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  5. ASVAB Section 3: Mechanical Comprehension

Free ASVAB Section 3: Mechanical Comprehension Exam Braindumps (page: 20)

Page 19 of 47
PDF with 187 Questions

Using a runner gives you a mechanical advantage of __________.

  1. 4
  2. 2
  3. 3
  4. 1

Answer(s): B

Explanation:

Using a runner (a single, moveable pulley) gives a mechanical advantage of 2.



For the valve shown in the figure above to open once each second, the cam must revolve at a rate of
________________.

  1. 6 rpm
  2. 10 rpm
  3. 15 rpm
  4. 3 rpm

Answer(s): A

Explanation:

Because 60 seconds comprise a minute, the valve must open 60 times per minute. The cam will open the valve 10 times per revolution, so 60 ÷ 10 = 6.
The cam must make 6 revolutions per minute to raise the valve 60 times per minute.



The figure above represents a water tank. Which of the following statements is not true?

  1. If Valves 1 and 2 are open and Valves 3, 4, and 5 are closed, the tank will eventually overflow.
  2. If all valves are open, the water remains at a constant level as long as the rate of intake is equal to the rate of discharge.
  3. Water in the tank will rise if Valves 1 and 2 are open and Valves 3 and 4 are closed.
  4. The tank will empty entirely if Valves 1 and 2 are closed and Valves 4 and 5 are open.

Answer(s): D

Explanation:

Because Valve 4 is above the bottom of the tank, some water will remain in the tank below the level of the valve, so the tank will never be completely empty.



Heat is a form of _______________.

  1. calories
  2. energy
  3. beneficence
  4. motion

Answer(s): B

Explanation:

Heat is a form of energy – Calories measure heat, beneficence is an attitude or emotion, and motion is something that can cause heat.






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