ASVAB Mechanical Comprehension Practice Test 22460 Results

	Your Results	Global Average
Questions	5	5
Correct	0	2.71
Score	0%	54%

Review

What type of load doesn't create specific stress points or vary with time?

60% Answer Correctly

	non-uniformly distributed load
	concentrated 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.

Which of the following represents how much two materials resist sliding across each other?

53% Answer Correctly

	normal friction
	kinetic friction
	static friction
	coefficient of friction

Solution

Coefficient of friction (μ) represents how much two materials resist sliding across each other. Smooth surfaces like ice have low coefficients of friction while rough surfaces like concrete have high μ.

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.

4 How much work can a 5 hp engine do in 2 seconds?

52% Answer Correctly

	0 ft⋅lb
	1 ft⋅lb
	5500 ft⋅lb
	20 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:
\( W = 5 hp \times 550 \frac{ft⋅lb}{s} \times 2s = 5500 ft⋅lb \)

The work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. This defines which of the following?

60% Answer Correctly

	work-energy theorem
	Pascal's law
	conservation of mechanical energy
	mechanical advantage

Solution

The work-energy theorem states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. Simply put, work imparts kinetic energy to the matter upon which the work is being done.