EIAT Mechanical Aptitude 5

Question 1

What is the primary purpose of lubrication in a mechanical system?

Accepted Answer

Reduce friction, prevent wear, and dissipate heat between moving parts

Answer

Lubrication creates a film between moving surfaces that reduces friction, minimizes wear, and carries away heat generated by contact.

Question 2

An inclined plane is 12 feet long and raises a load 3 feet high. Ignoring friction, what is the mechanical advantage?

Accepted Answer

4

Answer

Mechanical advantage of an inclined plane equals the length divided by the height: 12 ÷ 3 = 4.

Question 3

Which of the following would increase the tension in a drive belt to prevent slipping?

Accepted Answer

Adding a tensioner pulley or increasing center distance

Answer

A tensioner pulley or increasing center distance adds slack-side tension to the belt, improving the grip and preventing slippage.

Question 4

A solid steel shaft will resist twisting (torsion) better than a hollow shaft of the same outer diameter because:

Accepted Answer

The statement is false — a hollow shaft with the same outer diameter often resists torsion nearly as well per unit weight

Answer

A hollow shaft of equal outer diameter has nearly the same torsional rigidity as a solid one because material near the center contributes little to torsional resistance.

Question 5

When inspecting an elevator machine room, you notice oil leaking from a shaft seal. The FIRST corrective action should be:

Accepted Answer

Clean up the oil and identify the leak source before taking further action

Answer

The correct first step is to clean the area and identify the leak source to determine severity before deciding on the repair approach.

EIAT - Elevator Industry Aptitude Test Practice Test

EIAT - Elevator Industry Aptitude Test Practice Test

EIAT Mechanical Aptitude 5