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  5. ASVAB Section 3: Mechanical Comprehension

Free ASVAB Section 3: Mechanical Comprehension Exam Braindumps (page: 13)

Page 12 of 47
PDF with 187 Questions

If Gear A turns left in the figure above, Gear B___________________.

  1. won’t turn
  2. turns left
  3. turns right
  4. It can’t be determined.

Answer(s): C

Explanation:

Gears in mesh always turn in opposite directions.



If Gear 1 makes 10 complete clockwise revolutions per minute in the figure above, then ____________.

  1. Gear 2 makes 10 complete clockwise revolutions per minute.
  2. Gear 2 makes 20 complete counterclockwise revolutions per minute.
  3. Gear 2 makes 5 complete counterclockwise revolutions per minute.
  4. Gear 3 keeps Gear 2 from making any revolutions.

Answer(s): B

Explanation:

If Gear 1 turns at 10 rpm, then Gear 2, which is half the size, turns twice as fast at a rate of 20 rpm.



For the fuel to travel from Reservoir A to Reservoir B, passing through Filters C and D on the way, which valves must be open?

  1. 1, 2, 4, and 8
  2. 1, 2, and 3
  3. 6, 7, and 8
  4. 4, 6, and 7

Answer(s): A

Explanation:

Opening Valves 1, 2, 4, and 8 allows the fuel to travel through the filters. Opening Valves 1, 2, and 3 doesn’t allow the fuel to travel through the filters. Opening Valves 6, 7, and 9 doesn’t allow the fuel to travel through the filters.
Opening Valves 4, 6, and 7 will allow fuel to travel through the filters but not to Reservoir B.



A yellow flame on a gas furnace indicates _______________.

  1. Everything is fine.
  2. The fuel-air mixture is too rich.
  3. The fuel-air mixture is too lean.
  4. The gas pressure is too low.

Answer(s): B

Explanation:

A yellow flame indicates too much fuel or not enough air. More air should be allowed to enter and mix with the gas. Thus, the fuel-air mixture is too rich.






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