IC Engine Questions and Answers – Automotive Engines

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This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Automotive Engines”.

1. For idling condition in automotive engines, the air-fuel mixture must be ______________
a) lean
b) rich
c) chemically balanced
d) none of the mentioned
View Answer

Answer: b
Explanation: Generally, for idling condition in automotive engines, the air-fuel mixture must be a rich mixture and for cruising condition in automotive engines, the air-fuel mixture must be a lean mixture.
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2. For cruising condition in automotive engines, the air-fuel mixture must be ___________
a) lean
b) rich
c) chemically balanced
d) none of the mentioned
View Answer

Answer: a
Explanation: For cruising condition in automotive engines, the air-fuel mixture must be a lean mixture and for idling condition in automotive engines, the air-fuel mixture must be a rich mixture.

3. For high power condition in automotive engines, the air-fuel mixture must be ___________
a) lean
b) rich
c) chemically balanced
d) none of the mentioned
View Answer

Answer: b
Explanation: For high power condition in automotive engines, the air-fuel mixture must be a rich mixture while for cruising condition in automotive engines, the air-fuel mixture must be a lean mixture and for idling condition in automotive engines, the air-fuel mixture must be a rich mixture.
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4. To prevent overheating of exhaust valve and the area near it, the air-fuel mixture must be ___________
a) lean
b) rich
c) chemically balanced
d) none of the mentioned
View Answer

Answer: b
Explanation: None.

5. In an automobile engine, the indication of knocking is available in the form of ___________
a) light
b) gas
c) audible sound
d) none of the mentioned
View Answer

Answer: c
Explanation: Generally, in an automobile engine, indication of knocking is available in the form of audible sound.
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6. The operator can make the engine operating conditions less stringent by ___________
a) jamming the throttle
b) releasing the throttle
c) engaging the throttle
d) none of the mentioned
View Answer

Answer: b
Explanation: None.

7. When the throttle is suddenly opened, the mixture from the simple carburetor tends to become ___________
a) rich
b) lean
c) stoichiometric
d) not affected
View Answer

Answer: b
Explanation: Generally, when the throttle is suddenly opened, the mixture from the simple carburetor tends to become lean.
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8. Which of the following is a Precise petrol injection system?
a) direct injection
b) sequential injection
c) throttle body injection
d) port injection
View Answer

Answer: c
Explanation: None.

Sanfoundry Global Education & Learning Series – IC Engine.

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To practice all areas of IC Engine, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia - Founder & CTO at Sanfoundry
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 | Youtube | Instagram | Facebook | Twitter