Internal Combustion Engines (I.C. Engines) MCQs | Page - 4

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads

• (A) the friction is high
• (B) the friction is unpredictable
• (C) the small difference in cooling water temperature or in internal friction has a disproportionate effect
• (D) the engine is rarely operated

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✅ Correct Answer: (C) the small difference in cooling water temperature or in internal friction has a disproportionate effect

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. Polymerisation is a chemical process in which molecules of a compound become

• (A) larger
• (B) slowed down
• (C) smaller
• (D) liquid

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✅ Correct Answer: (A) larger

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. Which of the following is the lightest and most volatile liquid fuel

• (A) diesel
• (B) kerosene
• (C) fuel oil
• (D) gasoline

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✅ Correct Answer: (D) gasoline

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. The theoretically correct air fuel ratio for petrol engine is of the order of

• (A) 6 : 1
• (B) 9 : 1
• (C) 12 : 1
• (D) 15 : 1

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✅ Correct Answer: (D) 15 : 1

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. Air fuel ratio for idling speed of a petrol engine is approximately

• (A) 1 : 1
• (B) 5 : 1
• (C) 10:1
• (D) 15 : 1

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✅ Correct Answer: (C) 10:1

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. Air fuel ratio at which a petrol engine can not work is

• (A) 8 : 1
• (B) 10 : 1
• (C) 15 : 1
• (D) 20 : 1 and less

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✅ Correct Answer: (D) 20 : 1 and less

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. Advantage of gaseous fuel is that

• (A) it can be stored easily
• (B) it can mix easily with air
• (C) it can displace more air from the engine
• (D) all of the above

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✅ Correct Answer: (B) it can mix easily with air

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. Paraffins are in general represented by

• (A) CnHn
• (B) CnH2n
• (C) CnH2n+2
• (D) CnH2n-6

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✅ Correct Answer: (C) CnH2n+2

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Mr. Dubey

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📊 Internal Combustion Engines (I.C. Engines)

Q. Paraffins have molecular structure of

• (A) chain saturated
• (B) chain unsaturated
• (C) ring saturated
• (D) ring unsaturated

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✅ Correct Answer: (A) chain saturated

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Mr. Dubey

🎓 Coach ⭐ 104.60K Points

📊 Internal Combustion Engines (I.C. Engines)

Q. Olefins are represented by the formula

• (A) CnH2n
• (B) CnH2n+2
• (C) CnH2n-4
• (D) CnH2n-6

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✅ Correct Answer: (A) CnH2n

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