FCTC Test Pulleys, Gears, and Levers 1

Question 1

A movable pulley is used to lift a 240-lb load. Ignoring friction, how much force must be applied to the rope?

Accepted Answer

120 lb

Answer

240 lb

Answer

60 lb

Answer

480 lb

Question 2

Gear X has 20 teeth and Gear Y has 80 teeth. If Gear X rotates at 160 RPM, how fast does Gear Y rotate?

Accepted Answer

40 RPM

Answer

640 RPM

Answer

80 RPM

Answer

20 RPM

Question 3

A lever has an effort arm of 6 feet and a resistance arm of 2 feet. What is the mechanical advantage?

Accepted Answer

3

Answer

12

Answer

4

Answer

2

Question 4

A block-and-tackle system applies 50 lbs of effort through 6 rope segments supporting the load. What is the maximum load that can be lifted, ignoring friction?

Accepted Answer

300 lb

Answer

8 lb

Answer

56 lb

Answer

600 lb

Question 5

Which of the following is an example of a third-class lever?

Accepted Answer

Fishing rod

Answer

Wheelbarrow

Answer

Crowbar

Answer

Bottle opener

Question 6

Two meshed gears have a gear ratio of 4:1 (driver to driven). If the driver gear produces 10 lb-ft of torque, what torque does the driven gear produce, ignoring friction?

Accepted Answer

40 lb-ft

Answer

2.5 lb-ft

Answer

10 lb-ft

Answer

14 lb-ft