Related Questions

Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
A 1000
B 4000
C 6000
D 8000
Softening temperature of coal ash is a measure of the __________ of coal.
A Caking tendency
B Coking tendency
C Clinkering tendency
D Size stability
Which of the following types of coal represents the first stage of formation of coal?
A Anthracite
B Lignite
C Peat
D Bituminous
Which of the following varieties of coal accounts for the maximum coal output of the world?
A Peat
B Lignite
C Bituminous
D Anthracite
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
A Neutralised by alkali treatment
B Left as such without any treatment
C Diluted with fresh water to reduce its acidity
D None of these
In a thermal power plant, coal from the coal handling plant is moved to the boiler bunker through a
A Belt conveyor
B Bucket conveyor
C Fork lift truck
D Overhead crane
Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.
A Entrained
B Moving
C Fixed
D Fluidised
The Appalachian coal fields, one of the important coal fields in the world, are located in ________
A China
B Great Britain
C U.S.A.
D Russia
Combustion of pulverised coal as compared to that of lump coal
A Develops a non-luminous flame
B Develops a low temperature flame
C Can be done with less excess air
D Provides a lower rate of heat release
__________ of the coal is the basis for Seylor's coal classification.
A Proximate analysis
B Ultimate analysis
C Caking index
D Calorific value

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