This set of Engineering Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “Classification of Fuel”.
1. Which type of fuel is lignite?
a) Secondary fuel
b) Primary fuel
c) Liquid fuel
d) Gaseous fuel
Explanation: Lignite is a primary fuel as it can be extracted from nature without any sort of transformation process. Lignite is soft brown coal. It is considered as the lowest rank of coal.
2. Acetylene and synthesis gas are examples of __________
a) Primary gaseous fuels
b) Gaseous fuels
c) Secondary gaseous fuels
d) Liquid fuels
Explanation: Since both Acetylene and synthesis gas are formed by certain process and both are gaseous in nature, therefore they are secondary gaseous fuels. Acetylene can be formed by the hydrolysis of calcium carbide.
3. Alcohol is a primary fuel.
Explanation: Alcohol are formed by direct hydration of alkenes, that is why this is a false statement. Formation of ethanol by the hydration of ethylene.
C2H4 + H2O → C2H5OH
4. Which of the fuel does have highest specific energy?
Explanation: Specific energy is the amount of energy liberated after combustion, as among these diesel liberated the highest amount of energy which is 48 MJ/kg.
5. Which type of coal give more amount of heat after combustion?
Explanation: The coal is formed along this process
Peat → Lignite → Bituminous → Anthracite
Since anthracite is the purest form of the coal, it gives the highest amount of heat after combustion.
6. Which fuel is best suitable for blast furnace process?
b) Hydrogen Gas
Explanation: Coke is best suitable for blast furnace process as it also acts as a reducing agent in smelting iron ore. The specific heat of coke is 0.85 kJ/kg K.
7. Which fuel causes least pollution?
c) LPG (Liquid Petroleum Gas)
d) Hydrogen gas
Explanation: Pollution is mainly caused by the presence of CO2 in air. Since after combustion of H2 it only gives water vapour which is less polluting.
8. Which of the gas is not a constituent of biogas?
d) SO2 (Sulphur di-oxide)
Explanation: Since biogas is formed by the domestic waste of home and industries, it does not contain the gases like SO2, NO2 etc. It does contain the hydrogen sulphide.
9. Which fuel can be produced from the carbohydrate content of algae?
b) Hydrogen gas
d) LPG (Liquid Petroleum Gas)
Explanation: The carbohydrate part of algae is fermented due to which Butanol is produced. By this process, bio-ethanol can also be produced.
10. Which of the following fuel cannot be used in producing nuclear energy?
Explanation: Since deuterium contains two electrons in its shell, it becomes difficult to break into a fully filled octet, due to which it cannot be used as a fuel in nuclear energy.
Sanfoundry Global Education & Learning Series – Engineering Chemistry.
To practice all areas of Engineering Chemistry, here is complete set of 1000+ Multiple Choice Questions and Answers.