OAR OAR Mechanical Reasoning 5

Question 1

A cam converts rotational motion into which type of motion?

Accepted Answer

Reciprocating (back-and-forth) linear motion

Answer

Rotational motion at a different speed

Answer

Circular motion in the opposite direction

Answer

Oscillating pendulum motion

Question 2

A 500 N load is lifted using a ramp that is 5 m long and 1 m high. Ignoring friction, what effort force is required to push the load up the ramp?

Accepted Answer

100 N

Answer

50 N

Answer

250 N

Answer

500 N

Question 3

Which of the following is the BEST conductor of electricity?

Accepted Answer

Copper

Answer

Carbon

Answer

Silicon

Answer

Iron

Question 4

A pitch propeller creates thrust by pushing water backward. If a propeller's pitch is 12 inches, it theoretically advances how far per revolution?

Accepted Answer

12 inches

Answer

1 inch

Answer

6 inches

Answer

24 inches

Question 5

A sound wave travels from air into water. Its speed will:

Accepted Answer

Increase because water transmits sound better

Answer

Decrease because water is denser

Answer

Stay the same as in air

Answer

Become zero since water absorbs sound

Question 6

A wrench slips off a bolt head because the wrench opening is slightly too large. This is most likely to cause:

Accepted Answer

The bolt head to round off (strip)

Answer

The bolt to over-tighten

Answer

The wrench handle to bend

Answer

No damage if turned slowly

Question 7

A flywheel stores energy as rotational kinetic energy. Doubling its rotational speed will change its stored energy by a factor of:

Accepted Answer

4 (quadruples)

Answer

2 (doubles)

Answer

8 (octuples)

Answer

0.5 (halves)