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Total Questions : 1124 | Page 2 of 113 pages
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)
 Discuss Question
Answer: Option C. ->  2V₀ / (V₀ + V₁)
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)
 Discuss Question
Answer: Option C. ->  2V₀ / (V₀ + V₁)
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)
 Discuss Question
Answer: Option C. ->  2V₀ / (V₀ + V₁)
Explanation :
Question 14. Iso-octane (c₈h₁₈) has octane number of
  1.     0
  2.     50
  3.     100
  4.     120
 Discuss Question
Answer: Option C. ->  100
Explanation :
Question 15. Iso-octane (c₈h₁₈) has octane number of
  1.     0
  2.     50
  3.     100
  4.     120
 Discuss Question
Answer: Option C. ->  100
Explanation :
Question 16. Iso-octane (c₈h₁₈) has octane number of
  1.     0
  2.     50
  3.     100
  4.     120
 Discuss Question
Answer: Option C. ->  100
Explanation :
Question 17. Iso-octane (c₈h₁₈) has octane number of
  1.     0
  2.     50
  3.     100
  4.     120
 Discuss Question
Answer: Option C. ->  100
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
 Discuss Question
Answer: Option D. -> 2000-2500°C
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
 Discuss Question
Answer: Option B. -> 12 : 1
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
 Discuss Question
Answer: Option B. -> 0.002 second

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