The Fuel – Old Year Questions

1. Which of the following is a natural fuel?

(a) Coal gas
(b) Tar
(c) Coke
(d) Petroleum

[U.P.P.C.S. (Pre) 1990]


2. Which of the following fossil fuels is the cleanest fuel?

(a) Coal
(b) Petrol
(c) Natural gas
(d) Diesel

[U.P.P.S.C. (R.I.) 2014]


3. Which of the following is a fossil fuel?

(a) Alcohol
(b) Ether
(c) Water gas
(d) Natural gas

[U.P.P.C.S. (Mains) 2016] 


4. Which one of the following has the highest fuel value?

(a) Hydrogen
(b) Charcoal
(c) Natural gas
(d) Gasoline

[I.A.S. (Pre) 1997]


5. Consider the following statements :
1. Coal ash contains arsenic, lead, and mercury.
2. Coal-fired power plants release sulfur dioxide and oxides of nitrogen into the environment.
3. High ash content is observed in Indian coal.
Which of the statements given above is/are correct?

(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3

[I.A.S. (Pre) 2020]


6. Why is there a concern about copper smelting plants?
1. They may release lethal quantities of carbon monoxide into the environment.
2. The copper slag can cause the leaching of some heavy metals into the environment.
3. They may release sulfur dioxide as a pollutant.
Select the correct answer using the code given below.

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

[I.A.S. (Pre) 2021]


7. Which of the following causes maximum indoor chemical pollution?

(a) Burning mosquito coil
(b) Burning coal
(c) Burning cooking gas
(d) Room spray

[Jharkhand P.C.S. (Pre) 2021]


8. Consider the following statements :
Coke is one of the materials of the charge added to a blast furnace for the production of steel/iron. Its function is to
1. Act as the reducing agent
2. Remove silica associated with the iron ore
3. Function as fuel, to supply heat
4. Act as an oxidizing agent
Of these statements :

(a) 1 and 2 are correct
(b) 2 and 4 are correct
(c) 1 and 3 are correct
(d) 3 and 4 are correct

[I.A.S. (Pre) 1998]


9. With reference to furnace oil, consider the following statements :
1. It is a product of oil refineries.
2. Some industries use it to generate power.
3. Its use causes sulphur emissions into environment.
Which of the statements given above are correct?

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

[I.A.S. (Pre) 2021]


10. Octane number is a measure of the quality of –

(a) Edible oils
(b) Petrol
(c) Kerosene oil
(d) Perfumed oil

[U.P. Lower Sub. (Pre) 2009]


11. The quality of petrol is expressed by :

(a) Cetane number
(b) Octane number
(c) Butane number
(d) Reynolds number
(e) None of the above/More than one of the above

[66th B.P.S.C. (Pre) (Re. Exam) 2020]


12. Cetane number is used as a quality parameter mainly for which of the following?

(a) Petrol
(b) Kerosene
(c) Diesel
(d) Turpentine Oil

[U.P. Lower Sub. (Pre) 2015]


13. The fuel used in a diesel engine :

(a) Vapour of diesel and air
(b) Diesel only
(c) Mixture of diesel and petrol
(d) Mixture of diesel, air and petrol

[U.P.P.C.S. (Pre) 1994]


14. Cooking gas is mainly –

(a) Carbon dioxide
(b) Carbon monoxide
(c) Methane
(d) Nitrogen and Oxygen

[44th B.P.S.C. (Pre) 2000]


15. Which one of the following gases, released from a biogas plant is used as a fuel gas?

(a) Butane
(b) Propane
(c) Methane
(d) Ethane

[U.P. P.C.S. (Pre) 2016]


16. Biogas mainly consists of –

(a) Carbon dioxide and Hydrogen
(b) Hydrogen and Methane
(c) Carbon dioxide and Methane
(d) Hydrogen and Oxygen

[U.P. U.D.A./L.D.A. (Pre) 2010]


17. The main component of biogas is :

(a) Hydrogen
(b) Methane
(c) Butane
(d) Acetylene

[Uttarakhand P.C.S. (Pre) 2012]


18. The main component of Gobar Gas is –

(a) Methane
(b) Ethane
(c) Propane
(d) Chlorine

[U.P.P.S.C. (GIC) 2010, M.P.P.C.S. (Pre) 1999]


19. Which of the following is the procedure for a biogas plant–

(a) Fermentation
(b) Reduction
(c) Hydrogenation
(d) Polymerization

[U.P. U.D.A./L.D.A. (Pre) 2013]


20. Who among the following invented the ‘Gobar Gas’ system?

(a) C.V. Raman
(b) J.C. Bose
(c) S.V. Desai
(d) H. Khorana

[U.P.P.C.S. (Pre) 2015]


21. The gas emitted from rice fields is –

(a) Ethane
(b) Methane
(c) Nitrogen
(d) All of the above

[U.P.P.C.S. (Pre) 2006]


22. The main components of Liquid Petroleum Gas (LPG) are :

(a) Methane, Ethane and Hexane
(b) Methane, Pentane and Hexane
(c) Ethane, Propane and Butane
(d) Methane, Carbon Monoxide and Hydrogen

[U.P.P.C.S. (Mains) 2013]


23. Which one of the following is the main constituent of LPG?

(a) Hexane
(b) Pentane
(c) Butane
(d) Methane

[U.P. P.C.S. (Pre) 2021]


24. What is the main component of L.P.G. –

(a) Methane
(b) Ethane
(c) Propane
(d) Butane

[Chhattisgarh P.C.S. (Pre) 2005]


25. LPG used as domestic fuel mainly contains –

(a) Methane
(b) Acetylene
(c) Ethylene
(d) Butane

[U.P.R.O./A.R.O. (Mains) 2013]


26. LPG used as domestic fuel chiefly contains

(a) Methane
(b) Propane
(c) Ethylene
(d) Butane
(e) None of the above/More than one of the above

[60th to 62nd B.P.S.C. (Pre) 2016] 


27. Indane gas is a mixture of –

(a) Butane and Hydrogen
(b) Butane and Oxygen
(c) Butane and Propane
(d) Methane and Oxygen

[U.P.P.C.S (Pre) 2011, Uttarakhand P.C.S. (Pre) 2010, R.A.S./R.T.S. (Pre) 1992]


28. The stench due to leakage from the LPG cylinder is because of :

(a) Methane
(b) Propane
(c) Butane
(d) Ethyl mercaptan

[U.P.P.C.S. (Pre) 2017]


29. Match items in List I with List- II and select the correct answer using the codes given below the lists :

List-I List-II
(Fuel Gases) (Major Constituents)
A. CNG i. Carbon monoxide, Hydrogen
B. LPG ii. Butane, Propane
C. Coal gas iii. Methane, Ethane
D. Water gas iv. Hydrogen, Methane, Carbon monoxide

Code :

(a) ii i iii iv
(b) ii iv iii i
(c) iii ii iv i
(d) iii ii i iv

[R.A.S./R.T.S.(Pre) 2013]


30. Assertion (A): The main component of the liquefied petroleum gas is methane.
Reason (R): Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.

(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.

[I.A.S. (Pre) 2005]


31. The Pressure gauge is not given in the domestic LPG cylinders because-

(a) They are so costly
(b) They cannot represent the quantity of gas in LPG cylinders
(c) Their use is not safe
(d) They are choked by LPGs

[42nd B.P.S.C. (Pre) 1997]


32. In what form cooking gas is supplied in cylinders?

(a) Liquid
(b) Gas
(c) Solid
(d) Solution

[Uttarakhand Lower Sub. (Pre) 2010]


33. CNG is –

(a) Compressed Natural Gas
(b) Cyanogen Natural Gas
(c) Condensed Nitrogen Gas
(d) Controlled Natural Gas

[U.P.P.C.S. (Pre) 2015]


34. CNG used in automobiles to check pollution mainly consists of –

(a) CH4
(b) CO2
(c) N2
(d) H2

[U.P.P.C.S. (Pre) 2005]


35. The major component of CNG is :

(a) CO2
(b) N2
(c) H2
(d) CH4
(e) None of the above/More than one of the above

[66th B.P.S.C. (Pre) (Re. Exam) 2020]


36. Which is the main component of natural gas?

(a) Methane
(b) Ethane
(c) Propane
(d) Benzene
(e) None of these

[Chhattisgarh P.C.S. (Pre) 2016]


37. Compressed Natural Gas (CNG) is mainly :

(a) Ethane
(b) Propane
(c) Methane
(d) Butane

[R.A.S./ R.T.S. (Pre) 2021]


38. Consider the following statements :
1. Liquefied Natural Gas (LNG) is liquefied under extremely cold temperatures and high pressure to facilitate storage or transportation in specially designed vessels.
2. The first LNG terminal in India was built in Hassan.
3. Natural Gas Matters (NGM) are separated from LPG and these include ethane, propane, butane, and natural gasoline.
Which of the statements given above is/are correct?

(a) 1 only
(b) 1 and 3
(c) 2 and 3
(d) 1, 2 and 3

[I.A.S. (Pre) 2005]


39. Oxygen is absent in

(a) Kerosene
(b) Glass
(c) Soil
(d) Cement
(e) None of the above/More than one of the above

[66th B.P.S.C. (Pre) (Re. Exam) 2020, 65th B.P.S.C. (Pre) 2019]


40. Gasohol is

(a) Ethyl alcohol + Petrol
(b) Natural gas + Ethyl alcohol
(c) Any gas dissolved in alcohol
(d) Ethyl alcohol + Kerosene oil

[Uttarakhand P.C.S. (Pre) 2005]


41. Gasohol is a mixture of :

(a) Gasoline and Methanol
(b) Gasoline and Ethanol
(c) Gasoline and Propanol
(d) Methanol and Ethanol

[U.P. P.C.S. (Mains) 2016]


42. Consider the following statements :
1. Coal, petroleum, and natural gas are fossil fuels.
2. Gasohol is a mixture of benzene and alcohol.
3. Geothermal energy is a non-conventional energy source.
4. Gobar gas contains mainly methane.
Of these statements :

(a) Only 1 and 2 are correct
(b) Only 2 and 3 are correct
(c) Only 1, 2 and 3 are correct
(d) 1, 3, and 4 are correct

[U.P.P.C.S. (Mains) 2009]


43. To avoid ‘knocking’ on the engine of a car, which one of the following is used as an anti-knocking agent?

(a) Ethyl alcohol
(b) Butane
(c) Tetraethyl Lead
(d) White Petrol

[U.P.P.C.S. (Pre) 1998]


44. Tetraethyl Lead (TEL) is added to petrol :

(a) To prevent it from freezing
(b) To increase its f ash point
(c) To increase its anti-knocking rating
(d) To increase its boiling point

[U.P.P.C.S. (Pre) 1996]


45. Which one of the following is used as an anti-freeze for automobile engines?

(a) Propyl alcohol
(b) Ethanol
(c) Methanol
(d) Ethylene glycol

[I.A.S. (Pre) 1997]


46. Diesel used in heavy vehicles for –

(a) Extra mileage and save engine
(b) Low expense and save the fuel
(c) High power and economic saving
(d) Being cheaper than low petrol

[U.P.P.C.S. (Pre) 1992]


47. Consider the following features of newer models of motor cars :
1. Radial tyres
2. Streamlined body
3. Multipoint fuel injection
4. Catalytic converter with exhaust
Which of these features make the new models of motor cars more fuel efficient?

(a) 1 and 2
(b) 2 and 3
(c) 2, 3 and 4
(d) 1, 3 and 4

[I.A.S. (Pre) 2000]


48. Hydrogen gas can be conveniently used as a fuel for running vehicles if it is absorbed at a very low temperature by a substance only to be released at the temperature generated by the exhaust. What is that substance found in India?

(a) Hydride
(b) Coals
(c) Soapstone
(d) Resins

[U.P.P.C.S. (Pre) 2008]


49. Which of the following is the by-product derived from the refining process of petroleum?

(a) Petrol
(b) Charcoal
(c) Coal
(d) Asphalt

[U.P. U.D.A./L.D.A. (Pre) 2013]


50. ‘Hydrocarbon Vision 2025’ is associated with :

(a) Storage of petroleum products
(b) Euro I and Euro II vehicles
(c) Green House effect
(d) None of the above

[U.P.P.C.S. (Pre) 2000]