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  5. ASVAB Section 3: Mechanical Comprehension

Free ASVAB Section 3: Mechanical Comprehension Exam Braindumps (page: 22)

Page 21 of 47
PDF with 187 Questions

How can a gear system derive the greatest amount of mechanical advantage when a seven-tooth gear drives a ___________?

  1. 29-tooth gear
  2. 5-toothgear
  3. 24-tooth gear
  4. 17-tooth gear

Answer(s): A

Explanation:

The greater the difference between the number of teeth of the two meshed gears, the greater the torque or mechanical advantage.



An above-ground suburban water tank holds 540 gallons of water when full.
If the tank starts out full and is drained at a rate of 60 gallons per minute, how many seconds will it take to empty out halfway?

  1. 54
  2. 240
  3. 270
  4. 480

Answer(s): C

Explanation:

540 gallons divided by 60 gallons a minute means that it takes nine minutes to drain the tank completely. Half of that time is 4.5 minutes; 4.5 multiplied by 60 seconds equals 270 seconds.



Which of the following is not a simple machine?

  1. Lever
  2. Inclined plane
  3. Axe
  4. Pulley

Answer(s): C

Explanation:

An axe is a compound machine: the handle is a lever, and the head is two inclined planes (each side of the blade edge).



If you want to hammer in a heavy nail, it might be a good idea to use a hammer with a __________.

  1. lighter head
  2. heavy head
  3. longer handle
  4. shorter handle

Answer(s): C

Explanation:

A longer handle – a longer lever – allows the hammerhead to reach a higher speed, thereby producing more striking force.






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