Q.1
A coal with high ash content is undesirable, as
Q.2
Ignition temperature decreases progressively from anthracite to lignite, because
Q.3
Blast furnace gas is a very poisonous gas because of its predominantly high __________ content.
Q.4
Which of the following accentuates clinker-ing trouble on furnace grate burning coal?
Q.5
High temperature in gasification of coal favours
Q.6
Which of the following oil gasification processes is non-catalytic?
Q.7
Most of the coking coals are
Q.8
Coke oven gas compared to blast furnace gas is
Q.9
Coke oven gas burns with an yellowish flame, because of the presence of
Q.10
Blast furnace gas burns with a bluish flame, because of the presence of
Q.11
Which of the following fuels is generally not used in thermal power plant boiler firing?
Q.12
Bulk density of pulverised coal may be about __________ kg/m³.
Q.13
Fuel for a fast breeder nuclear reactor is
Q.14
The maximum adiabatic flame temperature in air as compared to that in pure oxygen is
Q.15
Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of
Q.16
Percentage of carbon monoxide in blast furnace gas may be around
Q.17
About __________ Nm³ of air will be required for the complete combustion of 2Nm³ of CO.
Q.18
High pressure coal gasification is employed in __________ process.
Q.19
In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.
Q.20
With increase in C/H ratio of a fuel, the amount of CO₂ formed on its complete combustion
Q.21
Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm³.
Q.22
Calorific value of furnace oil is about __________ Kcal/kg.
Q.23
With increase in C/H ratio of a fuel, the dew point of flue gases
Q.24
Which of the following is not a 'manufactured' fuel?
Q.25
Laboratory gas is obtained by the cracking of
Q.26
Coke oven gas consists mainly of
Q.27
Kopper-Totzek coal gasifier
Q.28
__________ prohibits the use of alcohols directly in petrol engines.
Q.29
Gross and net calorific value of a fuel will be the same
Q.30
Lignite is
Q.31
Which of the following is called "blue gas"?
Q.32
Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal?
Q.33
Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.
Q.34
Coal tar (produced by high temperature carbonisation) is the main source of
Q.35
The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to
Q.36
(64-132) rank coal (ASTM) means a coal with 64%
Q.37
(64-132) rank coal (ASTM) means a coal with 64%
Q.38
The calorific value of L.D. converter gas is about __________ Kcal/Nm³ .
Q.39
Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of
Q.40
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation
Q.41
Which of the following is not a by-product fuel?
Q.42
Percentage of hydrogen in coke oven gas may be around
Q.43
Percentage of methane in coke oven gas may be around
Q.44
Out of the following fuels, the difference between gross and net calorific value will be minimum in case of
Q.45
Desirable "Micum Index" values of metal-lurical coke are
Q.46
Low temperature carbonisation
Q.47
Percentage of nitrogen in blast furnace gas may be around
Q.48
Largest constituent of blast furnace gas is
Q.49
Mineral matter content (M) and ash content (A) in coal are approximately related as
Q.50
Coke compared to the coal from which it has been made, contains
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