ASVAB ASVAB Certifications ASVAB-SECTION-3 Questions & Answers

• Question 151:

  To move a 400-pound crate from the floor of a warehouse to the bed of a truck 4-feet off the ground, the most efficient device to use is a __________.

  A. lever

  B. incline plane

  C. fixed pulley

  D. jackscrew

  Correct Answer: B

  To move a heavy object a few feet in height, the incline plane is the most efficient device (of those listed) to use.

• Question 152:

  Torsion springs __________.

  A. produce a direct pull

  B. exert no pull

  C. produce a twisting action

  D. coil but do not uncoil

  Correct Answer: C

  Torsion springs coil or uncoil and produce a twisting action, not a direct pull.

• Question 153:

  

  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.

  Correct Answer: D

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

• Question 154:

  Normally, atmospheric pressure is approximately __________.

  A. 14.7 psi

  B. 23.2 psi

  C. 7.0 psi

  D. 10.1 psi

  Correct Answer: A

  "Normal" atmospheric pressure is 14.7 psi.

• Question 155:

  The force produced when two objects rub against each other is called __________.

  A. gravity

  B. recoil

  C. magnetism

  D. friction

  Correct Answer: D

  Objects rubbing together produce friction.

• Question 156:

  

  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.

  Correct Answer: C

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

• Question 157:

  

  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

  Correct Answer: B

  The Cat B will move towards the ground.

• Question 158:

  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

  Correct Answer: B

  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 159:

  A micrometer is used to measure ___________.

  A. small changes in temperature

  B. changes in psi

  C. thicknesses to a few thousandths of an inch

  D. objects invisible to the unaided eye

  Correct Answer: C

  Micrometers measure very small but not microscopic objects.

• Question 160:

  If a force of 200 pounds is exerted over an area of 10-square inches, what's the psi?

  A. 10

  B. 15

  C. 20

  D. 200

  Correct Answer: C

  You can calculate psi as Pressure = Force/Area. So, in this problem, P = 200/10 = 20.