IC Engines - Interview Questions | Exam2Win

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81. Pour point of fuel oil is the

A. minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

B. temperature at which it solidifies or congeals

C. it catches fire without external aid

D. indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off

E. temperature at which it flows easily.

Explanation:

82. Installation of supercharger on a four-cycle diesel engine can result in the following percentage increase in power

A. upto 25%

B. upto 35%

C. upto 50%

D. upto 75%

E. upto 100%.

Explanation:

83. A hmh flame speed is obtained in diesel engine when air fuel ratio is

A. uniform throughout the mixture

B. chemically correct mixture

C. about 3-5% rich mixture

D. about 10% rich mixture

E. about 10% lean mixture.

Explanation:

84. The following volume of air is required for consuming 1 liter of fuel by a four stroke engine

A. 1 m3

B. 5 m3

C. 5-6 m3

D. 9-10 m3

E. 15-18 m3.

Explanation:

85. The air-fuel ratio in petrol engines-is controlled by

A. controlling valve opening/closing

B. governing

C. injection

D. carburettion

E. scavenging and supercharging.

Explanation:

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