FCTC Test Pulleys, Gears, and Levers Questions and Answers 3

Question 1

A pulley system uses one fixed pulley and one movable pulley. How many rope segments support the movable block?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 2

Gear A has 20 teeth and drives Gear B with 20 teeth, which in turn drives Gear C with 40 teeth. What is the overall speed ratio from Gear A to Gear C?

Accepted Answer

1:2

Answer

1:1

Answer

2:1

Answer

4:1

Question 3

A Class 3 lever always has the effort applied between the fulcrum and the load. What is always true of a Class 3 lever?

Accepted Answer

MA is always less than 1, requiring more effort force than the load

Answer

MA is always greater than 1

Answer

MA always equals 1 regardless of dimensions

Answer

MA depends only on the weight of the load

Question 4

A worm gear system has a worm with 1 thread and a worm wheel with 40 teeth. The worm turns at 400 RPM. At what RPM does the worm wheel turn?

Accepted Answer

10 RPM

Answer

1 RPM

Answer

40 RPM

Answer

400 RPM

Question 5

A firefighter applies 80 lbs of force to a lever handle. The fulcrum is 6 inches from the load end and the handle is 24 inches long total. What is the mechanical advantage?

Accepted Answer

3

Answer

0.25

Answer

4

Answer

6

Question 6

Two intermeshed gears rotate in which direction relative to each other?

Accepted Answer

Opposite directions

Answer

The same direction

Answer

One rotates horizontally while the other rotates vertically

Answer

The direction depends only on the relative gear sizes