ASVAB Mechanical Comprehension Practice Test 965363 Results

Your Results Global Average
Questions 5 5
Correct 0 3.28
Score 0% 66%

Review

1

The measure of how much of the power put into a machine is turned into movement or force is called:

56% Answer Correctly

power

mechanical advantage

force multiplication

efficiency
Solution

The efficiency of a machine describes how much of the power put into the machine is turned into movement or force. A 100% efficient machine would turn all of the input power into output movement or force. However, no machine is 100% efficient due to friction, heat, wear and other imperfections that consume input power without delivering any output.

2

Which of the following is not a type of bridge?

74% Answer Correctly

block

cable

arch

truss
Solution

The six basic bridge forms are beam, truss, arch, cantilever, cable, and suspension.

3

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.

4

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

85% Answer Correctly

tile

ice

leather

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.

5

Which of the following will increase the mechanical advantage of this inclined plane?

59% Answer Correctly

shorten the ramp

lower the force acting at the blue arrow

increase the force acting at the blue arrow

lengthen the ramp
Solution

The mechanical advantage (MA) of an inclined plane is the effort distance divided by the resistance distance. In order to increase mechanical advantage, this ratio must increase which means making the effort distance longer and this can be accomplished by lengthening the length of the ramp.