CPM Bearings, Seals, and Shaft Couplings

Question 1

What type of rolling element bearing is best suited to handle both high radial loads and moderate axial (thrust) loads simultaneously?

Accepted Answer

Tapered roller bearing

Answer

Tapered roller bearings have angled rolling elements that redirect forces so the bearing supports both radial and axial loads simultaneously.

Question 2

When pressing a bearing onto a shaft, force should be applied to which component to avoid damaging the rolling elements?

Accepted Answer

The inner ring only

Answer

Force applied to the inner ring transfers directly to the shaft interface; applying it elsewhere passes load through the rolling elements and damages them.

Question 3

What does a high-pitched squealing or screeching sound from a bearing most commonly indicate?

Accepted Answer

Inadequate lubrication causing metal-to-metal contact

Answer

High-pitched squealing is the classic audible sign of insufficient lubrication, where friction between rolling elements and races generates the noise.

Question 4

The internal clearance of a bearing refers to:

Accepted Answer

The total radial movement possible between the inner and outer rings when unloaded

Answer

Internal clearance (radial play) is the total free radial movement between inner and outer rings before load is applied, and it affects heat generation and load distribution.

Question 5

Which bearing type is specifically designed to automatically compensate for shaft misalignment of several degrees?

Accepted Answer

Self-aligning ball bearing

Answer

Self-aligning ball bearings have a spherical outer raceway that allows the inner ring and balls to tilt, accommodating misalignment without binding.

CPM - Certified Plant Mechanic Practice Test

CPM - Certified Plant Mechanic Practice Test

CPM Bearings, Seals, and Shaft Couplings