Millwright Certification Power Transmission and Drive Systems

Question 1

What is the primary purpose of a V-belt drive in industrial machinery?

Accepted Answer

To transmit power between shafts using friction between the belt and sheave grooves

Answer

To provide electrical power to rotating machinery

Answer

To cool the motor during operation

Answer

To synchronize two shafts at identical speeds

Question 2

When installing a roller chain drive, the maximum allowable sag for a horizontal chain is typically:

Accepted Answer

1–2% of the center distance

Answer

5–10% of the center distance

Answer

10–15% of the center distance

Answer

No sag is permissible

Question 3

A gear ratio of 4:1 means the output shaft turns:

Accepted Answer

One revolution for every four revolutions of the input shaft

Answer

Four revolutions for every one revolution of the input shaft

Answer

At four times the torque of the input with equal speed

Answer

At the same speed but with four times the power

Question 4

What type of coupling is best suited for connecting two shafts with significant angular misalignment?

Accepted Answer

Gear coupling

Answer

Jaw coupling

Answer

Rigid flange coupling

Answer

Grid coupling

Question 5

Which belt drive arrangement is used to reverse the direction of the driven shaft?

Accepted Answer

Cross belt drive

Answer

Open belt drive

Answer

Compound belt drive

Answer

Quarter-turn belt drive

Question 6

When aligning a sheave on a shaft, which tool is most commonly used to check alignment between two sheaves?

Accepted Answer

Straight edge or laser alignment tool

Answer

Dial indicator

Answer

Feeler gauge

Answer

Micrometer