EIAT Mechanical Comprehension 3

Question 1

A 2:1 roping arrangement in a traction elevator means:

Accepted Answer

The cab moves at half the speed of the rope

Answer

In 2:1 roping, the rope travels twice the distance the cab moves, so cab speed is half the rope speed but the tension in the ropes is halved.

Question 2

Kinetic energy is defined as:

Accepted Answer

Energy due to an object's motion

Answer

Kinetic energy (KE = ½mv²) is the energy an object possesses because of its velocity.

Question 3

Guide rails in an elevator hoistway serve to:

Accepted Answer

Keep the cab and counterweight aligned during travel

Answer

Guide rails constrain lateral movement of the cab and counterweight, keeping them aligned and stable throughout travel.

Question 4

Pascal's Law states that pressure applied to an enclosed fluid:

Accepted Answer

Is transmitted equally in all directions

Answer

Pascal's Law: pressure exerted on a confined fluid is transmitted undiminished in all directions throughout the fluid.

Question 5

Which type of rope construction is most commonly used for elevator hoisting ropes?

Accepted Answer

Independent wire rope core (IWRC)

Answer

IWRC wire ropes have superior resistance to crushing and maintain their shape under load, making them the standard for elevator hoisting.

EIAT - Elevator Industry Aptitude Test Practice Test