FREE Millwright Bearing Installation, Maintenance, and Failure Analysis Questions and Answers

Question 1

When using an induction heater to install a bearing, what is the generally recommended maximum temperature to avoid altering the bearing's metallurgy?

Accepted Answer

250°F (121°C)

Answer

150°F (65°C)

Answer

350°F (177°C)

Answer

450°F (232°C)

Question 2

A bearing raceway shows small, crater-like indentations equally spaced at the same distance as the rolling elements. What is the most likely cause of this failure?

Accepted Answer

True brinelling

Answer

False brinelling

Answer

Abrasive wear

Answer

Electrical fluting

Question 3

When re-lubricating a bearing with grease, what is the most critical factor to consider regarding the new and existing grease?

Accepted Answer

Thickener compatibility

Answer

Color

Answer

Dropping point

Answer

NLGI grade

Question 4

A bearing is marked with a 'C3' designation. What does this indicate?

Accepted Answer

It has a greater internal clearance than standard

Answer

It is a sealed bearing

Answer

It is made from corrosion-resistant steel

Answer

It has a lower load rating than standard

Question 5

When press-fitting a bearing onto a shaft, where should the installation force be applied?

Accepted Answer

Exclusively on the inner ring

Answer

Exclusively on the outer ring

Answer

Evenly across the entire face of the bearing

Answer

On the cage or separator

Question 6

Upon inspection, a reddish-brown or black oxide is found between the bearing bore and the shaft. This type of wear is most likely:

Accepted Answer

Fretting corrosion

Answer

Spalling

Answer

Pitting

Answer

Galvanic corrosion