Firefighter Tools and Mechanical Reasoning 2

Question 1

Two gears are meshed together. If the driver gear turns clockwise, which way does the meshed driven gear turn?

Accepted Answer

Counterclockwise

Answer

Clockwise

Answer

It does not turn

Answer

Both directions alternately

Question 2

A firefighter uses a longer pry bar to lift a heavy beam. What does the longer handle primarily increase?

Accepted Answer

The mechanical advantage

Answer

The weight of the beam

Answer

The friction on the floor

Answer

The beam's density

Question 3

Which tool is best suited for forcing open an inward-swinging door during a fire rescue?

Accepted Answer

Halligan bar

Answer

Pipe wrench

Answer

Tin snips

Answer

Caulk gun

Question 4

In a pulley system with two supporting rope segments, lifting a 100 lb load ideally requires how much input force (ignoring friction)?

Accepted Answer

50 lb

Answer

200 lb

Answer

100 lb

Answer

25 lb

Question 5

Water flows through a hose that narrows at the nozzle. What happens to the water's velocity at the narrow point?

Accepted Answer

It increases

Answer

It decreases

Answer

It stays the same

Answer

It stops

Question 6

A screw is an example of which simple machine wrapped around a cylinder?

Accepted Answer

Inclined plane

Answer

Lever

Answer

Pulley

Answer

Wheel and axle

Question 7

Which property of a metal ladder makes it dangerous to use near electrical lines?

Accepted Answer

It conducts electricity

Answer

It floats on water

Answer

It melts easily

Answer

It rusts quickly