ASVAB Mechanical Comprehension Practice Test 467455 Results

Your Results Global Average
Questions 5 5
Correct 0 2.75
Score 0% 55%

Review

1

The science that deals with motion and the forces that produce motion is called which of the following?

57% Answer Correctly

mechanics

aeronautics

engineering

physics


Solution

Mechanics deals with motion and the forces that produce motion.


2

Assuming force applied remains constant, which of the following will result in more work being done?

53% Answer Correctly

moving the object with more speed

moving the object farther

moving the object with more acceleration

increasing the coefficient of friction


Solution

Work is accomplished when force is applied to an object: W = Fd where F is force in newtons (N) and d is distance in meters (m). Thus, the more force that must be applied to move an object, the more work is done and the farther an object is moved by exerting force, the more work is done.


3

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

53% Answer Correctly

kinetic friction

static friction

normal 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.


4

Which class of lever offers no mechanical advantage?

45% Answer Correctly

third

first

second

none of these, all levers offer mechanical advantage


Solution

A third-class lever is used to increase distance traveled by an object in the same direction as the force applied. The fulcrum is at one end of the lever, the object at the other, and the force is applied between them. This lever does not impart a mechanical advantage as the effort force must be greater than the load but does impart extra speed to the load. Examples of third-class levers are shovels and tweezers.


5

According to Boyle's law, for a fixed amount of gas kept at a fixed temperature, which of the following are inversely proportional?

63% Answer Correctly

volume, mass

pressure, density

density, volume

pressure, volume


Solution

Boyle's law states that "for a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional".