ASVAB-SECTION-3 Online Practice Questions and Answers

If a first class lever with a resistance arm measuring 2 feet and an effort arm measuring 8 feet are being used, what's the mechanical advantage?

A. 2

B. 4

C. 6

D. 1

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

When the block-and-tackle arrangement shown in the figure above is used to lift a load, all the following parts remain stationary EXCEPT __________.

A. the upper hook

B. the upper block

C. the lower block

D. none; all the parts move

If Gear 1 makes 10 complete clockwise revolutions per minute in the figure above, then __________.

A. Gear 2 makes 10 complete clockwise revolutions per minute.

B. Gear 2 makes 20 complete counterclockwise revolutions per minute.

C. Gear 2 makes 5 complete counterclockwise revolutions per minute.

D. Gear 3 keeps Gear 2 from making any revolutions.

If Gear A is revolving in a clockwise manner, as seen in the figure above, Gear B ___________.

A. remains stationary

B. revolves in a clockwise manner

C. revolves in a counterclockwise manner

D. turns more slowly than Gear A

An above-ground suburban water tank holds 540 gallons of water when full.

If the tank starts out full and is drained at a rate of 60 gallons per minute, how many seconds will it take to empty out halfway?

A. 54

B. 240

C. 270

D. 480

In the illustration below, two 30-lbs blocks are attached to the ceiling using ropes, as shown.

Which of the following statements is true?

A. All the ropes are under equal amounts of tension.

B. The rope supporting Block A is under 2x the tension of the ropes holding Block B.

C. The ropes supporting Block B are under 1/3 of the tension of the rope holding Block A.

D. The rope holding Block A is under 1/3 of the tension of the ropes holding Block B.

If an object is in equilibrium, it is said to be __________.

A. at rest

B. moving

C. at rest or moving at a constant speed and in a straight line

D. moving upward only

In the figure, the angle b is important, since when it is __________.

A. 0 degrees the entire force is dragging the box

B. 90 degrees the entire force is lifting the box

C. both lifting and dragging between 10 degrees and 90 degrees

D. all of the above

What determines the speed of an output gear?

A. None of these (Gear speed is not capable of alteration.)

B. The size of gears.

C. The speed of the input gear and the ratio of the number of teeth on each gear.

D. The ratio of companion gears.