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Fuels and Combustion

The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always ___________________?

Fuels and Combustion /
The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always ___________________?

A. 1
B. < 1
C. > 1
D. Unpredictable

The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always ___________________? Read More »

Fuels and Combustion

Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if __________________?

Fuels and Combustion /
Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if __________________?

A. It contains large amount of volatile matter
B. It is stored in tall heaps
C. Smaller fines are stored in large quantity
D. All A., B. and C.

Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if __________________? Read More »

Fuels and Combustion

If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be_____________?

Fuels and Combustion /
If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be_____________?

A. Low
B. High
C. Very high, if the fuel is of low calorific value
D. None of these

If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be_____________? Read More »

Fuels and Combustion

Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about _____________ °C?

Fuels and Combustion /
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about _____________ °C?

A. 400-500
B. 900-1000
C. 1400-1500
D. 1700-1800

Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about _____________ °C? Read More »

Fuels and Combustion