ASVAB Mechanical Comprehension Practice Test 409859 Results

Your Results Global Average
Questions 5 5
Correct 0 3.01
Score 0% 60%

Review

1

What's the last gear in a gear train called?

38% Answer Correctly

driver gear

idler gear

driven gear

output gear
Solution

A gear train is two or more gears linked together. Gear trains are designed to increase or reduce the speed or torque outpout of a rotating system or change the direction of its output. The first gear in the chain is called the driver and the last gear in the chain the driven gear with the gears between them called idler gears.

2 If input effort is 500 ft⋅lb, what output effort will be produced by a machine with a mechanical advantage of 9?
79% Answer Correctly
9000ft⋅lb
1125ft⋅lb
4500 ft⋅lb
0ft⋅lb
Solution
Mechanical advantage is the ratio of output force to input force and tells us by how many times a machine multiplies input effort. So, a machine with a mechanical advantage of 9 will multiply an input effort of 500 ft⋅lb by 9 to produce an output effort of 4500 ft⋅lb.
3

Normal force is generally equal to the __________ of an object.

61% Answer Correctly

density

weight

coefficient of friction

mass
Solution

Normal force arises on a flat horizontal surface in response to an object's weight pressing it down. Consequently, normal force is generally equal to the object's weight.

4

The mass of an object correlates to the size of the object but ultimately depends on:

66% Answer Correctly

the object's density

the object's potential energy

the object's weight

gravity
Solution

Mass is a measure of the amount of matter in an object.  In general, larger objects have larger mass than smaller objects but mass ultimately depends on how compact (dense) a substance is.

5

The work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. This defines which of the following?

60% Answer Correctly

mechanical advantage

work-energy theorem

conservation of mechanical energy

Pascal's law
Solution

The work-energy theorem states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. Simply put, work imparts kinetic energy to the matter upon which the work is being done.