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

ASVAB ASVAB-SECTION-3 Online Questions & Answers

• Question 41:

  If a ramp measures 6 feet in length and 3 feet in height, an object weighing 200 pounds requires how much effort to move using the ramp?

  A. 200 pounds
  B. 100 pounds
  C. 50 pounds
  D. 300 pounds
  B. 100 pounds

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  The formula to determine mechanical advantage of an incline plane is Length of Ramp ?Height of Ramp = Weight of Object ?Effort. Plugging in the numbers gives you: 6/3 = 200/E 6E = 600 E = 100

• Question 42:

  A 130-pound woman is wearing shoes with high heels that measure 1-inch square.

  If the woman is standing on one heel, what psi does the heel exert as it rests on the ground? (Disregard atmospheric pressure from your calculations.)

  A. 130
  B. 65
  C. 260
  D. 11
  A. 130

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  Power = Force/Area. P = 130/1 = 130.

• Question 43:

  Universal joints are used to ___________.

  A. connect ball bearings
  B. fix two shafts so they don't pivot or rotate
  C. connect shafts in a U-shape
  D. couple two shafts set at different angles
  D. couple two shafts set at different angles

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  Universal joints are used to connect shafts that aren't in the same plane.

• Question 44:

  Which of the following statements is true for water flowing from a 4-inch pipe to a smaller 2-inch pipe?

  A. The same amount of water passes through both the 4-inch pipe and the 2-inch pipe.
  B. The pressure is greater in the 2-inch pipe.
  C. More water passes through the 4-inch pipe than through the 2-inch pipe.
  D. The pressure is lower in the 4-inch pipe.
  A. The same amount of water passes through both the 4-inch pipe and the 2-inch pipe.

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  Water cannot be compressed. Therefore, the same amount of water must be flowing through both the 4-inch pipe and the 2-inch pipe.

• Question 45:

  An axe is an example of what type of simple machine.

  A. Lever
  B. Inclined plane
  C. Wedge
  D. None of the above
  C. Wedge

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  An axe is a classic example of a wedge.

• Question 46:

  To move an object across a surface, which system requires little input from the user, yet creates extreme force?

  A. A conveyor belt, as those found in factories.
  B. Any form of mechanical device.
  C. wheel and axle system, as found in vehicles.
  D. A pulley system, as might be found in warehouses and shipyards.
  C. wheel and axle system, as found in vehicles.

• Question 47:

  A clutch is a type of __________.

  A. universal joint
  B. coupling
  C. gear differential
  D. cam follower
  B. coupling

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  Clutches connect and disconnect parts, so they're a type of coupling.

• Question 48:

  What determines the speed of a pulley system?

  A. The material used as the belt (such as leather and rubber).
  B. The size of the pulleys as a whole.
  C. The size and ratio of all pulleys involved.
  D. The length of the rope or belt used in the pulley system.
  C. The size and ratio of all pulleys involved.

• Question 49:

  The diagram below represents a load sliding down an incline. Which of the forces (A,B,C, or D) represent friction?

  

  A. A
  B. B
  C. C
  D. D
  D. D

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  Friction is represented by the force the resists the load moving down the hill.

• Question 50:

  In the figure below, if gear 1 turns counterclockwise (as shown by the arrow), which of the gears will also turn in the same direction?

  

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

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  Gear 1 turns counterclockwise causing gear 2 to turn clockwise which results in gear 3 and 4 to turn counterclockwise.