ASVAB ASVAB-SECTION-3 Online Practice Questions and Exam Preparation

ASVAB ASVAB-SECTION-3 Online Questions & Answers

• Question 171:

  In the figure below, if gear A turns 15 times, how many revolutions will gear B make?

  

  A. 15 revolutions
  B. 5 revolutions
  C. 30 revolutions
  D. 45 revolutions
  D. 45 revolutions

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  Gear A has 18 teeth and gear B has 6 teeth. Therefore, for every 1 revolution of gear A, gear B will have 3 revolutions.

• Question 172:

  

  The floats in Tubes A and B measure specific gravity.

  Which tube contains the liquid with the higher specific gravity?

  A. Tube A
  B. Tube B
  C. It can't be determined.
  D. Both Tube A and Tube B have the same specific gravity.
  B. Tube B

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  Specific gravity is a comparison between the weight of a liquid and the weight of water. The liquid with the higher specific gravity will have a float that rises higher.

• Question 173:

  

  The baskets are balanced on the arm in the figure above. If cherries are removed from Basket B, to rebalance the arm __________.

  A. The fulcrum will have to be moved to the right.
  B. Basket B will have to be moved to the right.
  C. Basket A will have to be moved to the left.
  D. Basket A will have to be moved to the right.
  D. Basket A will have to be moved to the right.

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  Moving Basket A to the right counterbalances the loss of cherries from Basket B.

• Question 174:

  When meshing or interlocking gears have different numbers of teeth, __________.

  A. relative speeds depend on the speed of the drive aide for both
  B. both gears will rotate at the same speed
  C. the gear with more teeth will rotate fester than the gear with fewer teeth
  D. the gear with fewer teeth will rotate fester than the gear with more teeth
  D. the gear with fewer teeth will rotate fester than the gear with more teeth

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  When meshing or interlocking gears have different numbers of teeth, the gear with fewer teeth will rotate faster than the gear with more teeth. If two gears are meshed, both cannot be driven or something will break – one must be driving and one must be driven.

• Question 175:

  

  In the figure above, which angle is braced most solidly?

  A. A
  B. B
  C. C
  D. All are braced equally solidly.
  A. A

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  The brace on Angle A covers more area of the angle, so it's more solidly braced.

• Question 176:

  The gas gauge in an auto relies on what mechanical device to measure the amount of gas in the tank?

  A. ball and cock
  B. automatic valve
  C. float
  D. mechanical switch
  C. float

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  A float indicates the level of liquid in a container.

• Question 177:

  A simple pulley gives a mechanical advantage of __________.

  A. 2
  B. 3
  C. 1
  D. unknown
  C. 1

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  A simple pulley gives no mechanical advantage, although it does make work easier by spreading out the work needed over several tries. So the mechanical advantage is 1.

• Question 178:

  Torsion springs __________.

  A. produce a direct pull
  B. exert no pull
  C. produce a twisting action
  D. coil but do not uncoil
  C. produce a twisting action

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  Torsion springs coil or uncoil and produce a twisting action, not a direct pull.

• Question 179:

  

  The pressure gauge in the figure above shows a reading of __________.

  A. 15.0
  B. 19.5
  C. 21.0
  D. 23.0
  C. 21.0

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  The gauge shows a reading of 21.

• Question 180:

  Cranks are used to __________.

  A. convert motion in a circle into motion in a straight line
  B. convert motion in a straight line into motion in a circle
  C. attach to rotating shafts to push separate pieces in a given direction
  D. transfer power between rotating shafts of different diameters
  B. convert motion in a straight line into motion in a circle

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  Cranks are used to convert motion in a straight line into motion in a circle, such as in a bicycle's pedals and pistons in an automotive engine.