EIAT - Elevator Industry Aptitude Gears, Pulleys, and Levers Questions and Answers

Question 1

A gear system is designed to increase torque. If the driving gear has 12 teeth, which of the following driven gears would provide the greatest increase in torque?

Accepted Answer

A gear with 48 teeth

Answer

A gear with 6 teeth

Answer

A gear with 12 teeth

Answer

A gear with 24 teeth

Question 2

In a pulley system with one fixed and one movable pulley supporting a load, what is the ideal mechanical advantage (IMA)?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 3

An elevator technician needs to pry open a stuck panel using a crowbar. To achieve the maximum prying force with the least effort, where should the fulcrum be placed?

Accepted Answer

As close as possible to the panel being pried

Answer

Exactly in the middle of the crowbar

Answer

As close as possible to the hand applying the effort

Answer

The fulcrum position does not affect the force

Question 4

Which of the following is an example of a third-class lever, where the effort is applied between the fulcrum and the load?

Accepted Answer

A fishing rod

Answer

A wheelbarrow

Answer

A pair of scissors

Answer

A bottle opener

Question 5

If a large gear with 60 teeth drives a small gear with 20 teeth, and the large gear makes one full rotation, how many rotations will the small gear make?

Accepted Answer

3 rotations

Answer

1/3 of a rotation

Answer

1 rotation

Answer

6 rotations

Question 6

A technician uses a pulley system to lift a 200 lb motor. If the technician only has to pull with 50 lbs of force, what is the actual mechanical advantage (AMA) of the pulley system?

Accepted Answer

4

Answer

2

Answer

5

Answer

150