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

ASVAB ASVAB-SECTION-3 Online Questions & Answers

• Question 101:

  What is the primary difference between distillation and evaporation?

  A. Distillation separates or purifies liquids, while evaporation changes the form of a substance.
  B. One is intentional in scope, while the other occurs during other practices.
  C. Distillation involves the use of implements, while evaporation only requires heat.
  D. Distillation and evaporation have no primary difference; they are the same process.
  A. Distillation separates or purifies liquids, while evaporation changes the form of a substance.

• Question 102:

  

  If Gear 1 makes 10 complete clockwise revolutions per minute in the figure above, then __________.

  A. Gear 2 makes 10 complete clockwise revolutions per minute.
  B. Gear 2 makes 20 complete counterclockwise revolutions per minute.
  C. Gear 2 makes 5 complete counterclockwise revolutions per minute.
  D. Gear 3 keeps Gear 2 from making any revolutions.
  B. Gear 2 makes 20 complete counterclockwise revolutions per minute.

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  If Gear 1 turns at 10 rpm, then Gear 2, which is half the size, turns twice as fast at a rate of 20 rpm.

• Question 103:

  

  In the figure above, assume the valves are all closed. Which valves need to be open to fill the tank entirely?

  A. 1 and 2 only
  B. 1 only
  C. 1, 2, and 3
  D. 2 only
  A. 1 and 2 only

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  Valves 1 and 2 need to be open to fill the tank.

• Question 104:

  In the pulley system below, how fast does pulley D rotate, if pulley A rotates at 100 rpm?

  

  A. 25 rpm
  B. 50 rpm
  C. 100 rpm
  D. 12.5 rpm
  D. 12.5 rpm

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  A larger pulley causes a smaller pulley to rotate faster by the ratio of their diameters.

  If pulley A rotates at 100 rpm, then pulley B rotates at 100 × 4/10 = 40 rpm. Since C is directly connected to B it rotates at the same rate (40 rpm).

  Finally, pulley D will rotate at 40 rpm × 5/16 = 12.5 rpm

• Question 105:

  

  What mechanical advantage does the block and tackle arrangement in the above figure give?

  A. 1
  B. 3
  C. 2
  D. 4
  A. 1

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  A fixed, simple pulley gives no mechanical advantage, so its mechanical-advantage number is 1.

• Question 106:

  

  Which of the following is an example of a Class 1 Lever?

  A. Pliers
  B. Wheelbarrow
  C. Tongs
  D. Stapler
  A. Pliers

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  Pliers are an example of a Class 1 lever (actually 2 class 1 levers).

  Wheelbarrow and stapler are class 2.

  Tongs are class 3.

• Question 107:

  If a house key, a wooden spoon, a plastic hanger, and a wool jacket are all the same temperature, which one feels the coldest?

  A. key
  B. spoon
  C. hanger
  D. jacket
  B. spoon

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  The key will feel coldest because metal is a better conductor than the other materials.

• Question 108:

  What is the definition of a "concurrent force"?

  A. A force system requiring concurrent movement.
  B. A force system described as having multiple sources of force.
  C. A system requiring all systems to pass through the same point.
  D. A series of forces requiring simultaneous movement.
  C. A system requiring all systems to pass through the same point.

• Question 109:

  What determines the speed of an output gear?

  A. None of these (Gear speed is not capable of alteration.)
  B. The size of gears.
  C. The speed of the input gear and the ratio of the number of teeth on each gear.
  D. The ratio of companion gears.
  C. The speed of the input gear and the ratio of the number of teeth on each gear.

• Question 110:

  What would happen to a balloon full of air if you moved it from above a water surface to ten feet below the water surface?

  A. The balloon would explode.
  B. The volume of the balloon would decrease.
  C. The volume of the balloon would increase.
  D. The volume of the balloon would stay the same.
  B. The volume of the balloon would decrease.

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  The volume of the balloon would decrease. The pressure of the water would press inward on the balloon and cause it to shrink in volume.