IC Engine Questions and Answers – Mechanism of Lubrication

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This set of IC Engine Interview Questions and Answers for freshers focuses on “Mechanism of Lubrication”.

1. Lubrication is the admittance of oil between two surfaces having relative motion.
a) True
b) False
View Answer

Answer: a
Explanation: None.
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2. The objective of lubrication is to reduce friction between the parts having relative motion.
a) True
b) False
View Answer

Answer: a
Explanation: None.

3. The objective of lubrication is to reduce wear of the moving parts.
a) True
b) False
View Answer

Answer: a
Explanation: None.

4. The objective of lubrication is to cool the surfaces by carrying away heat generated due to friction.
a) True
b) False
View Answer

Answer: a
Explanation: None.

5. The objective of lubrication is to absorb shocks between bearings and other parts and consequently reduce noise.
a) True
b) False
View Answer

Answer: a
Explanation: None.
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6. The objective of lubrication is to reduce dirt and girt that might have crept between the rubbing parts.
a) True
b) False
View Answer

Answer: a
Explanation: None.

7. A slippery bearing material is not desirable during starting and stopping, but once the oil film is established the bearing material is less important.
a) True
b) False
View Answer

Answer: b
Explanation: Actually, a slippery bearing material is desirable during starting and stopping, but once the oil film is established the bearing material is less important.

8. ____________ is the speed of journal, more will be the oil pulled into the apex of the wedge of oil in the clearances space.
a) Lower
b) Higher
c) Constant
d) None of the mentioned
View Answer

Answer: b
Explanation: None.

9. An increase in supporting pressure will ____________ the oil film thickness, and decreases the eccentricity.
a) increases
b) decreases
c) remains same
d) none of the mentioned
View Answer

Answer: a
Explanation: None.
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10. If the eccentricity is decreased, the supporting pressure must ____________
a) increase
b) decrease
c) remains same
d) none of the mentioned
View Answer

Answer: b
Explanation: If the eccentricity is decreased, the supporting pressure must decrease because the sides of the wedge are more nearly parallel.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn