A. Furnace oil
B. Natural gas
C. Coal
D. Naphtha
Related Mcqs:
- C/H ratio is the maximum in case of_________________?
A. Coal
B. Furnace oil
C. Natural gas
D. Naphtha - Out of the following fuels, the difference between the net and gross calorific value is maximum in case of_________________?
A. Pitch
B. Fuel oil
C. Blast furnace gas
D. Bituminous coal - The difference between total carbon and fixed carbon of coal will be minimum in case of___________________?
A. Lignite
B. Bituminous coal
C. Anthracite
D. High temperature coke (V.M < 0.5%) - Out of the following fuels, the difference between gross and net calorific value will be minimum in case of___________________?
A. Coke oven gas
B. Water gas
C. Natural gas
D. Blast furnace gas - For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will_____________________?
A. Increase
B. Decrease
C. Increase or decrease depending on the fuel type
D. Not change - A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon _________________?
A. Is less liable to spontaneous combustion on storage
B. Is more difficult to ignite and produces a shorter flame
C. Requires smaller combustion space and less secondary air
D. None of these - Blast furnace gas constitutes mainly of_________________?
A. N2 & CH4
B. N2 & H2
C. N2 & CO
D. CH4 & CO2 - Coal tar (produced by high temperature carbonisation) is the main source of_________________?
A. Aromatic compounds
B. Aliphatic compounds
C. Paraffins
D. Olefins - In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of__________________?
A. Transportation of coal
B. Drying of coal
C. Combustion of coal by supplying it around the burner
D. Preheating the primary air - With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion____________________?
A. Increases
B. Decreases
C. Remain same
D. Either A. or B., depends on other factors
