ASVAB ASVAB Certifications ASVAB-SECTION-3 Questions & Answers

• Question 131:

  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

  Correct Answer: A

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

• Question 132:

  33,000 foot-pounds of work done in one minute is called ___________.

  A. a job for an enlisted soldier

  B. one horsepower

  C. 330 psi

  D. meaningful force

  Correct Answer: B

  Scientists agree that 33,000 foot-pounds per minute is one horsepower.

• Question 133:

  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

  Correct Answer: D

  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 134:

  

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

  A. 1

  B. 3

  C. 2

  D. 4

  Correct Answer: A

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

• Question 135:

  

  What effort must be used to lift a 30-pound cat (see the figure above) using a first-class lever? (Don't include the weight of the lever in your calculations.)

  A. 10 pounds

  B. 15 pounds

  C. 50 pounds

  D. 5 pounds

  Correct Answer: A

  E stands for effort needed. 30 (weight of the cat) × 2 (length of resistance arm) = x × 6 (length of effort

  arm). Do a little multiplication, and you get 60 = 6x.

  To isolate x, divide each side by 6:

  60 ÷ 6 = 6x ÷ 6, or 10 = x.

• Question 136:

  Wheel A has a diameter of 10 feet. Wheel B has a diameter of 8 feet.

  If both wheels revolve at the same rate, Wheel B will cover a linear distance of 16 feet ___________.

  A. at the same time as Wheel A

  B. more slowly than Wheel A

  C. in twice the time as Wheel A

  D. faster than Wheel A

  Correct Answer: B

  Wheel B has to make more revolutions than Wheel A to cover the same amount of distance, so it will go slower.

• Question 137:

  

  In the figure above, which pillar supports the greater load of the cat?

  A. Pillar A

  B. Pillar B

  C. Both pillars support the cat equally.

  D. It's impossible to determine from the information given.

  Correct Answer: B

  The cat is closer to Pillar B, so Pillar B bears more weight.

• Question 138:

  Helical gears have ___________.

  A. straight teeth

  B. slanted teeth

  C. teeth of unequal size

  D. no advantage over spur gears

  Correct Answer: B

  The teeth of helical gears are slanted.

• Question 139:

  

  In the figure shown above, the board holds the weight of the cat. The board is placed on two identical scales.

  Each scale reads ___________.

  A. 24

  B. 10

  C. 12

  D. 40

  Correct Answer: C

  The 20-pound cat and the 4-pound board weigh 24 pounds total or, divided by 2, 12 pounds per scale.

• Question 140:

  If a water tank on a toilet keeps overflowing, the problem is probably a ___________.

  A. defective float

  B. clogged pipe

  C. crimped chain

  D. improper seal

  Correct Answer: A

  The float measures the water level in the tank. If the tank overflows, the float is probably defective.