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Mechanical Engineering Objective Questions { Internal Combustion Engines }



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

79. Which of the following is the lightest and most volatile liquid fuel
A.Diesel
B.Kerosene
C.Fuel oil
D.Gasoline

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

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

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

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

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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