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Lubrication interview questions
Lubrication interview questions
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Total Questions: 15
1. Select the incorrect statement from the following option.
A. Lubricant keep out dirt
B. Lubricant act as a seal
C. Lubricant transmit fluid power
D. Lubricant enhance corrosion
Show Correct Answer
Correct Answer is :
Lubricant enhance corrosion
2. The viscosity of petroleum oil for hydraulic lifts is
A. High
B. Low
C. Moderate
D. Very high
Show Correct Answer
Correct Answer is :
Low
3. The science of friction, lubrication and wear is called
A. Endiology
B. Geology
C. Tribology
D. Morphology
Show Correct Answer
Correct Answer is :
Tribology
4. On increasing the lubrication, the efficiency of the machine
A. Increases
B. Decreases
C. Remain same
D. Does not get affected
Show Correct Answer
Correct Answer is :
Increases
5. The stearate ion has a ________ carbons long hydrocarbon chain.
A. 17
B. 19
C. 21
D. 23
Show Correct Answer
Correct Answer is :
17
6. How many mechanisms are there for lubrication?
A. 1
B. 2
C. 3
D. 4
Show Correct Answer
Correct Answer is :
3
7. The thickness of the lubricant film in the hydro dynamic lubrication is about __________
A. 1000oA
B. 5000oA
C. 500oA
D. 100oA
Show Correct Answer
Correct Answer is :
1000oA
8. The liquid lubricants stick due to the _________ property.
A. Surface tension
B. Viscosity
C. Temperature coefficient
D. Mass of the liquid
Show Correct Answer
Correct Answer is :
Viscosity
9. The coefficient of friction of unlubricated surface ranges about _________
A. 0.1-1.5
B. 0.1-0.5
C. 0.1-1.0
D. 1.5-2.0
Show Correct Answer
Correct Answer is :
0.1-1.5
10. The effectiveness of the hydro dynamic lubrication does not depends upon the ________
A. Design of bearing
B. Load
C. Rate of rotation of shaft
D. Area of shaft
Show Correct Answer
Correct Answer is :
Area of shaft
11. The continuous fluid film cannot be maintained between the rubbing surfaces under the condition such as high load in boundary lubrication.
A. TRUE
B. FALSE
C.
D.
Show Correct Answer
Correct Answer is :
TRUE
12. In boundary lubrication, the coefficient of friction ranges about ______
A. 0.05-0.1
B. 0.5-0.15
C. 0.05-0.15
D. 1-1.5
Show Correct Answer
Correct Answer is :
0.05-0.15
13. The wear and tear of metal surfaces are involved and _________ are formed in thin lubrication.
A. P-n junctions
B. Welded junctions
C. Layers
D. Thin layers
Show Correct Answer
Correct Answer is :
Welded junctions
14. Generation of heat takes place in __________ lubrication.
A. Thin lubrication
B. Thick lubrication
C. Extreme pressure lubrication
D. Boundary lubrication
Show Correct Answer
Correct Answer is :
Extreme pressure lubrication
15. The liquid lubricant may be _______
A. Boiled
B. Evaporated
C. Sublimated
D. Heated
Show Correct Answer
Correct Answer is :
Evaporated
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