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

ASVAB ASVAB-SECTION-3 Online Questions & Answers

• Question 141:

  

  In the figure above, if Cat A moves toward the middle of the seesaw to get a better look at the mouse, Cat B will __________.

  A. remain stationary
  B. move toward the ground
  C. rise in the air
  D. instigate a cat fight
  B. move toward the ground

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  The Cat B will move towards the ground.

• Question 142:

  If a ramp is 8-feet long and 4-feet high, how much effort is required to move a 400-pound object up the ramp?

  A. 35 pounds
  B. 150 pounds
  C. 800 pounds
  D. 200 pounds
  D. 200 pounds

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  The formula to determine the mechanical advantage of an incline plane is Length of Ramp ÷ Height of Ramp = Weight of Object ÷ Effort. 8 ÷ 4 = 400 ÷ E 8⁄4 = 400⁄E 8E = 1,600 8E⁄8 = 1,600⁄8 E = 200

• Question 143:

  A way to determine the amount of power being used is to __________.

  A. Multiply the amount of work done by the time it takes.
  B. Multiply the distance covered by the time it takes to move a load.
  C. Divide the amount of work done by 550 pounds per second.
  D. Divide the amount of work done by the amount of time it takes.
  D. Divide the amount of work done by the amount of time it takes.

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  The formula for determining power is Power = Work ÷ Time.

• Question 144:

  Which is the best description of centrifugal force?

  A. the force responsible for the changes made to water during distillation.
  B. the response of bodies with inertia to the straight-moving or curved behavior of their container.
  C. the force by which bodies are propelled forward.
  D. the relationship between two opposing forces.
  B. the response of bodies with inertia to the straight-moving or curved behavior of their container.

• Question 145:

  A screw consists of a single continuous spiral wrapped around a __________.

  A. piston
  B. cylinder
  C. helix
  D. square
  B. cylinder

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  A screw is a simple device. It has been used for centuries as a means of lifting water out of wells and over the banks of irrigation canals. A screw consists of a single continuous spiral wrapped around a cylinder. The threads are cut into a rod in a spiral and make it possible to use the holding power of the screw in fastening objects together.

• Question 146:

  A string of six gears exists, with each gear turning in conjunction with one another.

  Which gears operate in the same rotation?

  A. Gears 1, 2, and 3
  B. Gears 1, 3, and 5
  C. Gears 3, 4, and 5
  D. Gears 2, 4, and 5
  B. Gears 1, 3, and 5

• Question 147:

  The ideal mechanical advantage of a gear is the ratio of the number of teeth in the load gear to the number of teeth in the __________.

  A. effort gear
  B. loaded gear
  C. lifting gear
  D. spiral gear
  A. effort gear

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  In mechanical devices, gears are used to change torque. The ideal mechanical advantage of a gear is the ratio of the number of teeth in the load gear to the number of teeth in the effort gear.

• Question 148:

  

  If both Wheel A and Wheel B revolve at the same rate in the figure above, Wheel A will cover a linear distance of 12 feet __________.

  A. faster than Wheel B
  B. slower than Wheel B
  C. in about the same time as Wheel B
  D. half as quickly as Wheel B
  A. faster than Wheel B

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  Wheel B has to make more revolutions to cover the same ground as Wheel A, so it will cover the distance more slowly.

• Question 149:

  Which pendulum takes less time to make one complete back-and-forth swing?

  

  A. X
  B. Y
  C. Both take the same amount of time.
  D. There is not enough information to calculate the answer.
  B. Y

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  The length of time it takes for one all back and forth swing depends on the length of the string, not the weight at the end of it.

• Question 150:

  A good example of a simple machine is a __________.

  A. manually operated pencil sharpener
  B. doorknob
  C. light switch
  D. all of the above
  D. all of the above

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  Simple machines are devices that make work easier.

  Some examples of simple machines are levers, hydraulic jacks, loading ramps, vises, and machines that spin ?winches and gears. Door knobs, light switches, and manually operated pencil sharpeners are also simple machines.