ASVAB ASVAB Mechanical Comprehension Principles 4

Question 1

A hydraulic jack has an input piston with area 2 sq in and an output piston with area 20 sq in. If you apply 50 lbs of force to the input, what force is produced at the output?

Accepted Answer

500 lbs

Answer

100 lbs

Answer

250 lbs

Answer

1000 lbs

Question 2

Which type of gear arrangement reverses the direction of rotation between the driver and driven gear?

Accepted Answer

Spur gear pair (external)

Answer

Worm gear

Answer

Bevel gear

Answer

Planetary gear

Question 3

A steel beam is supported at both ends and loaded in the center. Where does the maximum bending stress occur?

Accepted Answer

At the center top and bottom surfaces

Answer

At the support points

Answer

Uniformly throughout

Answer

At the neutral axis

Question 4

A flywheel is used in an engine primarily to:

Accepted Answer

Store rotational energy and smooth out power pulses

Answer

Increase fuel efficiency

Answer

Reduce engine temperature

Answer

Increase compression ratio

Question 5

If a 10-foot ladder leans against a wall with its base 6 feet from the wall, how high up the wall does it reach?

Accepted Answer

8 feet

Answer

6 feet

Answer

7 feet

Answer

9 feet

Question 6

What happens to the pressure of a gas in a sealed container when the temperature increases (volume constant)?

Accepted Answer

Pressure increases

Answer

Pressure decreases

Answer

Pressure stays the same

Answer

Volume increases instead

Question 7

A cam converts:

Accepted Answer

Rotary motion to linear (reciprocating) motion

Answer

Linear motion to rotary motion

Answer

Fast rotation to slow rotation

Answer

Electrical energy to mechanical energy