ASVAB Mechanical Comprehension Practice Test 658997 Results

Your Results Global Average
Questions 5 5
Correct 0 3.12
Score 0% 62%

Review

1

Coplanar forces:

62% Answer Correctly

act in a common plane

pass through a common point

act along the same line of action

have opposite dimensions
Solution

Collinear forces act along the same line of action, concurrent forces pass through a common point and coplanar forces act in a common plane.

2

Which of the following is not a type of structural load?

49% Answer Correctly

wind load

live load

occupancy load

dead load
Solution

Dead load is the weight of the building and materials, live load is additional weight due to occupancy or use, snow load is the weight of accumulated snow on a structure and wind load is the force of wind pressures against structure surfaces.

3 How much work can a 9 hp engine do in 5 seconds?
53% Answer Correctly
4 ft⋅lb
1 ft⋅lb
36 ft⋅lb
24750 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:
\( W = 9 hp \times 550 \frac{ft⋅lb}{s} \times 5s = 24750 ft⋅lb \)
4

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

82% Answer Correctly

mass

inertia

kinetic energy

weight
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.

5

An inclined plane increases ___________ to reduce ____________.

58% Answer Correctly

force, distance

force, power

distance, force

distance, power
Solution

An inclined plane is a simple machine that reduces the force needed to raise an object to a certain height. Work equals force x distance and, by increasing the distance that the object travels, an inclined plane reduces the force necessary to raise it to a particular height. In this case, the mechanical advantage is to make the task easier. An example of an inclined plane is a ramp.