#1001  Burns that cause the skin to form blisters only are referred to as:   	2	first-degree burn.   	second-degree burn.   	third-degree burn.   	none of these.   	   	
#1002  Which light wavelengths are most harmful?    	2	visible and infrared   	ultraviolet   	infrared   	visible and ultraviolet   	   	
#1003  What might happen if the gasket is not correctly installed on an arc welding lens assembly?   	2	The lens assembly might fall out.   	A welder's eyes may be subjected to ultraviolet light.   	The lenses will be come dirty more quickly.   	Welding smoke may get into the helmet.   	   	
#1004  Very small cracks in a welding lens can be found by which one of the following procedures?   	3	washing the lens in water   	welding and watching for bright light spots   	twisting the lens between your fingers   	Small cracks are not a problem and need not be found.   	   	
#1005  Fatal electrical shock is possible with voltages as low as:    	4	460.   	220   	110.   	80.   	   	
#1006  Clothing worn in the welding shop should be:    	1	100% wool or 100% cotton.   	100% polyester or 100% nylon.   	25% cotton and 75% rayon.   	35% polyester and 65% rayon.   	   	
#1007  Why should the top button of a welder's shirt always be buttoned?    	1	to prevent throat burns   	so that the welder is neatly dressed   	to reduce the change of the shirt being caught in the equipment  	to keep the shirt from catching on fire   	   	
#1008  The haze in welding shops is caused by:    	3	dust.   	cigarette and pipe smoke.   	decomposed and vaporized fluxes and metals.   	high-speed fans.   	   	
#1009  How far must oxygen cylinders be stored from flammable materials?    	4	5 ft (1.5 m)   	10 ft (3 m)   	16 ft (4.9 m)   	20 ft (6.1 m)   	   	
#1010  A room that is used to store acetylene cylinders must:    	4	be well lit.   	have a solid steel door.   	be large enough for two workers.   	be located away from halls.   	   	
#1011  Where would a person find information about the maximum safe rpm for a grinding stone?   	3	on the grinder   	on a chart   	on the blotter on the stone   	The rpm is not important.   	   	
#1012  The tool rest on a grinder should be kept adjusted to within of the face of the stone.   	2	1/4 in. (6 mm)   	1/16 in. (2 mm)   	3/8 in. (10 mm)   	1/8 in. (3 mm)   	   	
#1013  The first stage of a two-stage regulator reduces the cylinder pressure to approximately:   	3	125 psig (8.7 kg/cm2g).   	175 psig (12.3 kg/cm2g).   	225 psig (17.5 kg/cm2g).   	300 psig (21.0 kg/cm2g).   	   	
#1014  What causes the difference in the pressure shown on the working pressure gauge and the actual pressure at the torch tip?   	4	line drop   	resistance of the gas as it flows through the hose   	There is no difference in pressure.   	both a and b   	   	
#1015  How far from the actual work should regulators be located?    	2	25 ft (7.6 m)   	so that flames or sparks cannot reach the regulators   	10 ft (3 m)   	so that the regulators can be easily reached   	   	
#1016  A notched nut indicates:    	1	left-hand threads.   	that the nut is extra strong.   	right-hand threads.   	that the nut is made of brass.   	   	
#1017  Shortening the arc length during a weld:    	3	increases spatter.   	causes porosity.   	increases the rate of metal transfer.   	reduces penetration.   	   	
#1018  As the welding current increases:    	2	he weld width and buildup increases.   	the weld spatter and width increases.   	the weld penetration and buildup increases.   	the weld width and buildup decreases.   	   	
#1019  An arc welding electrode that is discolored after a weld is completed indicates that the:   	1	amperage was set too high.   	arc length was too short.   	rod angle was too steep.   	metal was too thick.   	   	
#1020  As the welding arc length increases:    	3	spatter increases and penetration increases.   	penetration increases and arc control decreases.   	spatter increases and penetration decreases.   	joint tracking is easier because the welder can see better and the arc length has no effect on weld quality.  	   	
#1021  A leading electrode angle will cause:    	2	deeper penetration.   	a wider weld bead.   	faster travel speed.   	more spatter.   	   	
#1022  As the electrode angle changes from a leading angle to a trailing angle, what happens to the weld?   	1	penetration increases and width decreases   	buildup decreases and width increases   	spatter decreases and penetration increases   	slag removal becomes easier   	   	
#1023  Which weave pattern works well on a vertical lap joint?    	2	square   	"T"   	circular   	figure 8   	   	
#1024  Most square butt joints have a root opening range from:    	3	1/16 in. (2 mm) to 1/8 in. (3 mm).   	1/8 in. (3 mm) to 1/4 in. (6 mm).   	0 in. (0 mm) to 1/8 in. (3 mm).   	1/8 in. (3 mm) to 3/16 in. (4.8 mm).   	   	
#1025  A leading electrode angle will cause:    	2	deeper penetration.   	a wider weld bead.   	faster travel speed.   	more spatter