A. Solid fuels
B. Liquid fuels
C. Those fuels which are found in the crust of earth
D. Premature fuels with low calorific value
Fossil fuels mean___________________? Read More »
Fuels and Combustion A. Lengthens the flame
B. Causes heat loss of fuel by its partial combustion
C. Both A. & B.
D. Shortens the flame
Deficiency of combustion air during combustion of a gaseous fuel_____________________? Read More »
Fuels and Combustion A. Pulverised coal
B. Gaseous fuels
C. Fuel oil
D. None of these
Junker’s calorimeter is used to determine the calorific value of______________________? Read More »
Fuels and Combustion A. Lignite
B. Bituminous coal
C. Anthracite coal
D. None of these
Which of the following can be made into briquettes without the use of a binder ? Read More »
Fuels and Combustion A. 80-170
B. 200-300
C. 250-270
D. 280-300
A. B.F. gas and coke oven gas
B. Coke oven gas and converter gas
C. Coke oven gas and L.P.G
D. Blast furnace gas and naphtha vapor
‘Mixed gas’ used in steel plants is a mixture of___________________? Read More »
Fuels and Combustion A. Increase the adiabatic flame temperature
B. Increase the calorific value of the fuel
C. Complete the combustion of fuel
D. Reduce its requirement for effecting the complete combustion
Preheating of combustion air is done to ___________________? Read More »
Fuels and Combustion A. 100 to 150
B. 350 to 450
C. 550 to 650
D. 700 to 850
A. Ash
B. Inherent mineral matter
C. Free impurities
D. Volatile matter
Coal containing large quantity of _______________ are difficult to wash? Read More »
Fuels and Combustion A. Produce smaller coke
B. Produce stronger coke
C. Require less time of carbonisation
D. All A., B. and C.
Narrow coke ovens as compared to wider coke ovens_________________? Read More »
Fuels and Combustion