250+ TOP MCQs on Gaseous Fuels & Nuclear Fuels and Answers

Energy Engineering Multiple Choice Questions on “Gaseous Fuels & Nuclear Fuels”.

1. Which fuels are either natural or artificial fuels?
A. Gaseous fuels
B. Solid fuels
C. Liquid fuels
D. Nuclear fuels

Answer: A
clarification: Gaseous fuels are either natural fuels or artificial fuels. Natural fuels occur in the form of natural gas near oil bearing areas under earth’s surface. Artificial fuels prepared are coal gas coke oven gas, blast furnace gas, producer gas, water gas and mond gas.

2. Which gaseous fuel is found dissolved in petroleum under earth’s surface in oil and gas bearing areas?
A. Natural gas
B. Coal gas
C. Mond gas
D. Producer gas

Answer: A
clarification: Natural gas is found dissolved in petroleum under earth’s surface in oil and gas bearing areas. It mainly contains 85% Methane (CH4) and hydrogen (H2) along with small percentages of ethane and ethylene. Liquefied petroleum gas (LPG) is a mixture of propane, butane and other hydrocarbons separated from natural gas. It is stored under pressure in the liquid form. It is used as a domestic fuel and as an automobile fuel.

3. Which gaseous fuel is called as town gas?
A. Natural gas
B. Coke oven gas
C. Coal gas
D. Mond gas

Answer: C
clarification: Coal gas is called as town gas. It is a by-product obtained during destructive distillation of coal. It mainly contains H2, CO, CO2, CH4 and N2. It has a calorific value ranging from 21000KJ/m3 to 25000KJ/m3. The gas obtained when coal is heated strongly in the absence of air is called coal gas.

4. Which gaseous fuel is obtained by carbonization of bituminous coal?
A. Blast furnace gas
B. Coal gas
C. Producer gas
D. Coke oven gas

Answer: D
clarification: Coke oven gas is a fuel gas having a medium calorific value that is produced during the manufacture of metallurgical coke by heating bituminous coal to temperatures of 900oC to 1000oC in a chamber from which air is excluded. The main constituents are 50% H2, 30% methane and 3% higher hydrocarbons, 7% CO, 3% CO2 and 7% N2. The gas has heating value of about 20,000 KJ/m3.

5. Which gaseous fuel has a very low heating value?
A. Blast furnace gas
B. Coke oven gas
C. Water gas
D. Mond gas
View Answer

Answer: A
clarification: Blast furnace has a very low heating value. It is obtained as a by-product during blast furnace operation. Due to high percentage of dust content it should be purified before use. It has a calorific value ranging between 3800 KJ/m3 to 4200 kJ/m3. It is used as a fuel in gas engines in steam generation and in steel plants.

6. Which gaseous fuel is obtained by partial combustion of coke?
A. Coke oven gas
B. Producer gas
C. Coal gas
D. Blast furnace gas
View Answer

Answer: B
clarification: Producer gas is obtained by partial combustion of coke or coal in the presence of air and steam mixture. It has a calorific value ranging between 5000 kJ/mm3 to 6800 kJ/mm3. It is used in glass melting in Industries and also for power generation.

7. What gaseous Fuel is obtained by passing steam over candescent coke?
A. Producer gas
B. Water gas
C. Coal gas
D. Coke over gas

Answer: B
clarification: Water gas is obtained by passing steam over candescent coke. It burns with a blue flame and hence it is known as blue water gas. It has calorific value ranging between10500KJ/mm3 to 2300KJ/mm3. It is used in welding and in furnaces.

8. Which gaseous fuel is produced by passing air and steam over waste coal?
A. Blast furnace gas
B. Coal gas
C. Mond gas
D. Coke oven gas
View Answer

Answer: C
clarification: Mond gas is gaseous fuel that is produced by passing air and large amount of steam over waste coal at about 650oC. It has a calorific value of 5800KJ/mm3. The mond gas process was designed to convert cheap coal into flammable gas, which was made up of mainly hydrogen while recovering ammonium sulphate. The gas produced was rich in hydrogen and poor in carbon monoxide. Although it could be used for some industrial purposes and power generation, the gas was limited for heating or lighting.

9. Which of the fuels give enormous amount of energy?
A. Gaseous
B. Solid
C. Liquid
D. Nuclear

Answer: D
clarification: Nuclear fuels result in generation of enormous amount of energy by nuclear reactions namely fission and fusion. In fission reactions, a heavy atom is split by neutrons into two lighter fragments. In fusion reactions, two lighter atomic nuclei are fused together to form a single, heavy nucleus. In order to carry out nuclear reactions fissionable materials are used as fuels.

10. Which is the only nuclear fuel that occurs in nature in abundantly?
A. Plutonium
B. Radium
C. Thorium
D. Uranium

Answer: D
clarification: Uranium is the only fissionable nuclear fuel occurring in nature. It consists of 99.3% of 92U238, 0.7% 92U235 and small traces of 92U234. Out of these isotopes only 92U235 is used in fission reaction. Uranium is a very heavy metal which has been used as an abundant source of concentrated energy for 60 years.

11. What do you get when you convert 92U238 (uranium) by conversion process and reacting with neutron?
A. 94Pu239
B. 94Pu231
C. 94Pu241
D. 94Pu244

Answer: A
clarification: Conversion process of uranium 92U238
92U238 + 0n1 -> 92U239 + γ – radiation
92U239 -> 93Np239 (Neptunium) + -1e0 (Electron)
93Np239 -> 94Pu239 + -1e0

12. What do you get when breeding process is carried out on 90Th232?
A. 92U233
B. 92U234
C. 92U235
D. 92U236

Answer: A
clarification: When breeding process is performed on 90Th232 (Thorium)
90Th232 + 0n190Th233 + γ -radiation
90Th23391Pa233 (Protactinium) + -1e0 (Electron)
91Pa23392U233 + -1e0.

13. Which fuels can breed fissile uranium-233 to be used in various kinds of nuclear reactor?
A. Thorium
B. Neptunium
C. Plutonium
D. Radium

Answer: A
clarification: Thorium fuels can breed fissile uranium-233 to be used in various kinds of nuclear reactor. The use of thorium as a new primary energy source has been tantalizing prospects for many years. It is fertile rather than fissile, and can only be used as a fuel in conjunction with a fissile material.

14. Which two nuclear fuels are produced artificially?
A. 92Pu239 and 92U233
B. 92Pu244 and 92U234
C. 92Pu241 and 92U235
D. 92Pu242 and 92U236
View Answer

Answer: A
clarification: Plutonium 92Pu239 and uranium 92U233 are the fissionable materials produced artificially from 92U238 and 90Th232 respectively. Uranium-238 and thorium 232 are available in nature. They are known as fertile materials. These fertile materials when placed close to 92U235 in a reactor absorb the emitted neutrons to produce fissionable materials as follows.

15. What helps in converting uranium into fuel?
A. Breeder
B. Vitrification
C. Fuel fabricator
D. Enrichment plant

Answer: C
clarification: Fuel fabrication plants help in converting enriched uranium into fuel for nuclear reactors. For light water reactors, uranium is received from an enrichment plant in solid form. It is then converted into uranium dioxide powder. This powder is passed into pellets and packed into fuel assemblies.