ASVAB Mechanical Comprehension Practice Test 43932 Results

Your Results Global Average
Questions 5 5
Correct 0 3.69
Score 0% 74%

Review

1 If A = 1 ft. and the green box weighs 5 lbs. what is the torque acting on the A side of this lever?
74% Answer Correctly
0 ft⋅lb
5 ft⋅lb
15 ft⋅lb
10 ft⋅lb

Solution
For a lever, torque is weight x distance from the fulcrum which, in this case, is: 5 ft. x 1 lbs. = 5 ft⋅lb

2

A ramp is an example of which kind of simple machine?

84% Answer Correctly

none of these

wedge

inclined plane

first-class lever


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.


3

Which of these is the formula for force?

76% Answer Correctly

F = m/a

F = ma

F = a/m

F = am2


Solution

Newton's Second Law of Motion states that "The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object." This Law describes the linear relationship between mass and acceleration when it comes to force and leads to the formula F = ma or force equals mass multiplied by rate of acceleration.


4

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

density, volume

pressure, density

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".


5

Hydraulics is the transmission of force through the use of which of the following?

73% Answer Correctly

torque

liquids

gear systems

air pressure


Solution

Hydraulics is the transmission of force through the use of liquids. Liquids are especially suited for transferring force in complex machines because they compress very little and can occupy very small spaces. Hydraulic pressure is calculated by dividing force by the area over which it is applied: P = F/A where F is force in pounds, A is area in square inches, and the resulting pressure is in pounds per square inch (psi).