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

ASVAB ASVAB-SECTION-3 Online Questions & Answers

• Question 181:

  

  If Gear A turns left in the figure above, Gear B __________.

  A. won't turn
  B. turns left
  C. turns right
  D. It can't be determined.
  C. turns right

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  Gears in mesh always turn in opposite directions.

• Question 182:

  On a bicycle there are 30 teeth on the gear sprocket connected to the pedals, and 10 teeth on the sprocket connected to the rear wheels. If you pedal the bike 12 times, how many times will the rear wheel turn?

  A. 4 times
  B. 12 times
  C. 24 times
  D. 36 times
  D. 36 times

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  Since there are 30 teeth on the pedal sprocket, but only 10 teeth on the rear wheel, each revolution of the pedal will turn the rear wheel 3 times. So 12 revolutions will turn the rear wheel 36 times.

• Question 183:

  In the illustration below, two 30-lbs blocks are attached to the ceiling using ropes, as shown.

  Which of the following statements is true?

  

  A. All the ropes are under equal amounts of tension.
  B. The rope supporting Block A is under 2x the tension of the ropes holding Block B.
  C. The ropes supporting Block B are under 1/3 of the tension of the rope holding Block A.
  D. The rope holding Block A is under 1/3 of the tension of the ropes holding Block B.
  C. The ropes supporting Block B are under 1/3 of the tension of the rope holding Block A.

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  There are three ropes supporting Block B; therefore, they are under 1/3 the tension as the rope supporting Block A.

• Question 184:

  Work input is always more than work output because of __________.

  A. gravity
  B. buoyancy
  C. friction
  D. tension
  C. friction

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  Efficiency is affected by friction. It is a ratio of how much effort went into a job compared to what was produced or outputted. Therefore, work input is more than the work output. Friction accounts for the loss in efficiency.

• Question 185:

  What is the function of a vise in mechanical applications?

  A. In mechanical applications, vises are used to arrest motion.
  B. Vises are used to suspend quick movements, slowing the effects of conveyor belts.
  C. In mechanical applications, vises are designed to assist movement.
  D. Vises are designed to function as a source of stability, much like how legs function beneath a table.
  A. In mechanical applications, vises are used to arrest motion.

• Question 186:

  Which of the other gears is moving in the opposite direction from Gear 1?

  

  A. Gear 2
  B. Gear 3
  C. Both Gears 2 and 3
  D. Neither Gear 2 or 3
  A. Gear 2

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  Meshed gears turn in opposite directions.

  Gear 1 is turning clockwise; therefore. Gear 2 is turning counterclockwise (the opposite direction from Gear 1) and Gear 3 is turning clockwise (the same direction as Gear l).

• Question 187:

  In the figure below, what is true about supports A and B?

  

  A. The load is equal for both supports
  B. Support A carries more weight
  C. Support B carries more weight
  D. Not enough information
  C. Support B carries more weight

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  Since the load is closer to support B, support B carries more weight.

• Question 188:

  The force that causes clothes from the dryer to stick together is called ___________.

  A. gravity
  B. magnetism
  C. friction
  D. static electricity
  D. static electricity

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  Static electricity causes materials to "stick" together this way.