ASVAB Mechanical Comprehension Practice Test 346241 Results

Your Results Global Average
Questions 5 5
Correct 0 3.19
Score 0% 64%

Review

1

What type of load creates different stresses at different locations on a structure?

60% Answer Correctly

static uniformly distributed load

non-uniformly distributed load

dynamic load

impact load
Solution

A concentrated load acts on a relatively small area of a structure, a static uniformly distributed load doesn't create specific stress points or vary with time, a dynamic load varies with time or affects a structure that experiences a high degree of movement, an impact load is sudden and for a relatively short duration and a non-uniformly distributed load creates different stresses at different locations on a structure.

2 If input effort is 100 ft⋅lb, what output effort will be produced by a machine with a mechanical advantage of 9?
79% Answer Correctly
1800ft⋅lb
11ft⋅lb
900 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 100 ft⋅lb by 9 to produce an output effort of 900 ft⋅lb.
3

Which of the following is not a characteristic of a ceramic?

60% Answer Correctly

high melting point

low corrosive action

chemically stable

low density
Solution

Ceramics are mixtures of metallic and nonmetallic elements that withstand exteme thermal, chemical, and pressure environments. They have a high melting point, low corrosive action, and are chemically stable. Examples include rock, sand, clay, glass, brick, and porcelain.

4

A fixed pulley is useful for which of the following?

53% Answer Correctly

multiplying the input distance

multiplying the input force

changing the direction of the output force

changing the direction of the input force
Solution

A fixed pulley is used to change the direction of a force and does not multiply the force applied. As such, it has a mechanical advantage of one. The benefit of a fixed pulley is that it can allow the force to be applied at a more convenient angle, for example, pulling downward or horizontally to lift an object instead of upward.

5

A fixed pulley has a mechanical advantage of:

68% Answer Correctly

-1

0

2

1
Solution

A fixed pulley is used to change the direction of a force and does not multiply the force applied. As such, it has a mechanical advantage of one. The benefit of a fixed pulley is that it can allow the force to be applied at a more convenient angle, for example, pulling downward or horizontally to lift an object instead of upward.