FCTC Test Pulleys, Gears, and Levers Questions and Answers

Question 1

A firefighter is using a Halligan tool to pry open a door, with the door jamb acting as the fulcrum.
To generate the maximum prying force on the door (the load), where should the tool be positioned relative to the jamb?

Accepted Answer

So the distance between the jamb and the door edge is as short as possible.

Answer

So the distance between the firefighter's hands and the jamb is as short as possible.

Answer

Exactly in the middle of the tool's shaft, regardless of where the hands are.

Answer

As far away from the door jamb as possible to increase the swing.

Question 2

A small gear with 15 teeth is driving a larger gear with 60 teeth. Which of the following correctly describes the relationship between the two gears?

Accepted Answer

The large gear will rotate with four times the torque of the small gear.

Answer

The small gear has more torque than the large gear.

Answer

The large gear will rotate four times for every one rotation of the small gear.

Answer

Both gears will rotate at the same speed but in opposite directions.

Question 3

A rescue team is using a rope and pulley system to lift a 600-pound piece of equipment. Ignoring friction, which of the following systems would allow a rescuer to lift the load by pulling with approximately 150 pounds of force?

Accepted Answer

A system with a 4:1 mechanical advantage.

Answer

A single fixed pulley.

Answer

A system with a 2:1 mechanical advantage.

Answer

A system with four fixed pulleys.

Question 4

The large turntable gear on an aerial apparatus is rotated by a small pinion gear connected to a hydraulic motor. What is the primary mechanical principle behind this design?

Accepted Answer

It allows the small motor to generate the immense torque required to rotate the heavy ladder assembly.

Answer

It minimizes the amount of hydraulic fluid needed for operation.

Answer

It enables the ladder to rotate at very high speeds for rapid deployment.

Answer

It reduces the overall weight of the turntable mechanism.

Question 5

A firefighter uses a wheelbarrow to move heavy debris away from a building. The wheel's axle is the fulcrum, the debris is the load, and the firefighter lifts the handles to provide the effort. According to the principles of simple machines, what class of lever is a wheelbarrow?

Accepted Answer

Class 2 Lever

Answer

Class 3 Lever

Answer

Class 1 Lever

Answer

Compound Lever

Question 6

A pulley system is configured so that there are 5 rope segments directly supporting the load. If a firefighter needs to lift a 500-pound patient, what is the ideal force required to lift the load, assuming the system is frictionless?

Accepted Answer

100 pounds

Answer

500 pounds

Answer

250 pounds

Answer

125 pounds

A firefighter is using a Halligan tool to pry open a door, with the door jamb acting as the fulcrum.To generate the maximum prying force on the door (the load), where should the tool be positioned relative to the jamb?

A firefighter is using a Halligan tool to pry open a door, with the door jamb acting as the fulcrum.
To generate the maximum prying force on the door (the load), where should the tool be positioned relative to the jamb?