78. Scavenging is usually done to increase
A.Thermal efficiency
B.Speed
C.Power output
D.Fuel consumption

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79. 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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80. 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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81. 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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82. 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

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83. The following volume of air is required for consuming 1 litre of fuel by a four stroke engine
A.1 m3
B.2.5 m3
C.5 -6 m3
D.9 - 10 m3

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84. A 5 BHP engine running at full load would consume diesel of the order of
A.0.3 kg/hr
B.1.0 kg/hr
C.3.0 kg/hr
D.5.0 kg/hr

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