Removal of hydrogen from coke oven gas
Main use of hard coke produced by high temperature carbonisation is in the
Quantity of coke produced from metallurgical coal may be around __________ percent.
Weathering of coal during storage causes
Which of the following is called "blue gas" ?
Which of the following is not applicable to fluidised bed combustion of coal ?
Which of the following has the highest gross calorific value ?
A coal having higher volatile matter content will necessarily have lower
Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the
Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.
Bomb calorimeter is used for the determination of calorific value of the __________ fuels.
As the C/H ratio of the fuel increases, the amount of CO2 formed on combustion __________ for the same percentage of excess air.
Largest constituent of blast furnace gas is
With increase in moisture content of coal, its
Main constituent of natural gas is
Blast furnace gas compared to coke oven gas has
Coke oven gas burns with an yellowish flame, because of the presence of
Benzene is used
If oxygen content in the flue gas rises too high, fuel is being wasted by
Hard pitch is used for making
Which of the following fuels has the highest calorific value per unit mass (kcal/kg) ?
With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases.
Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.
Out of the following fuels, the difference between gross and net calorific value will be minimum in case of
Coking time in a commercial high temperature coal carbonisation plant is about __________ hours.
With increase in the temperature of carbonisation of coal
Which of the following is not a by-product fuel?
Caking index of a coal is a measure of its
Calorific value of furnace oil is about __________ Kcal/kg.
Coal containing large quantity of __________ are difficult to wash.
Which of the following can be made into briquettes without the use of a binder ?
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt withexcess air. The flue gas still contains large amount of carbon monoxide. This may be due to the
Pick out the wrong statement.
The most matured coal out of the following is
Which of the following fuel gases has the highest calorific value ?
Out of the following, which is the most important parameter for the blast furnace grade coke ?
For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will
The calorific value of natural gas is about __________ kcal/Nm3.
The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.
A carbonaceous fuel (containing no H2 or hydrocarbons) is burnt and the resulting flue gas containsCO2. It means that
Preheating of __________ the flame temperature.
A sample of natural gas containingmethane (CH4) and rest nitrogen (N2) is burnt withexcess air. Withof the combustibles producing CO2 and the reminder going to CO, the Orsat analysis in volume percent is
Increase in ash content of blast furnace coke
Supply of excess air for complete combustion of fuel is necessitated to facilitate
During its calorific value determination by bomb calorimeter, coal is combusted by
Fuel for a fast breeder nuclear reactor is
Which of the following has the least calorific value (kcal/Nm3) ?
Lignite is
Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent.
The main product of high temperature carbonisation of coal is
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