FCTC Test Pulleys, Gears, and Levers Questions and Answers 2

Question 1

A fixed pulley is used to redirect a rope. A firefighter pulls down with 100 lbs of force. How much weight can be lifted?

Accepted Answer

100 lbs

Answer

50 lbs

Answer

200 lbs

Answer

400 lbs

Question 2

A two-gear set has a driver gear with 30 teeth and a driven gear with 60 teeth. If the driver gear turns at 200 RPM, at what RPM does the driven gear turn?

Accepted Answer

100 RPM

Answer

200 RPM

Answer

400 RPM

Answer

600 RPM

Question 3

A Class 2 lever has the load between the fulcrum and the effort. If the load is 150 lbs and the mechanical advantage is 3, how much effort is required?

Accepted Answer

50 lbs

Answer

30 lbs

Answer

75 lbs

Answer

150 lbs

Question 4

Three equal weights hang from a balanced beam. Two hang 2 feet from the fulcrum on the left side and one hangs on the right side. How far from the fulcrum must the single weight hang to balance the beam?

Accepted Answer

4 feet

Answer

1 foot

Answer

2 feet

Answer

6 feet

Question 5

A compound gear train has a first stage ratio of 4:1 and a second stage ratio of 3:1. What is the total gear reduction?

Accepted Answer

12:1

Answer

7:1

Answer

16:1

Answer

24:1

Question 6

A fulcrum is placed at the exact midpoint of a lever. A 200-lb load is on one end. What force is needed at the other end to lift the load?

Accepted Answer

200 lbs

Answer

50 lbs

Answer

100 lbs

Answer

400 lbs