ASVAB Mechanical Comprehension Practice Test 887362 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.20
Score	0%	64%

Review

1 If A = 5 ft. and the green box weighs 15 lbs. what is the torque acting on the A side of this lever?

76% Answer Correctly

	18 ft⋅lb
	225 ft⋅lb
	75 ft⋅lb
	25 ft⋅lb

Solution

For a lever, torque is weight x distance from the fulcrum which, in this case, is: 15 ft. x 5 lbs. = 75 ft⋅lb

A box is resting on a smooth floor. Static friction is present:

59% Answer Correctly

	at all times
	only if normal force is present
	if the coefficient of friction is greater than one
	when an attempt is made to move the box

Solution

For any given surface, the coefficient of static friction is higher than the coefficient of kinetic friction. More force is required to initally get an object moving than is required to keep it moving. Additionally, static friction only arises in response to an attempt to move an object (overcome the normal force between it and the surface).

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

57% Answer Correctly

	physics
	aeronautics
	engineering
	mechanics

Solution

Mechanics deals with motion and the forces that produce motion.

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

70% Answer Correctly

	inclined plane
	third-class lever
	second-class lever
	first-class lever

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.

What type of load creates different stresses at different locations on a structure?

60% Answer Correctly

	non-uniformly distributed load
	dynamic load
	static 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.