EIAT Gears, Pulleys, and Levers 2

Question 1

A gear with 48 teeth meshes with a gear with 16 teeth. If the smaller gear rotates at 900 RPM, what is the speed of the larger gear?

Accepted Answer

300 RPM

Answer

Gear ratio is 48:16 = 3:1, so the larger gear turns at 900 ÷ 3 = 300 RPM.

Question 2

In a compound pulley system with 4 rope segments supporting the load, what is the mechanical advantage?

Accepted Answer

4

Answer

The mechanical advantage of a compound pulley equals the number of rope segments supporting the moving block.

Question 3

A first-class lever has the fulcrum between the effort and the load. Which everyday tool is an example?

Accepted Answer

Seesaw

Answer

A seesaw has the fulcrum in the middle with effort and load on opposite ends, making it a first-class lever.

Question 4

When two gears mesh, they always rotate in:

Accepted Answer

Opposite directions

Answer

Meshing gears always rotate in opposite directions because the teeth interlock and push against each other.

Question 5

A load of 200 lb is placed 2 feet from the fulcrum. How much effort is needed 8 feet from the fulcrum on the other side to balance it?

Accepted Answer

50 lb

Answer

Using lever balance: 200 × 2 = Effort × 8, so Effort = 400 ÷ 8 = 50 lb.

EIAT - Elevator Industry Aptitude Test Practice Test