Mechanical Aptitude Mechanical Aptitude Levers, Pulleys, and Gears Questions and Answers 3

Question 1

A wheelbarrow is an example of which class of lever?

Accepted Answer

Second-class lever

Answer

First-class lever

Answer

Third-class lever

Answer

It is not a lever

Question 2

A movable pulley is attached directly to a 120-pound load. How much force is needed to lift the load using a single movable pulley?

Accepted Answer

60 pounds

Answer

120 pounds

Answer

30 pounds

Answer

240 pounds

Question 3

If a driving gear with 15 teeth meshes with a driven gear with 45 teeth, what is the gear ratio?

Accepted Answer

3:1

Answer

1:3

Answer

15:1

Answer

1:15

Question 4

When using a lever, moving the fulcrum closer to the load will have what effect?

Accepted Answer

Increase mechanical advantage, requiring less effort

Answer

Decrease mechanical advantage, requiring more effort

Answer

Have no effect on the force required

Answer

Increase the distance the load travels

Question 5

In a block-and-tackle system with 6 rope segments supporting the load, how far must you pull the rope to raise the load 2 feet?

Accepted Answer

12 feet

Answer

6 feet

Answer

2 feet

Answer

3 feet

Question 6

An idler gear is placed between two other gears in a gear train. What effect does the idler gear have on the overall gear ratio?

Accepted Answer

It has no effect on the gear ratio

Answer

It doubles the gear ratio

Answer

It halves the gear ratio

Answer

It reverses the gear ratio