mitc
09
qumc

Body mechanics is best defined as:
correct positioning of the body for a given task
Correct. Body mechanics is the correct positioning of the body for a given task.
the science of designing and arranging things to maximize efficiency, health, and safety
Incorrect. Ergonomics is the science of designing and arranging things to maximize efficiency, health, and safety.
staying fit by exercising regularly
Incorrect. Staying fit by exercising regularly is a good preventive practice for health and safety.

When you are sitting at a computer, the proper angle for your elbow is:
90-100 degrees
Correct. When you are sitting at a computer, your elbow should be at a 90- to 100-degree angle.
neutral position
Incorrect. When you are sitting at a computer, your elbow should be at a 90- to 100-degree angle.
110-120 degrees
Incorrect. When you are sitting at a computer, your elbow should be at a 90- to 100-degree angle.

When you are sitting at a computer, the proper angle for your wrists is:
neutral position
Correct. When you are sitting at a computer, your wrists should be in a neutral position.
30-60 degrees
Incorrect. When you are sitting at a computer, your wrists should be in a neutral position.
90-100 degrees
Incorrect. When you are sitting at a computer, your wrists should be in a neutral position.

When you are sitting at a computer, the monitor should be positioned so that the top of the monitor is:
just below eye level
Correct. The best placement of the monitor is just below eye level.
just above eye level
Incorrect. The monitor's placement above eye level would cause an unnatural arching of the neck.
10-12 inches below eye level
Incorrect. The monitor's placement this far below eye level would cause a forward arching of the neck.

Which of the following statements is true regarding the use of a mouse as a pointing device when working with a computer?
Extensive use of the mouse has been shown to be a major contributor to RMIs.
Correct. Extensive use of the mouse has been shown to be a major contributor to RMIs.
Extensive use of the mouse has been shown to decrease the incidence of RMIs.
Incorrect. Extensive use of the mouse has been shown to be a major contributor to RMIs.
Extensive use of the mouse has neither increased nor decreased the incidence of RMIs.
Incorrect. Extensive use of the mouse has been shown to be a major contributor to RMIs.

Why does using a computer create eyestrain?
The eyes have to work harder because the computer display has a less consistent density.
Correct. The less consistent density requires greater effort by the eyes.
The computer display type is darker and more dense and consistent than printed material.
Incorrect. The computer display has a less consistent density; therefore, extra effort is required to focus it.
Computer usage does not cause eyestrain any more than reading printed material does.
Incorrect. The computer screen does cause more eyestrain due to the greater difficulty in focusing a more diffused type.

