WTMA Belt and Chain Drives 2

Question 1

An idler pulley in a belt drive system is primarily used to:

Accepted Answer

Maintain proper belt tension and prevent sagging

Answer

Increase the speed of the driven pulley

Answer

Reverse the direction of belt travel

Answer

Reduce friction between belt and pulley

Question 2

In a compound belt drive, power is transmitted through:

Accepted Answer

Multiple belts connecting intermediate shafts in sequence

Answer

A single belt connecting all pulleys at once

Answer

A chain and belt combination

Answer

Hydraulic coupling between pulleys

Question 3

Which type of chain is most commonly used for mechanical power transmission in machinery and bicycles?

Accepted Answer

Roller chain

Answer

Leaf chain

Answer

Bead chain

Answer

Coil chain

Question 4

The pitch of a chain is defined as the:

Accepted Answer

Center-to-center distance between adjacent link pins

Answer

Height of the chain links above the sprocket

Answer

Width of the chain measured across the links

Answer

Number of links per foot of chain length

Question 5

A step pulley (cone pulley) arrangement allows the operator to:

Accepted Answer

Change the speed ratio by moving the belt to different diameter steps

Answer

Automatically increase belt tension under load

Answer

Drive multiple machines simultaneously with one belt

Answer

Reverse the drive direction without stopping

Question 6

A 6-tooth sprocket drives a 24-tooth sprocket. The driven sprocket rotates at what fraction of the driver's speed?

Accepted Answer

One-quarter the speed

Answer

Four times faster

Answer

The same speed

Answer

One-half the speed

Question 7

What is a major disadvantage of belt drives compared to chain drives under heavy loads?

Accepted Answer

Belts can slip or creep under heavy or sudden loads

Answer

Belts require constant lubrication

Answer

Belt drives are significantly noisier

Answer

Belts are considerably more expensive to purchase