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  5. ASVAB Section 3: Mechanical Comprehension

Free ASVAB Section 3: Mechanical Comprehension Exam Braindumps (page: 24)

Page 23 of 47
PDF with 187 Questions

When forces act in pairs they are ___________.

  1. equal in magnitude and opposite in direction
  2. equal in magnitude and in the same direction
  3. equal in magnitude
  4. unequal in magnitude

Answer(s): A

Explanation:

Since it is impossible to have one force unless it acts as one of a pair of forces, it means that these forces must be equal in magnitude and opposite in direction.



Which pendulum takes less time to make one complete back-and-forth swing?

  1. X
  2. Y
  3. Both take the same amount of time.
  4. There is not enough information to calculate the answer.

Answer(s): B

Explanation:

The length of time it takes for one all back and forth swing depends on the length of the string, not the weight at the end of it.



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.






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