4B Power Engineering: Unit 1 - Lubrication and Bearings
Questions With Complete Solutions
4B01-02-02-06 The groove that is cut in the top half in the
lining of a shell bearing should not extend closer to the ends
than:
Select one:
a. 3 mm
b. 10 mm
c. 1.25 cm
d. 1.7 cm Correct Answers C
A collar thrust bearing:
1. Can support more load than a Michell thrust bearing
2. Can prevent a rotating shaft from moving in an axial direction
3. Has boundary lubrication
4. Is an antifriction type bearing
a. 1, 2, 3
b. 1,2,4
c. 2,3
d. 3,4
e. 1,2,3,4. Correct Answers C
A collar thrust bearing:
a. Must have a shiny surface
b. Can support more load than a Michell thrust bearing
c. Is an anti-friction type bearing
d. Is used with steam turbines only
e. Has boundary lubrication. Correct Answers E
A collar thrust bearing:
,Select one:
a. can support more load than a Mitchell thrust bearing
b. can prevent a rotating shaft from moving both axial directions
c. uses the fluid film lubrication principle
d. is an anti-friction type bearing Correct Answers b
A collar thrust bearing:
Select one:
a. is used with steam turbines only
b. can support more load than a Michell thrust bearing
c. is an anti-friction type bearing
d. use the boundary lubrication principle Correct Answers d
A common cause of anti-friction bearing failure is:
Select one:
a. High RPM service
b. Extreme cold temperature cracking
c. Broken drive belts
d. Drive motor overload
e. Shaft misalignment Correct Answers E
A common cause of antifriction bearing failure is:
Select one:
a. Shaft misalignment
b. Drive motor overload
c. Extreme cold temperature cracking
d. High RPM service Correct Answers a
A depth type oil filter consists of:
a. Columns of compressed paper
b. Pleat folded papers
,c. Loose packed fibrous material
d. Absorbent substances
e. Layers of foam material. Correct Answers C
A disadvantage of sodium based greases is:
Select one:
a. they are not suitable of temperatures above 70°C
b. they are not suitable for use in wet locations
c. they have a tendency to drip
d. they are not efficient at heat removal Correct Answers b
A form of lubrication that requires continual motion of a shaft or
surface is:
a. Boundary lubrication
b. Alemite fitting lubrication
c. Forced lubrication
d. Zerk fitting lubrication
e. Fluid film lubrication. Correct Answers E
A form of lubrication, which requires continual motion of a
shaft or surface, is:
Select one:
a. boundary lubrication
b. forced lubrication
c. controlled lubrication
d. fluid film lubrication Correct Answers d
A generally accepted maximum bearing temperature operating
range is:
Select one:
a. 150 to 165 °C
, b. 120 to 255 °C
c. 25 to 50 °C
d. 65 to 70 °C Correct Answers d
A journal bearing:
a. Controls thrust movement
b. Does not require lubrication
c. Improves suction pressure
d. Does not require a housing
e. Supports a shaft. Correct Answers E
A journal bearing:
Choose one answer.
a. Controls thrust movement
b. Does not require lubrication
c. Improves suction pressure
d. Does not require a housing
e. Supports a shaft Correct Answers E
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. Adding pour point depressant to the oil
e. Using CO2 vapor. Correct Answers B
A large journal bearing which is running hotter than normal can
be cooled by:
Choose one answer.
a. Direct application of cool water
Questions With Complete Solutions
4B01-02-02-06 The groove that is cut in the top half in the
lining of a shell bearing should not extend closer to the ends
than:
Select one:
a. 3 mm
b. 10 mm
c. 1.25 cm
d. 1.7 cm Correct Answers C
A collar thrust bearing:
1. Can support more load than a Michell thrust bearing
2. Can prevent a rotating shaft from moving in an axial direction
3. Has boundary lubrication
4. Is an antifriction type bearing
a. 1, 2, 3
b. 1,2,4
c. 2,3
d. 3,4
e. 1,2,3,4. Correct Answers C
A collar thrust bearing:
a. Must have a shiny surface
b. Can support more load than a Michell thrust bearing
c. Is an anti-friction type bearing
d. Is used with steam turbines only
e. Has boundary lubrication. Correct Answers E
A collar thrust bearing:
,Select one:
a. can support more load than a Mitchell thrust bearing
b. can prevent a rotating shaft from moving both axial directions
c. uses the fluid film lubrication principle
d. is an anti-friction type bearing Correct Answers b
A collar thrust bearing:
Select one:
a. is used with steam turbines only
b. can support more load than a Michell thrust bearing
c. is an anti-friction type bearing
d. use the boundary lubrication principle Correct Answers d
A common cause of anti-friction bearing failure is:
Select one:
a. High RPM service
b. Extreme cold temperature cracking
c. Broken drive belts
d. Drive motor overload
e. Shaft misalignment Correct Answers E
A common cause of antifriction bearing failure is:
Select one:
a. Shaft misalignment
b. Drive motor overload
c. Extreme cold temperature cracking
d. High RPM service Correct Answers a
A depth type oil filter consists of:
a. Columns of compressed paper
b. Pleat folded papers
,c. Loose packed fibrous material
d. Absorbent substances
e. Layers of foam material. Correct Answers C
A disadvantage of sodium based greases is:
Select one:
a. they are not suitable of temperatures above 70°C
b. they are not suitable for use in wet locations
c. they have a tendency to drip
d. they are not efficient at heat removal Correct Answers b
A form of lubrication that requires continual motion of a shaft or
surface is:
a. Boundary lubrication
b. Alemite fitting lubrication
c. Forced lubrication
d. Zerk fitting lubrication
e. Fluid film lubrication. Correct Answers E
A form of lubrication, which requires continual motion of a
shaft or surface, is:
Select one:
a. boundary lubrication
b. forced lubrication
c. controlled lubrication
d. fluid film lubrication Correct Answers d
A generally accepted maximum bearing temperature operating
range is:
Select one:
a. 150 to 165 °C
, b. 120 to 255 °C
c. 25 to 50 °C
d. 65 to 70 °C Correct Answers d
A journal bearing:
a. Controls thrust movement
b. Does not require lubrication
c. Improves suction pressure
d. Does not require a housing
e. Supports a shaft. Correct Answers E
A journal bearing:
Choose one answer.
a. Controls thrust movement
b. Does not require lubrication
c. Improves suction pressure
d. Does not require a housing
e. Supports a shaft Correct Answers E
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. Adding pour point depressant to the oil
e. Using CO2 vapor. Correct Answers B
A large journal bearing which is running hotter than normal can
be cooled by:
Choose one answer.
a. Direct application of cool water
