ASVAB Mechanical Comprehension Practice Test 364269 Results

Your Results Global Average
Questions 5 5
Correct 0 3.63
Score 0% 73%

Review

1

A truck is using a rope to pull a car. Tension in the rope is greatest in which of the following places?

49% Answer Correctly

near the truck

tension is equal in all parts of the rope

near the car

in the middle
Solution

Tension is a force that stretches or elongates something. When a cable or rope is used to pull an object, for example, it stretches internally as it accepts the weight that it's moving. Although tension is often treated as applying equally to all parts of a material, it's greater at the places where the material is under the most stress.

2

Which of the following surfaces would have the lowest coefficient of friction?

85% Answer Correctly

leather

ice

tile

concrete
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.

3 If you lift a 39 lbs. rock 11 ft. from the ground, how much work have you done?
70% Answer Correctly
None of these is correct
429 ft⋅lb
28 ft⋅lb
209 ft⋅lb
Solution
Work is force times distance. In this case, the force is the weight of the rock so:
\( W = F \times d \)
\( W = 39 \times 11 \)
\( W = 429 \)
4

Drag is a type of:

81% Answer Correctly

potential energy

kinetic energy

work

friction
Solution

Drag is friction that opposes movement through a fluid like liquid or air. The amount of drag depends on the shape and speed of the object with slower objects experiencing less drag than faster objects and more aerodynamic objects experiencing less drag than those with a large leading surface area.

5

Which of the following surfaces would have the highest coefficient of friction?

77% Answer Correctly

steel

marble

ice

concrete
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.