ASVAB Mechanical Comprehension Practice Test 904687 Results

Your Results Global Average
Questions 5 5
Correct 0 3.18
Score 0% 64%

Review

1

An object's resistance to changes in direction is known as:

82% Answer Correctly

inertia

mass

weight

kinetic energy
Solution

The more mass a substance has the more force is required to move it or to change its direction. This resistance to changes in direction is known as inertia.

2

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

60% Answer Correctly

non-uniformly distributed load

dynamic load

impact 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.

3

The force amplification achieved by using a tool, mechanical device or machine system is called:

80% Answer Correctly

power

mechanical advantage

work

efficiency
Solution

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. Such a device utilizes input force and trades off forces against movement to amplify and/or change its direction.

4

Force of friction due to kinetic friction is __________ the force of friction due to static friction.

40% Answer Correctly

higher than

the same as

opposite

lower than
Solution

The formula for force of friction (Ff) is the same whether kinetic or static friction applies: Ff = μFN. To distinguish between kinetic and static friction, μk and μs are often used in place of μ.

5 How much work can a 1 hp engine do in 10 seconds?
52% Answer Correctly
4 ft⋅lb
2 ft⋅lb
5500 ft⋅lb
10 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:
\( W = 1 hp \times 550 \frac{ft⋅lb}{s} \times 10s = 5500 ft⋅lb \)