mechanical comprehension exam 1

Front

An induction clutch works by?

(A) magnetism.

(B) pneumatics.

(C) hydraulics.

(D) friction.

Back

magnetism

Front

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

(A) 2

(B) 4

(C) 6

(D) 1

Back

4

Front

The bottoms of four boxes are shown below. The boxes all have the same volume. If postal regulations state that the sides of a box must meet a minimum height, which box is most likely to be too short to go through the mail?

Back

No. 3

Front

Looking at the figure below, when Anvil B lands on the seesaw, Anvil A will?

(A) remain stationary.

(B) hit the ground hard.

(C) rise in the air quickly.

(D) enter the stratosphere.

Back

rise in the air quickly.

Front

Air pressure at sea level is about 15 psi. What’s the amount of force exerted on the top of your head, given a surface area of 24 square inches?

(A) 360 pounds

(B) 625 pounds

(C)

(D) 180 pounds

Back

360 pounds

Front

The force produced when a boxer’s hand hits a heavy bag and “bounces” off it is called?

(A) response time.

(B) bounce.

(C) recoil.

(D) gravity.

Back

recoil.

Front

In the figure below, if Gear 1 has 25 teeth and Gear 2 has 15 teeth, how many revolu tions does Gear 2 make for every 10 revolu tions Gear 1 makes?

Back

about 16 and 1 over 3

Front

A cubic foot of water weighs about 62.5 pounds. If an aquarium is 18 feet long, 10 feet deep, and 12 feet wide, what’s the approximate pressure in pounds per square inch (psi) on the bottom of the tank?

Back

4 psi

Front

Springs used in machines are usually made of?

Back

steel.

Front

A clutch is a type of?

Back

coupling.