Automotive Engine Auxiliary Systems Multiple Choice Questions on “Properties of Conventional Fuels”.
1. The fuel should have high anti-knock value to make use of what?
a) Higher compression ratio
b) Lower compression ratio
c) Higher noise
d) Higher knock
Answer: a
Clarification: Volatility indicates the tendency of the fuel to change from liquid to vapor form, and the fuel should have high anti-knock value to make use of a Higher compression ratio.
2. Which property indicates the tendency of the fuel to change from liquid to vapor form?
a) Knock rating
b) Calorific value
c) Volatility
d) Gum content
Answer: c
Clarification: Volatility indicates the tendency of the fuel to change from liquid to vapor form. Higher the value of volatility, the more the combustion takes place. So the fuel should have more volatility for complete combustion.
3. What is the approximate calorific value of the gasoline?
a) 1-28MJ/Kg
b) 38-48MJ/Kg
c) 50-70MJ/Kg
d) 57-68MJ/Kg
Answer: b
Clarification: The fuel should have a high calorific value. However, it is seen that for the different grade, gasoline have approximately the calorific value of 38-48MJ/Kg.
4. Some of the Sulphur content in the fuel forms which compound?
a) Corrosive compound
b) Crystal compound
c) Amorphous compound
d) Both crystal and amorphous
Answer: a
Clarification: A high Sulphur content is undesirable. Some of the Sulphur compounds restrict the action of lead and some fuel forms Corrosive compound.
5. The aromatic content in the fuel has corrosive action of the rubber in fuel and has what?
a) Low boiling point
b) High boiling point
c) Low melting point
d) High freezing point
Answer: d
Clarification: Aromatics are high knock rating hydrocarbons, the aromatic content in the fuel has corrosive action of the rubber in fuel and has High freezing point.
6. What does CNG stand for?
a) Common natural gas
b) Compressed natural gas
c) Common nitrogen gas
d) Compressed nitrogen gas
Answer: b
Clarification: LPG stands for Liquefied petroleum gas; LNG stands for Liquefied natural gas and CNG stands for Compressed natural gas. Hence, Compressed natural gas is the right answer.
7. What does LNG stand for?
a) Lithium nitrogen gas
b) Liquefied natural gas
c) Lithium natural gas
d) Liquefied nitrogen gas
Answer: b
Clarification: LPG stands for Liquefied petroleum gas, LNG stands for Liquefied natural gas and CNG stands for Compressed natural gas. Hence, Liquefied natural gas is the right answer.
8. What does LPG stand for?
a) Liquefied petroleum gas
b) Lithium petroleum gas
c) Liquefied potash gas
d) Lithium potash gas
Answer: a
Clarification: LPG stands for Liquefied petroleum gas, the petroleum gas is compressed at a very high temperature and pressure to obtain it in liquid form, and then it is stored in the container.
9. What does M85/E15 represent?
a) 85% methylene and 15%ethlyene
b) 85% methanol and 15% ethanol
c) 85% methyl and 15%ethyl
d) 85% methyl and 15%ethlyene
Answer: b
Clarification: M85/E15 represents that the mixture of gasoline contains 85% methanol and 15% ethanol. Methanol and Ethanol are two main constituents is gasoline.
10. Which of the mentioned below is not a material of Bio-fuel?
a) Soya bean
b) Rapeseed
c) Paddy
d) Jatropha