Top 50+ Solved Combustion MCQ Questions Answer
Q. When crude oil is heated, then which of the following hydrocarbon is given off first.
a. kerosene
b. gasoline
c. paraffin
d. natural gas.
Q. The rating of a diesel engine, with increase in air-intlet temperature, will
a. increase linearly
b. decrease linearly
c. increase parabolically
d. decrease parabolically
Q. A 75 cc engine has following parameter as 75 cc
a. fuel tank capacity
b. lub oil capacity
c. swept volume
d. cylinder volume
Q. A heat engine utilises the
a. calorific value of oil
b. low heat value of
c. high heat value of oil
d. mean heat value of oil
Q. Gaseous-fuel guarantees are based on
a. calorific value of oil
b. low heat value of oil
c. high heat value of oil
d. mean heat value of oil
Q. Fuel consumption of diesel engines is not guaranteed at one quarter load because at suchlow loads
a. the friction is high
b. the friction is unpredictable
c. the small difference in cooling water temperature or in internal friction has a disproportionate effect
d. the engine is rarely operated
Q. Polymerisation is a chemical process in which molecules of a compound become
a. larger
b. slowed down
c. smaller
d. liquid
Q. Which of the following is the lightest and most volatile liquid fuel
a. diesel
b. kerosene
c. fuel oil
d. gasoline
Q. 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
Q. Air fuel ratio for idling speed of a petrol engine is approximately
a. 1 : 1
b. 5 : 1
c. 10:1
d. 15 : 1
Q. 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