ASVAB Mechanical Comprehension Practice Test 226416 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.42
Score	0%	68%

Review

1 A 210 lb. barrel is rolled up a 17 ft. ramp to a platform that's 1 ft. tall. What effort is required to move the barrel?

53% Answer Correctly

	12.4 lbs.
	15.4 lbs.
	37.1 lbs.
	6.2 lbs.

Solution

This problem describes an inclined plane and, for an inclined plane, the effort force multiplied by the effort distance equals the resistance force multipied by the resistance distance:

F_ed_e = F_rd_r

Plugging in the variables from this problem yields:

F_e x 17 ft. = 210 lbs. x 1 ft.
F_e = \( \frac{210 ft⋅lb}{17 ft.} \) = 12.4 lbs.

Which of the following is not a type of simple machine?

58% Answer Correctly

	pulley
	screw
	gear
	lever

Solution

The six types of simple machines are the lever, wheel and axle, pulley, inclined plane, wedge, and screw.

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

74% Answer Correctly

	non-uniformly distributed load
	concentrated load
	dynamic 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.

4 If A = 2 ft. and the green box weighs 35 lbs. what is the torque acting on the A side of this lever?

75% Answer Correctly

	70 ft⋅lb
	280 ft⋅lb
	35 ft⋅lb
	210 ft⋅lb

Solution

For a lever, torque is weight x distance from the fulcrum which, in this case, is: 35 ft. x 2 lbs. = 70 ft⋅lb

When all forces acting on a system cancel each other out, this is called:

80% Answer Correctly

	equilibrium
	stasis
	potential energy
	rest

Solution

When a system is stable or balanced (equilibrium) all forces acting on the system cancel each other out. In the case of torque, equilibrium means that the sum of the anticlockwise moments about a center of rotation equal the sum of the clockwise moments.