ASVAB Mechanical Comprehension Practice Test 214342 Results

Your Results Global Average
Questions 5 5
Correct 0 2.93
Score 0% 59%

Review

1

A wedge is most similar to what other type of simple machine?

70% Answer Correctly

third-class lever

second-class lever

first-class lever

inclined plane
Solution

The wedge is a moving inclined plane that is used to lift, hold, or break apart an object. A wedge converts force applied to its blunt end into force perpendicular to its inclined surface. In contrast to a stationary plane where force is applied to the object being moved, with a wedge the object is stationary and the force is being applied to the plane. Examples of a wedge include knives and chisels.

2

Depending on where you apply effort and resistance, the wheel and axle can multiply:

45% Answer Correctly

force or speed

speed or power

force or distance

power or distance
Solution

If you apply the resistance to the axle and the effort to the wheel, the wheel and axle will multiply force and if you apply the resistance to the wheel and the effort to the axle, it will multiply speed.

3

The principle of conservation of mechanical energy states that, as long as no other forces are applied, what will remain constant as an object falls?

45% Answer Correctly

kinetic energy

acceleration

total mechanical energy

potential energy
Solution

As an object falls, its potential energy is converted into kinetic energy. The principle of conservation of mechanical energy states that, as long as no other forces are applied, total mechanical energy (PE + KE) of the object will remain constant at all points in its descent.

4

The science that deals with motion and the forces that produce motion is called which of the following?

57% Answer Correctly

aeronautics

mechanics

engineering

physics
Solution

Mechanics deals with motion and the forces that produce motion.

5 If input effort is 100 ft⋅lb, what output effort will be produced by a machine with a mechanical advantage of 3?
79% Answer Correctly
33ft⋅lb
300 ft⋅lb
0ft⋅lb
150ft⋅lb
Solution
Mechanical advantage is the ratio of output force to input force and tells us by how many times a machine multiplies input effort. So, a machine with a mechanical advantage of 3 will multiply an input effort of 100 ft⋅lb by 3 to produce an output effort of 300 ft⋅lb.