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

ASVAB ASVAB-SECTION-3 Online Questions & Answers

• Question 71:

  

  If a cat is removed from Side B of the seesaw, what happens to the cats on Side A?

  A. The cat will never move from Side B until it's good and ready.
  B. The cats on Side A will move up in the air.
  C. The cats on Side A will move toward the ground.
  D. Nothing will happen.
  C. The cats on Side A will move toward the ground.

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  Reducing the weight on Side B (by removing the cat) will cause Side A to move toward the ground.

• Question 72:

  Heat is a form of ___________.

  A. calories
  B. energy
  C. beneficence
  D. motion
  B. energy

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  Heat is a form of energy - Calories measure heat, beneficence is an attitude or emotion, and motion is something that can cause heat.

• Question 73:

  What mechanical motion principle do the brakes in a car or on a bicycle use?

  A. friction
  B. centrifugal force
  C. momentum
  D. acceleration
  A. friction

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  When the brakes are applied, the brake pads rub on the wheel and the frictional force of this rubbing slows down the vehicle.

• Question 74:

  Springs used in machines are usually made of __________.

  A. plastic
  B. bronze
  C. nylon fiber
  D. steel
  D. steel

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  Machine springs are usually made of steel although sometimes they're made of brass or other metal alloys.

• Question 75:

  How does oil function in a machine with a series of moving parts?

  A. Oil functions as a cleaning agent, allowing all moving parts to remain free of dirt and grime.
  B. Oil functions as a source of lubrication, allowing moving parts to function as a single unit.
  C. Oil serves as a fuel for moving parts in a machine.
  D. Oil provides a source of power when paired with fire.
  B. Oil functions as a source of lubrication, allowing moving parts to function as a single unit.

• Question 76:

  

  For Gear A and Gear B to mesh properly in the figure above __________.

  A. They must be the same size.
  B. They must turn at different rates.
  C. They must both turn in the same direction.
  D. Their teeth must be of equal size.
  D. Their teeth must be of equal size.

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  Gears of unequal size can mesh properly as long as their teeth are of equal size.

• Question 77:

  The sprocket on a bicycle is most similar to which of the simple mechanical devices listed below?

  A. a gear
  B. a spring
  C. a lever
  D. all of the above
  A. a gear

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  A bicycle sprocket is the classic example of a gear, which is defined as a toothed wheel or cylinder that meshes with a chain or with another toothed element to transfer energy or motion.

• Question 78:

  If you use a lever to lift a 200-pound weight with an effort of 40 pounds, with is the mechanical advantage?

  A. 4
  B. 0.2
  C. 8,000
  D. 5
  D. 5

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  Mechanical advantage = load/effort = 200/40 = 5

• Question 79:

  If two workers are carrying a single load with the assistance of a board or plane, how should the load be placed to ensure an entirely equitable division of effort?

  A. The load should be placed the same length from one side as the load is long; i.e. if the load is 3 feet wide, it should be placed 3 feet from the edge of the plane.
  B. The load should be placed directly in the middle of the board or plane to ensure equal labor division between workers.
  C. The cargo should be held directly, rather than placing strain on a board or plane.
  D. The load should be placed closer to one end to prevent bowing of the plane.
  B. The load should be placed directly in the middle of the board or plane to ensure equal labor division between workers.

• Question 80:

  The force produced when a boxer's hand hits a heavy bag and "bounces" off it is called __________.

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

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  Recoil occurs when an object producing a force is kicked back.