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  5. ASVAB Section 3: Mechanical Comprehension

Test Prep ASVAB Section 3: Mechanical Comprehension Exam
ASVAB Section Three : Mechanical Comprehension (Page 2 )

Updated On: 7-Feb-2026
Page 2 of 39
PDF with 187 Questions

An induction clutch works by __________.

  1. magnetism
  2. pneumatics
  3. hydraulics
  4. friction

Answer(s): A

Explanation:

An induction clutch is a magnetic clutch.



If a first class lever with a resistance arm measuring 2 feet and an effort arm measuring 8 feet are being used, what’s the mechanical advantage?

  1. 2
  2. 4
  3. 6
  4. 1

Answer(s): B

Explanation:

Mechanical advantage can be calculated as Length of Effort Arm ÷ Length of Resistance Arm. MA = 8 ÷ 2 = 4.



The bottoms of four boxes are shown above. The boxes all have the same volume.
If postal regulations state that the sides of a box must meet a minimum height, which box is most likely to be too short to go through the mail?

  1. NO. 4
  2. NO. 2
  3. NO. 1
  4. NO. 3

Answer(s): D

Explanation:

The box with the largest area on the bottom will have the shortest sides.
If length × width × height = volume, and all the boxes have equal volume, then the sides must be shortest on the box with the largest area on the bottom.
Calculate the area of each box bottom:
NO. 1 = 20 square inches;
NO. 2 = 35 square inches; NO. 3 = 48 square inches; and NO. 4 = 27 square inches.
NO. 3, which has the largest area, will have the shortest sides.



Looking at the figure above, when Cat B lands on the seesaw, Cat A will .

  1. remain stationary
  2. hit the ground hard
  3. rise in the air quickly
  4. enter the stratosphere

Answer(s): C

Explanation:

Cat B landing on the seesaw will propel Cat A into the air.



Air weighs about 15 psi.
What’s the amount of pressure (force) exerted on the top of your head, given a surface area of 24 inches?

  1. 360 pounds
  2. 625 pounds
  3. 5⁄8 pound
  4. 180 pounds

Answer(s): A

Explanation:

Power equals force divided by area in square inches (P = F⁄A). This formula can also be stated as F = A × P.
Substitute the known quantities.
F = 15 × 24 = 360 pounds.






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