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Power Engineering - 4B1 Practice Questions With Complete Solutions

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Power Engineering - 4B1 Practice Questions With Complete Solutions

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Power Engineering - 4B1 Practice Questions With Complete
Solutions

A collar thrust bearing:

a. Can support more load than a Michell thrust bearing
b. Is an anti-friction type bearing
c. Is used with steam turbines only
d. Has boundary lubrication Correct Answers d. Has boundary
lubrication

A common cause of antifriction bearing failure is:

a. High RPM service
b. Extreme cold temperature cracking
c. Drive motor overload
d. Shaft misalignment Correct Answers d. Shaft misalignment

A form of lubrication that requires continual motion of a shaft or
surface is:

a. Boundary lubrication
b. Continuous lubrication
c. Forced lubrication
d. Fluid film lubrication Correct Answers d. Fluid film
lubrication

A journal bearing:

a. Controls thrust movement
b. Does not require lubrication

, c. Require cooling water
d. Supports a shaft Correct Answers d. Supports a shaft

A large journal bearing which is running hotter than normal can
be cooled by:

a. Direct application of cool water
b. Loosening the bearing caps
c. Decreasing the viscosity of the oil by cooling it
d. Pumping additional grease into it Correct Answers b.
Loosening the bearing caps

A material that is commonly used as a solid lubricant is:

a. Tallow
b. Lime
c. Molybdenum disulfide
d. Sodium carbonate Correct Answers c. Molybdenum disulfide

A normal anti-friction bearing temperature operating range is:

a. 150C to 160C
b. 20C to 50C
c. 65C to 70C
d. 80C to 120C Correct Answers c. 65C to 70C

A shell type bearing:

a. Is used for axial thrust
b. Is an anti-friction bearing
c. Consists of ball bearings in a shell

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