IC Engines - Interview Questions and Answers

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76. For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of
A. 9 : 1
B. 12 : 1
C. 15 : 1
D. 18 : 1
E. 20: 1.
Explanation:
77. 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
E. will work at all ratios.
Explanation:
78. The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is
A. same
B. less
C. more
D. more or less depending on power rating
E. unpredictable.
Explanation:
79. Which of the following is the lightest and most volatile liquid fuel
A. diesel
B. kerosene
C. fuel oil
D. gasoline
E. lub oil.
Explanation:
80. A stoichiometric air-fuel ratio is
A. chemically correct mixture
B. lean mixture
C. rich mixture for idling
D. rich mixture for over loads
E. the ratio used at full rated parameters.
Explanation: