‘Wind loss’ resulting from unscientific storage of coal may be the order of about _____________ percent?
A. 2.5
B. 7.5
C. 10.5
D. 14.5
Fuels and Combustion
Laboratory gas is obtained by the cracking of____________________?
Laboratory gas is obtained by the cracking of____________________?
A. Gasoline
B. Diesel
C. Fuel oil
D. Kerosene
Coal is pulverised before burning in large capacity boiler furnaces mainly to____________________
Coal is pulverised before burning in large capacity boiler furnaces mainly to____________________
A. Ensure its complete combustion
B. Facilitate easy ash removal
C. Enhance its calorific value
D. Provide trouble free operation
Mott and Wheeler test is conducted on coke to find its _____________________?
Mott and Wheeler test is conducted on coke to find its _____________________?
A. Reactivity with O2
B. Abradability
C. Phosphorus content
D. Volatile matter content
A coal having high volatile matter content will ________________?
A coal having high volatile matter content will ________________?
A. Give less yield of tar and gas on carbonisation
B. Burn with a small non-smoky flame
C. Have a very high calorific value
D. None of these
Combustion reaction of fuels is a/an ______________ reaction?
Combustion reaction of fuels is a/an ______________ reaction?
A. Auto catalytic
B. Exothermic
C. Endothermic
D. None of these
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?
A. More
B. Less
C. Same
D. Data insufficient; can’t be predicted
Bomb calorimeter can be used to determine the _____________ of the coal?
Bomb calorimeter can be used to determine the _____________ of the coal?
A. Sulphur content
B. Calorific value
C. Both A. & B.
D. Neither A. nor B.
Largest constituent of coke oven gas is_________________?
Largest constituent of coke oven gas is_________________?
A. N2
B. H2
C. CH4
D. CO2
The maximum adiabatic flame temperature in air is _____________ the maximum flame temperature in pure oxygen?
The maximum adiabatic flame temperature in air is _____________ the maximum flame temperature in pure oxygen?
A. Lower than
B. Higher than
C. Same as
D. Not related to