ASVAB Mechanical Comprehension Practice Test 204322 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.72
Score	0%	74%

Review

1 What is the mechanical advantage of this inclined plane if the length of the ramp is 32 ft. and the height of the green box is 8 ft.?

82% Answer Correctly

	-2
	3.6
	4
	9

Solution

The mechanical advantage (MA) of an inclined plane is the effort distance divided by the resistance distance. In this case, the effort distance is the length of the ramp and the resistance distance is the height of the green box:

MA = \( \frac{d_e}{d_r} \) = \( \frac{32 ft.}{8 ft.} \) = 4

2 If you lift a 44 lbs. rock 12 ft. from the ground, how much work have you done?

71% Answer Correctly

	528 ft⋅lb
	1056 ft⋅lb
	0 ft⋅lb
	56 ft⋅lb

Solution

Work is force times distance. In this case, the force is the weight of the rock so:
\( W = F \times d \)
\( W = 44 \times 12 \)
\( W = 528 \)

Collinear forces:

72% Answer Correctly

	act along the same line of action
	pass through a common point
	are unrelated to each other
	act in a common plane

Solution

Collinear forces act along the same line of action, concurrent forces pass through a common point and coplanar forces act in a common plane.

What type of load acts on a relatively small area of a structure?

74% Answer Correctly

	dynamic load
	concentrated load
	non-uniformly distributed load
	impact load

Solution

A concentrated load acts on a relatively small area of a structure, a static uniformly distributed load doesn't create specific stress points or vary with time, a dynamic load varies with time or affects a structure that experiences a high degree of movement, an impact load is sudden and for a relatively short duration and a non-uniformly distributed load creates different stresses at different locations on a structure.

Friction between two or more solid objects that are not moving relative to each other is called:

73% Answer Correctly

	gravitational friction
	kinetic friction
	static friction
	dynamic friction

Solution

Static friction is friction between two or more solid objects that are not moving relative to each other. An example is the friction that prevents a box on a sloped surface from sliding farther down the surface.