Which of the following is not a micro component present in coal ?
Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter.
As the equilibrium moisture content of the coal increases, its
Which of the following is a measure of the agglutinating (i.e., binding) property of coal?
Efficient burning of anthracite coal requires
C/H ratio is the minimum in case of
Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.
Calorific value as determined by bomb calorimeter is the
Presence of nitrogen in combustion air does not reduce the
Low temperature carbonisation of coal takes place at __________ °C.
Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3)?
Fusion point of coal ash generally varies fromtoC. Ash having fusion point less than __________ °C is liable to form clinker.
Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C.
Which of the following has the highest heat of combustion?
Which of the following would require maximum amount of % excess air for complete combustion ?
Safe condition for storage of high V.M. bituminous coal is that
Ignition temperature of a fuel in air is __________ that in pure oxygen.
The maximum adiabatic flame temperature is attained, when the fuel is burnt with
Abel apparatus is used for those oils, whose flash points are___°F.
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of
Which of the following gaseous fuels is likely to have the highest gross calorific value?
Calorific value of tar is about __________ Kcal/kg.
Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.
Naphthalene recovered from coke oven gas is used
High temperature carbonisation of coal takes place at __________ °C.
A coal containing high amount of volatile matter will have
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.
With increases in carbonisation temperature
Critical Air Blast (CAB) value of coke is a direct measure of its
Which of the following is coking ?
Pick out the wrong statement.
Calorific value of wood gas is about __________ kcal/Nm3.
Power alcohol as compared to straight run gasoline has lower
Atomising steam to fuel oil ratio in a burner should be around
During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the
Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain
Which of the following has the highest calorific value ?
Bunsen burner is an example of a/an __________ burner.
Grindability index of a coal isIt implies that the
The cooling medium used in dry quenching of coke is
Naphthalene is removed from coke oven gas by
Coke oven gas compared to blast furnace gas is
Efficiency of the combustion of a fuel is judged by the __________ the flue gas.
The combustion reaction, C + O2 = CO2, is
For maximum discharge through a chimney, its height should be
Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called
Blast furnace gas burns with a bluish flame, because of the presence of
The function of secondary combustion air is to
Undercharging of coal in the by-product coke ovens results in
With increase in C/H ratio of a fuel, the dew point of flue gases
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