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Engineering > Mechanical Engineering

INTERNAL COMBUSTION ENGINES I C ENGINES MCQs

Total Questions : 256

Page 1 of 13 pages
Question 1. If v₁ is the jet velocity and v₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by
  1.     [2(V₀/V₁)]/ [1 + (V₀/V₁)²]
  2.     (V₀/V₁)/ [1 + (V₀/V₁)²]
  3.     V₀/(V₀ + V₁)
  4.     V₁/(V₀ + V₁)
Answer: Option A
Explanation :

Question 2. The cetane (c₁₆h₃₄) which is a straight chain paraffin, is assigned a cetane number of
  1.     0
  2.     50
  3.     100
  4.     120
Answer: Option C
Explanation :

Question 3. The cetane (c₁₆h₃₄) which is a straight chain paraffin, is assigned a cetane number of
  1.     0
  2.     50
  3.     100
  4.     120
Answer: Option C
Explanation :

Question 4. In diesel engine, the compression ratio in comparison to expansion ratio is
  1.     Same
  2.     Less
  3.     More
  4.     Variable
Answer: Option C
Explanation :

Question 5. The cetane (c₁₆h₃₄) which is a straight chain paraffin, is assigned a cetane number of
  1.     0
  2.     50
  3.     100
  4.     120
Answer: Option C
Explanation :

Question 6. The cetane (c₁₆h₃₄) which is a straight chain paraffin, is assigned a cetane number of
  1.     0
  2.     50
  3.     100
  4.     120
Answer: Option C
Explanation :

Question 7. If v₁ is the jet velocity and v₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by
  1.     [2(V₀/V₁)]/ [1 + (V₀/V₁)²]
  2.     (V₀/V₁)/ [1 + (V₀/V₁)²]
  3.     V₀/(V₀ + V₁)
  4.     V₁/(V₀ + V₁)
Answer: Option A
Explanation :

Question 8. If v₁ is the jet velocity and v₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by
  1.     [2(V₀/V₁)]/ [1 + (V₀/V₁)²]
  2.     (V₀/V₁)/ [1 + (V₀/V₁)²]
  3.     V₀/(V₀ + V₁)
  4.     V₁/(V₀ + V₁)
Answer: Option A
Explanation :

Question 9. If v₁ is the jet velocity and v₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by
  1.     [2(V₀/V₁)]/ [1 + (V₀/V₁)²]
  2.     (V₀/V₁)/ [1 + (V₀/V₁)²]
  3.     V₀/(V₀ + V₁)
  4.     V₁/(V₀ + V₁)
Answer: Option A
Explanation :

Question 10. If v₁ is the jet velocity and v₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is
  1.     V₁ / (V₀ + V₁)
  2.     V₀ / (V₀ + V₁)
  3.     2V₀ / (V₀ + V₁)
  4.     2V₁ / (V₀ + V₁)
Answer: Option C
Explanation :

Question 11. If v₁ is the jet velocity and v₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is
  1.     V₁ / (V₀ + V₁)
  2.     V₀ / (V₀ + V₁)
  3.     2V₀ / (V₀ + V₁)
  4.     2V₁ / (V₀ + V₁)
Answer: Option C
Explanation :

Question 12. If v₁ is the jet velocity and v₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is
  1.     V₁ / (V₀ + V₁)
  2.     V₀ / (V₀ + V₁)
  3.     2V₀ / (V₀ + V₁)
  4.     2V₁ / (V₀ + V₁)
Answer: Option C
Explanation :

Question 13. If v₁ is the jet velocity and v₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is
  1.     V₁ / (V₀ + V₁)
  2.     V₀ / (V₀ + V₁)
  3.     2V₀ / (V₀ + V₁)
  4.     2V₁ / (V₀ + V₁)
Answer: Option C
Explanation :

Question 14. Iso-octane (c₈h₁₈) has octane number of
  1.     0
  2.     50
  3.     100
  4.     120
Answer: Option C
Explanation :

Question 15. Iso-octane (c₈h₁₈) has octane number of
  1.     0
  2.     50
  3.     100
  4.     120
Answer: Option C
Explanation :

Question 16. Iso-octane (c₈h₁₈) has octane number of
  1.     0
  2.     50
  3.     100
  4.     120
Answer: Option C
Explanation :

Question 17. Iso-octane (c₈h₁₈) has octane number of
  1.     0
  2.     50
  3.     100
  4.     120
Answer: Option C
Explanation :

Question 18. The maximum temperature in the I.C. engine cylinder is of the order of
  1.    500-1000°C
  2.    1000-1500°C
  3.    1500-2000°C
  4.    2000-2500°C
Answer: Option D

Question 19. For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of
  1.    9 : 1
  2.    12 : 1
  3.    15 : 1
  4.    18 : 1
Answer: Option B

Question 20. In petrol engines, the delay period is of the order of
  1.    0.001 second
  2.    0.002 second
  3.    0.003 second
  4.    0.004 second
Answer: Option B

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