Q.1
Pick out the wrong statement.
Q.2
The pyragallol solution used in orsat apparatus can absorb
Q.3
Too much of excess air in combustion results in high
Q.4
Catalyst used in Fischer-Tropsch process is
Q.5
Supply of excess air for complete combustion of fuel is necessitated to facilitate
Q.6
In high temperature carbonisation of coal compared to low temperature carbonisation
Q.7
Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
Q.8
During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the
Q.9
Which of the following is a primary fuel?
Q.10
Which of the following is not endothermic?
Q.11
Calorific value of wood gas is about __________ kcal/Nm³.
Q.12
Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm³.
Q.13
The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³.
Q.14
Gray King Assay and Swelling Index of a coal is a measure of its
Q.15
Use of preheated air for combustion of fuel in the furnace, increases the
Q.16
C.V. (kcal/Nm³) of gaseous fuels __________ with increase in molecular weight.
Q.17
The cuprous chloride used in orsat apparatus can absorb
Q.18
Mott and Wheeler test is conducted on coke to find its
Q.19
Main constituent of natural gas is
Q.20
Volatile matter content of metallurgical coke may be around __________ percent.
Q.21
Quantity of coke produced from metallurgical coal may be around __________ percent.
Q.22
Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm³ gas ?
Q.23
'Wobbe index' is a characteristic of
Q.24
In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by
Q.25
For maximum discharge through a chimney, its height should be
Q.26
Calorific value of dry wood may be around __________ Kcal/kg.
Q.27
Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called
Q.28
Abrasion index of blast furnace coke should be around __________ percent.
Q.29
Which of the following is not a binder for coal briquetting?
Q.30
Fuel consumption in coke making can be reduced by
Q.31
Blast furnace gas compared to coke oven gas has
Q.32
Combustion of pulverised coal as compared to that of lump coal
Q.33
Calorific value of bituminous coal may be around __________ Kcal/kg.
Q.34
Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.
Q.35
Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent.
Q.36
Increase in ash content of blast furnace coke
Q.37
Pick out the wrong statement.
Q.38
Natural draught produced by a chimney depends upon the
Q.39
During combustion of coal on grate, clinker formation is increased by the
Q.40
A good quality coal should have
Q.41
Calorific value of tar is about __________ Kcal/kg.
Q.42
Which of the following combustibles is absent in blast furnace gas?
Q.43
Which of the following would require maximum amount of % excess air for complete combustion?
Q.44
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.
Q.45
High sulphur content in a fuel __________ of the flue gases.
Q.46
Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C.
Q.47
In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the
Q.48
Pick out the wrong statement.
Q.49
Coke oven gas is stripped of its H₂S and mercaptans content by
Q.50
Which of the following has the highest flame speed?
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