ASVAB Mechanical Comprehension Practice Test 992613 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.02
Score	0%	60%

Review

1 How much work can a 7 hp engine do in 7 seconds?

52% Answer Correctly

	26950 ft⋅lb
	14 ft⋅lb
	3 ft⋅lb
	28 ft⋅lb

Solution

Horsepower (hp) is a common measure of power output for complex machines. By definition, a 1 hp machine does 550 ft⋅lb of work in 1 second: 1 hp = 550 ft⋅lb/s. Substituting the variables for this problem gives us:
\( W = 7 hp \times 550 \frac{ft⋅lb}{s} \times 7s = 26950 ft⋅lb \)

Which of the following will increase the mechanical advantage of this inclined plane?

59% Answer Correctly

	increase the force acting at the blue arrow
	lengthen the ramp
	lower the force acting at the blue arrow
	shorten the ramp

Solution

The mechanical advantage (MA) of an inclined plane is the effort distance divided by the resistance distance. In order to increase mechanical advantage, this ratio must increase which means making the effort distance longer and this can be accomplished by lengthening the length of the ramp.

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

60% Answer Correctly

	dynamic load
	impact load
	non-uniformly distributed load
	static uniformly distributed 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.

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

58% Answer Correctly

	pulley
	screw
	lever
	gear

Solution

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

Which of the following is not a type of bridge?

74% Answer Correctly

	block
	cable
	arch
	truss

Solution

The six basic bridge forms are beam, truss, arch, cantilever, cable, and suspension.