Millwright Certification Bearing Installation, Maintenance, and Failure Analysis 3

Question 1

What is the purpose of measuring shaft runout before installing a new bearing?

Accepted Answer

To verify the shaft is straight and within tolerance

Answer

To determine the bearing size needed

Answer

To calculate the required lubricant amount

Answer

To check the bearing internal clearance

Question 2

Which type of bearing is best suited for applications with combined radial and heavy thrust loads?

Accepted Answer

Tapered roller bearing

Answer

Deep groove ball bearing

Answer

Cylindrical roller bearing

Answer

Needle roller bearing

Question 3

What is the most likely cause of electrical fluting damage on bearing raceways?

Accepted Answer

Stray electrical currents passing through the bearing

Answer

Excessive vibration during operation

Answer

Improper lubrication viscosity

Answer

Bearing misalignment

Question 4

When installing a self-aligning bearing, what is the maximum angular misalignment typically permitted?

Accepted Answer

1 to 3 degrees

Answer

0.5 degrees

Answer

5 to 10 degrees

Answer

15 degrees

Question 5

What does a metallic grinding noise from a bearing most likely indicate?

Accepted Answer

Contamination or lack of lubrication

Answer

Normal operation under load

Answer

The bearing is properly preloaded

Answer

Thermal expansion is occurring

Question 6

Why is it important to record bearing clearance measurements before and after installation?

Accepted Answer

To verify the fit has reduced clearance to the correct operating range

Answer

To calculate the bearing's expected lifespan

Answer

To determine the shaft rotation speed

Answer

To select the appropriate lubricant