kPa).
E
#3,025	Answer: D
Which one of the following is used inside an acetylene cylinder
to absorb the gas?
A calcium carbide
B alkaline
C acetate
D acetone
E
#3,026	Answer: B
MSDS information:
A specifies how to safely handle hazardous materials.
B specifies possible hazards resulting from use of a product.
C is usually kept on record in the shop office.
D is obtained from OSHA.
E
#3,027	Answer: A
Forced ventilation is not required in shops having 16 ft. ceiling
and 10,000 sq. ft. of space per welder.
A True
B False
C
D
E
#3,028	Answer: A
Using an acetylene cylinder too soon after it has laid on its
side may result in damage to the regulator.
A True
B False
C
D
E
#3,029	Answer: C
A leaking fuel gas cylinder should be:
A ventilated and posted, but not moved.
B moved to empty cylinder storage area and posted.
C moved outside, emptied and posted.
D moved away from all potential sources of combustion and
posted.
E
#3,030	Answer: D
High rates of withdrawal of gas from a liquified gas cylinder
will cause:
A liquid to be drawn out.
B a drop in cylinder pressure.
C a lowering of the cylinder temperature.
D both b and c.
E
#3,031	Answer: C
When bleeding the pressure from a system, it should be done:
A very slowly.
B very quickly.
C by opening only one valve at a time.
D by opening both valves at the same time.
E
#3,032	Answer: B
If two hoses must be taped together, they should be taped every:
A 8 in. (203 mm).
B 12 in. (305 mm).
C 18 in. (457 mm).
D 25 in. (610 mm).
E
#3,033	Answer: C
Oxygen and acetylene hoses must always be color coded in which
one of the following ways?
A oxygen green, acetylene black or red
B oxygen green or black, acetylene red
C oxygen green, acetylene red
D oxygen green or black, acetylene red or black
E
#3,034	Answer: A
Why is the pressure bled off a regulator and the adjusting screw
backed out?
A to prevent the diaphragm from stretching
B to prevent regulator creep
C to reduce the possibility of torch damage
D to stop unauthorized use of the equipment
E
#3,035	Answer: C
Why are newly assembled hoses purged before they are used for the
first time?
A to get fresh gas in the lines
B so that the torch lights quickly
C to remove air from the lines
D to remove soot from the tip
E
#3,036	Answer: D
How should a welding tip be tightened?
A with a wrench
B with pliers
C by hand only
D as recommended in the owner's manual
E
#3,037	Answer: D
Turning the fuel valve off slowly may cause the torch to:
A overheat.
B pop.
C make a whistling sound.
D flashback.
E
#3,038	Answer: D
What will happen if unalloyed copper is used for piping
acetylene?
A A poisonous gas will be produced.
B A phosgene gas will be produced.
C An explosive compound will be produced.
D All of these will be produced.
E
#3,039	Answer: B
What is the maximum pressure to which a manifold system should be
tested?
A 2 times the operating pressure
B 1 1/2 times the operating pressure
C 1 1/4 times the operating pressure
D 225 psig (15.8 kg/cm2g)
E
#3,040	Answer: A
Oil must never be used on a regulator because it could:
A cause a fire or explosion.
B contaminate the gas.
C clog small internal openings.
D both a and b
E
#3,041	Answer: D
Oxyacetylene welding of sheet is restricted to:
A thin sections.
B sections thinner than 11 gauge.
C portable welding requirements.
D all of these.
E
#3,042	Answer: C
What gas protects the weld from oxidation?
A He
B C2H2
C CO2
D Ar
E
#3,043	Answer: A
As the flame angle is increased to 90 degs., the weld pool:
A becomes larger.
B becomes smaller.
C has more oxides.
D penetrates less.
E
#3,044	Answer: B
As the welding speed decreases, the weld pool:
A has no change in size.
B increases in size.
C looks flatter.
D has more oxides.
E
#3,045	Answer: C
The distance between the inner cone and the pool should be:
A 1/8 in. to 1/2 in. (3 mm to 13 mm).
B 3/8 in. to 1/2 in. (10 mm to 13 mm).
C 1/8 in. to 1/4 in. (3 mm to 6 mm).
D 1/16 in. to 1/8 in. (2 mm to 3 mm).
E
#3,046	Answer: B
As the flame distance from the inner cone to the pool increases,
the size of the weld pool:
A increases.
B decreases.
C cannot be controlled.
D does not change.
E
#3,047	Answer: A
Large welding rod sizes can be used to:
A cool the molten pool.
B increase weld penetration.
C reduce distortion.
D weld only on thick sheet.
E
#3,048	Answer: A
Rapidly removing the flame from a molten pool:
A causes the pool to rapidly oxidize.
B causes the pool to cool too quickly.
C causes the pool to solidify before it drips.
D prevents crater cracking.
E
#3,049	Answer: A
Sparks flying from a weld pool are mostly:
A silicon oxides.
B iron oxides.
C carbon dioxide.
D dirt or dust.
E
#3,050	Answer: D
If the end of the welding rod is not kept inside the flame, the
weld will be:
A more elastic.
B stronger.
C softer.
D brittle.
E
#3,051	Answer: B
Where should the flame be pointed if two unequal sizes of metal
are being welded together in a butt joint?
A on the thinner metal
B on the thicker metal
C in the center of the joint
D on the bottom sheet
E
#3,052	Answer: D
When welding a lap joint, the flame must be directed:
A on the thinner metal.
B on the thicker metal.
C in the center of the joint.
D on the bottom sheet.
E
#3,053	Answer: C
During vertical welds, the molten weld pool is held in place by:
A surface tension.
B gravity.
C a shelf along the lower edge of the weld pool.
D the force produced by the torch.
E
#3,054	Answer: B
What holds the molten metal in place when a welder is welding on
the bottom side of a horizontal pipe?
A flame pressure
B surface tension
C the welding rod
D gravity
E
#3,055	Answer: B
What holds the weld pool on an overhead sheet?
A gravity
B surface tension
C force of the flame
D chemical attraction
E
#3,056	Answer: B
Pipe should be gas welded when:
A the pipe is in a hard-to-reach place.
B the pipe is mild steel.
C the diameter of the pipe is small.
D there are only a few joints to be welded.
E
#3,057	Answer: D
A welder knows when burnthrough is about to take place when:
A the puddle becomes wide.
B the puddle begins to develop an orange color.
C oxides float to the top of the puddle.
D there is an increase in sparks in the air.
E
#3,058	Answer: A
If the angle of the torch is increased from 45 degs. to 90 degs.:
A the rate of heating increases.
B the rate of heating decreases.
C the rate of heating remains unchanged.
D the torch will run cooler.
E
#3,059	Answer: B
The technique of "flashing the torch off" is performed by
completely removing, and then quickly returning the flame to the
weld puddle before it solidifies.
A True
B False
C
D
E
#3,060	Answer: C
An acetylene cylinder is filled with:
A liquid acetylene.
B liquid acetate.
C porous material.
D acetone.
E
#3,061	Answer: A
Acetylene should not be withdrawn at a rate faster than
the total cylinder capacity per hour.
A one-seventh
B one-fifth
C one-half
D one-quarter
E
#3,062	Answer: D
High rates of withdrawal of gas from a liquified gas cylinder
will cause.
A liquid to be drawn out.
B a drop in cylinder pressure.
C a lowering of the cylinder temperature.
D both b and c.
E
#3,063	Answer: B
Which oxyfuel gas mixture has the highest burn rate?
A oxy-MAPP
B oxy-hydrogen
C oxy-acetylene
D oxy-natural gas
E
#3,064	Answer: B
The major advantage of acetylene compared to all other
alternative fuel gases is:
A heat
B temperature.
C cost
D safety
E
#3,065	Answer: A
Propane and natural gas are rarely used for purposes other than:
A heating and cutting.
B brazing and welding.
C cutting and welding.
D heating.
E
#3,066	Answer: B
The fuel gas with the fastest burning velocity is:
A MAPP.
B hydrogen.
C natural gas.
D acetylene.
E
#3,067	Answer: D
Ferrous filler metal rods are primarily:
A copper.
B vanadium.
C silicon.
D iron.
E
#3,068	Answer: A
RG45 electrodes are used for:
A general-purpose gas welding.
B aircraft tubing.
C ASME high-pressure piping.
D gas tungsten arc welding.
E
#3,069	Answer: C
RC1 electrodes are used to weld on which one of the following
types of metal?
A aluminum
B mild steel
C cast iron
D copper
E
#3,070	Answer: C
AWS classifies stainless steel filler materials:
A as non-ferrous.
B as low-alloy steels.
C as ferrous.
D as non-corrosion resistant
E
#3,071	Answer: D
The parts of an oxidizing flame are:
A inner cone and outer cone.
B inner cone, feather, outer cone.
C inner envelope and outer cone.
D inner cone and outer envelope.
E
#3,072	Answer: B
Square, bevel, and double-bevel are all:
A types of joints.
B edge preparations.
C joint dimensions.
D All of the above are correct.
E
#3,073	Answer: A
A correctly sized weld should be approximately:
A the same size as the metal is thick.
B twice the thickness of the metal.
C equal to 1 1/2 times the joint depth.
D 1 l/2 times the electrode size.
E
#3,074	Answer: D
Welds that are oversized:
A add strength to the weldment.
B are better than too undersized welds.
C are less likely to break later.
D can cause the joint to fail.
E
#3,075	Answer: B
A correctly sized weld will:
A make the joint ridged.
B allow enough joint flexibility to prevent cracking.
C keep the joint stiff and inflexible.
D Both A and C are correct.
E
#3,076	Answer: C
Brazed joints can be how many times stronger than the filler
metal?
A 1 to 2 times
B 3 to 4 times
C 4 to 5 times
D 7 to 9 times
E
#3,077	Answer: C
Brazing may not occur at a temperature below:
A 675 degs. F (375 C).
B 450 degs. F (232 C).
C 840 degs. F (450 C).
D 565 degs. F (292 C).
E
#3,078	Answer: B
Braze welding differs from brazing in the:
A type of filler metal used.
B lack of capillary action in the joint.
C temperature range.
D type of flux used.
E
#3,079	Answer: A
Generally, as the joint space decreases,:
A the joint strength increases.
B there is no change in joint strength.
C the joint strength decreases.
D the joint takes considerably less time to produce.
E
#3,080	Answer: A
The ability of a joint to resist chemical attack is known as:
A corrosion resistance.
B fatigue resistance.
C electrical resistance.
D intergranular resistance.
E
#3,081	Answer: B
A flux must:
A remove oil.
B promote wetting.
C clean dirt.
D do all of these
E
#3,082	Answer: D
A flux is able to remove:
A oil.
B dirt.
C heavy oxides.
D only light oxides.
E
#3,083	Answer: D
What happens if a soldered or brazed joint is overheated?
A The flux becomes more active.
B The metal becomes too viscous.
C Nothing happens if the joint is cooled quickly.
D The flux may burn up.
E
#3,084	Answer: C
A flux that is active at room temperature must be:
A stored in specialized containers.
B handled with extreme caution.
C neutralized after the job is completed.
D cannot be used for tin-lead solders.
E
#3,085	Answer: B
The paste range of a filler metal:
A is just above the wetting temperature.
B is a temperature range where the filler metal is not
completely liquid or solid.
C is a point where fluidity is at its highest.
D is the temperature at which most phase bonding occurs.
E
#3,086	Answer: B
The temperature at which an alloy melts when heated and
solidifies when-cooled is known as:
A transition temperature.
B eutectic point.
C paste range.
D no alloy melts and solidifies at the same temperature.
E
#3,087	Answer: A
What will happen if solders containing cadmium are overheated?
A The cadmium will form hazardous fumes.
B The alloy will have better wetting action.
C The joint will draw in the alloy better.
D It is not possible to overheat cadmium alloys.
E
#3,088	Answer: A
The best type of flame for tin-lead soldering is:
A air propane.
B air acetylene.
C oxy MAPP.
D oxyacetylene.
E
#3,089	Answer: D
What type of steel is indicated by the AISI and SAE alloy steel
number 40XX?
A carbon
B manganese
C nickel
D molybdenum
E
#3,090	Answer: A
Plain carbon steel is basically an alloy of:
A carbon and iron.
B carbon, silicon, sulfur, manganese, and phosphorus.
C carbon, silicon, and manganese.
D carbon, sulfur, and phosphorus.
E
#3,091	Answer: C
Low-carbon steel contains           or less carbon.
A 1%
B 3%
C 0.3%
D 0.03%
E
#3,092	Answer: D
High-carbon steels have a tendency to be              if welded
without preheating and postheating.
A hard and ductile
B brittle and strong
C ductile and soft
D hard and brittle
E
#3,093	Answer: B
In austenitic stainless steel, type 18-8 means:
A 18% nickel, 8% chromium.
B 18% chromium, 8% nickel.
C 18% chromium-nickel equivalent, 8% other alloys.
D It is the same number for a stainless steel.
E
#3,094	Answer: B
Carbon in gray cast iron:
A increases weldability.
B reduces ductility.
C raises the melting temperature.
D increases tensile strength.
E
#3,095	Answer: B
White cast iron is:
A easily welded using oxyfuel.
B practically not weldable.
C best welded using a shielded metal arc.
D welded without preheating.
E
#3,096	Answer: B
The most frequently used testing method is:
A the guided bend test.
B visual inspection.
C the tensile test.
D destructive testing.
E
#3,097	Answer: A
A major difference between mechanical testing and
nondestructive testing is that most mechanical testing:
A destroys the product being tested.
B can be used only on small test plates.
C is used on metal up to but not more than 3/8 in. (10 mm)
thick.
D is used on metal thicker than 3/8 in. (10 mm).
E
#3,098	Answer: D
Ball-shaped gas pockets trapped in a weld:
A are weld defects.
B are forms of porosity.
C must be removed from the weld and repaired.
D are all of these.
E
#3,099	Answer: C
A welding process not likely to cause cracking is:
A ultrasonic welding.
B oxyacetylene welding.
C stud arc welding.
D flash welding.
E
#3,100	Answer: B
Inadequate joint penetration is easily located when using which
one of the following nondestructive methods?
A penetrant inspection or magnetic particle inspection
B radiographic inspection or ultrasonic inspection
C visual inspection or eddy current inspection
D penetrant inspection or ultrasonic inspection
E