CPS FREE CPS Firefighter Test Mechanical Aptitude Principles Questions and Answers 2

Question 1

A firefighter uses a Class 2 lever to lift a heavy hose bundle.
The fulcrum is at one end, the load is in the middle, and the effort is applied at the other end.
Compared to a Class 1 lever, this arrangement:

Accepted Answer

Multiplies force but reduces speed

Answer

Reduces force but increases speed

Answer

Always provides a mechanical advantage greater than 1

Answer

Provides no mechanical advantage

Question 2

Water flows through a 4-inch diameter supply hose into a 2-inch diameter attack hose. According to the continuity principle, the water speed in the attack hose will be:

Accepted Answer

Four times the speed in the supply hose

Answer

Half the speed in the supply hose

Answer

The same speed as in the supply hose

Answer

Twice the speed in the supply hose

Question 3

A hydraulic jack used to lift a vehicle has a small input piston with an area of 2 in² and a large output piston with an area of 20 in². If 50 lb of force is applied to the input piston, the output force is:

Accepted Answer

500 lb

Answer

5 lb

Answer

100 lb

Answer

1,000 lb

Question 4

A firefighter pulls a rope over a single fixed pulley to raise a 200 lb object. Ignoring friction, the effort force required is:

Accepted Answer

200 lb

Answer

50 lb

Answer

100 lb

Answer

400 lb

Question 5

Two gears are meshed together. Gear A has 12 teeth and Gear B has 36 teeth. If Gear A rotates at 120 RPM, Gear B rotates at:

Accepted Answer

40 RPM

Answer

360 RPM

Answer

120 RPM

Answer

10 RPM

Question 6

A firefighter on a ladder feels the rungs getting hotter as she climbs toward the roof. This heat transfer from rung to rung through the metal ladder is best described as:

Accepted Answer

Conduction

Answer

Convection

Answer

Radiation

Answer

Evaporation

A firefighter uses a Class 2 lever to lift a heavy hose bundle.The fulcrum is at one end, the load is in the middle, and the effort is applied at the other end.Compared to a Class 1 lever, this arrangement:

A firefighter uses a Class 2 lever to lift a heavy hose bundle.
The fulcrum is at one end, the load is in the middle, and the effort is applied at the other end.
Compared to a Class 1 lever, this arrangement: