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Test Prep ASVAB Section 3: Mechanical Comprehension Exam
ASVAB Section Three : Mechanical Comprehension (Page 4 )

Updated On: 9-Feb-2026
Page 4 of 39
PDF with 187 Questions

When Cam A completes one revolution, the lever will touch the contact point ________ .

  1. once
  2. never
  3. four times
  4. twice.

Answer(s): D

Explanation:

When the high point of the cam connects with the lever arm, the lever arm will touch the contact point.
Two high points on the cam mean the lever arm will touch the contact point twice with each revolution of the cam.



A single block-and-fall is called a _______.

  1. fixed pulley
  2. gun tackle
  3. runner
  4. sheave

Answer(s): C

Explanation:

A single block-and-fall is called a runner.



In the figure above, if the fulcrum supporting the lever is moved closer to the cat, the cat will be ___________.

  1. easier to lift and will move higher
  2. harder to lift but will move higher
  3. easier to lift but will not move as high
  4. harder to lift and will not move as high

Answer(s): C

Explanation:

If the fulcrum is moved closer to the cat, the length of the effort arm of the lever will be increased, making the cat easier to raise, but the height to which the cat can be raised will be reduced.



The mechanical advantage of the block-and-tackle arrangement shown above is _________.

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

Answer(s): A

Explanation:

Because this block-and-tackle arrangement merely changes the direction of the pull, it has a mechanical advantage of only 2.



In the figure above, if the cogs move up the track at the same rate of speed, Cog A will __________.

  1. reach the top at the same time as Cog B
  2. reach the top after Cog B
  3. reach the top before Cog B
  4. have greater difficulty staying on track

Answer(s): C

Explanation:

The larger cog (Cog A) covers a greater linear distance in a given period of time.






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