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

ASVAB ASVAB-SECTION-3 Online Questions & Answers

• Question 151:

  A single block-and-fall is called a __________.

  A. fixed pulley
  B. gun tackle
  C. runner
  D. sheave
  C. runner

  ---

  A single block-and-fall is called a runner.

• Question 152:

  

  In the figure shown above, what effort E must be applied to lift the cat?

  A. 7.0 pounds
  B. 9.0 pounds
  C. 21.0 pounds
  D. 10.5 pounds
  A. 7.0 pounds

  ---

  Apply the leverage formula: Length of Effort Arm divided by Length of Resistance Arm = Resistance Force divided by Effort Force. Or: 9 ÷ 3 = 21 ÷ E (effort force) 3 = 21 ÷ E 3E = 21 ÷ E × E 3E = 21 3E ÷ 3 = 21 ÷ 3 E = 7

• Question 153:

  In the pulley system below, how fast does pulley D rotate, if pulley A rotates at 50 rpm?

  

  A. 100 rpm
  B. 50 rpm
  C. 200 rpm
  D. 64 rpm
  C. 200 rpm

  ---

  A larger pulley causes a smaller pulley to rotate faster by the ratio of their diameters.

  If pulley A rotates at 50 rpm, then pulley B rotates at 50 × 8/5=80 rpm. Since C is directly connected to B it rotates at the same rate (80 rpm).

  Finally, pulley D will rotate at 80 rpm x 10/4 = 200 rpm

• Question 154:

  The term equilibrium is defined as __________.

  A. the state in which similar forces attract, causing a swell of movement in a single direction
  B. the principle describing the notion that every action must have a reaction
  C. the state in which opposing forces are balanced
  D. the presence of motion in the present day which serves as a means of understanding movement as a whole
  C. the state in which opposing forces are balanced

• Question 155:

  

  The weight of the load is being carried on the backs of the two cats shown in the figure. Which cat is carrying the most weight?

  A. Cat A
  B. Cat B
  C. Both are carrying an equal amount of weight.
  D. It can't be determined without more information.
  A. Cat A

  ---

  The load is closer to Cat A, so he's carrying the greater portion of the weight.

• Question 156:

  

  In the diagram shown above, the spring is very stiff and can be stretched 1 inch by a pulling force of 100 pounds. How much force must be applied to the block in order to move the box 3.5 inches to the left?

  A. 150 pounds
  B. 250 pounds
  C. 350 pounds
  D. 450 pounds
  C. 350 pounds

  ---

  3.5 inches multiplied by 100 pounds per inch equals 350 pounds.

• Question 157:

  The phrase "to adopt power" means __________ when working.

  A. to increase speed and efficiency to become your absolute best
  B. to use a forceful tone when discussing work with a coworker
  C. to focus energy on the lesser objects before moving on to larger instincts
  D. to work authoritatively and with a slim, fit physique
  A. to increase speed and efficiency to become your absolute best

• Question 158:

  The force that acts in an upward direction on anything submerged in a liquid or a gas is called __________.

  A. friction
  B. viscous drag
  C. gravity
  D. buoyancy
  D. buoyancy

  ---

  Buoyancy is the force that makes ships float and helium-filled balloons rise. This means that the force that acts in an upward direction on anything submerged in a liquid or a gas is called buoyancy.

• Question 159:

  The best definition for drag is __________.

  A. a responsive force that affects the movement of an object through a fluid
  B. a responsive force that only affects movement on a solid
  C. a responsive force that only affects movement in air
  D. the internal stretch force of a material
  A. a responsive force that affects the movement of an object through a fluid

• Question 160:

  There are three beams that are each 10 feet long and all of the same size. One is made of wood, another of steel, and the third of concrete. If identical loads are applied to these three beams, which of the following will occur?

  A. The steel beam will deflect less than the wood beam.
  B. The wood beam will deflect less than the concrete beam.
  C. The wood beam will deflect less than the steel beam.
  D. The concrete beam will deflect more than the other two.
  A. The steel beam will deflect less than the wood beam.

  ---

  The steel beam will deflect less than the wood beam. Choice a is not correct since the concrete beam will deflect less that the wood beam ?concrete is stiffer than wood.