Fuel

21.	Which of the following gas discharged from biogas plant is used as fuel gas?
	A. butane
	B. propane
	C. methane
	D. ethane Option”C” is correct

22.	The main component of LPG is
	A. methane
	B. ethane
	C. pentane
	D. butane Option”D” is correct

23.	Full form of LPG is
	A. liquefied petroleum gas
	B. liquefied petroleum gas
	C. leaded petroleum gas
	D. low petroleum gas Option”B” is correct

24.	Why CNG is called eco-friendly
	A. very little hydrogen
	B. Its main component is ethane gas
	C. It contains very little carbon monoxide
	D. The combustion gases do not burn completely in this, so the emissions are very less. Option”C” is correct

25.	Which of the following has the highest fuel value
	A. hydrogen
	B. charcoal
	C. natural gas
	D. gasoline Option”A” is correct

26.	Which of the following fuels produces the least environmental pollution?
	A. hydrogen
	B. Coal
	C. diesel
	D. kerosene Option”A” is correct

27.	What type of fuel is used in rockets
	A. biomass
	B. Coke
	C. propellant
	D. coal gas Option”C” is correct

28.	Which type of coal has the highest amount of carbon
	A. Pete
	B. lignite
	C. bintumous
	D. anthracite Option”D” is correct

29.	brown coal is also known as
	A. Pete
	B. lignite
	C. bintumous
	D. anthracite Option”B” is correct

30.	refers to the antiknock property of a fuel
	A. golden number
	B. Natural numbers
	C. octane number
	D. mac number Option”C” is correct

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