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  4. ASVAB Section 3: Mechanical Comprehension

Free ASVAB Section 3: Mechanical Comprehension Exam Braindumps
ASVAB Section Three : Mechanical Comprehension Questions 91–95 (page: 20)

Updated On: 9-Feb-2026
Page 20 of 39
PDF with 187 Questions

When you heat water that is confined in a closed container so that the steam cannot escape, the pressure inside the container __________ and the temperature of the boiling water _________.

  1. increases, decreases
  2. increases, increases
  3. decreases, decreases
  4. decreases, increases

Answer(s): B

Explanation:

Heating an enclosed container of boiling water increases the pressure of the water vapor (steam) inside the container and increases the temperature of the water.



If Block A, on which the lever is resting, is moved farther away from Block B ______________.

  1. it will be harder to lift Block B but it will go higher
  2. it will be easier to lift Block B and it will go higher
  3. it will be harder to lift Block B and it will not be lifted to the same height
  4. it will be easier to lift Block B but it will not be lifted as high

Answer(s): A

Explanation:

It will be harder to lift Block B but it will go higher.
If Block A under the beam serving as the lever is moved away from Block B on top of the lever beam, the moment for the force exerted will increase, since the fulcrum is now closer to the force; this will make Block B harder to lift.
However, the height to which Block B on the end of the lever beam can be raised increases the further away Block A is moved from Block B.



For two gears to mesh properly, they must ______________.

  1. rotate at the same speed
  2. rotate in the same direction
  3. have the same size teeth
  4. have the same number of teeth

Answer(s): C

Explanation:

For two gears to mesh properly, they must have the same size teeth.
Different size gears will, by definition, rotate at different speeds even when their driving axles are moving at the same speed.
Also, interlocking or meshing gears rotate in opposite directions.



Kinetic energy is ______________.

  1. energy stored in chemicals, such as in a battery.
  2. energy in moving electrons, as in an electric current.
  3. energy in a moving object.
  4. energy that can be released under certain conditions.

Answer(s): C

Explanation:

Kinetic energy is energy in a moving object.
Energy stored in chemicals, such as in a battery, is chemical energy; energy in moving electrons, as in an electric current, is electric energy; and energy that can be released under certain conditions is potential energy.



The amount that a machine (simple or complex) multiplies your force or effort is called __________.

  1. load distance
  2. mechanical advantage
  3. resistance effect
  4. acceleration

Answer(s): B

Explanation:

The amount that a machine (simple or complex) multiplies your force or effort is called mechanical advantage. Load distance is how far the load moves when force is applied, and acceleration is the change in velocity or speed in a certain direction.



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