Sliding contact bearings , also called plain bearings have no problem of wear.

• True

• False

Scoring and pitting causes failure of bearings by damaging the working surfaces.

• True

• False

What is one common failure associated with Spherical Roller Bearings?

• Corrosion

• Loss of lubrication

• Improper lubrication

• Contamination

4. What is a common failure associated with Hydrodynamic Bearings?

• Loss of lubrication

• Contamination

• Corrosion

• Improper lubrication

What are five maintenance practices to ensure a bearing is in good working condition?

• Regular inspection, cleanliness, proper lubrication, correct installment and alignment, monitoring for excessive vibration or noise

• Periodic replacement, lubricant change, high-temperature operation, vibration analysis, noise reduction

• Regular lubrication, high-speed operation, misalignment correction, contamination prevention, noise reduction

• Visual inspection, lubricant change, high-speed operation, misalignment correction, noise reduction

6. Bearings should never be struck with a hammer.

• True

• False

Which of the following is not a type of failure in journal bearing?

• Abrasive wear

• Pitting

• Corrosion

• Distortion

Which type of lubricant is used in a bearing?

• Mineral oil

• Grease

• Graphite

• All of the listed

In a hydrodynamic lubricated bearing....

• there is a thin film of lubricant between the journal and the bearing.

• there is a thick film of lubricant between the journal and the bearing

• there is no lubricant between the journal and the bearing

• the lubricant is forced between the journal and the bearing, by external pressure

In hydrodynamic bearings.......

• require an external supply of lubricant

• the oil film is maintained by supplying oil under pressure

• the oil film pressure is generated only by the rotation of the journal

• grease is used for lubrication