Increase
Decrease
Increase or decrease depending on the fuel type
Not change
✅ The correct answer is option B.
Engineering
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3002. Which of the following can be made into briquettes without the use of a binder?
Lignite
Bituminous coal
Anthracite coal
None of these
✅ The correct answer is option A.
3003. Use of pulverised coal in boiler furnace provides
High calorific value
Better combustion
Smokeless burning
Less erosion on furnace walls
✅ The correct answer is option B.
3004. Removal of hydrogen from coke oven gas
Increases its calorific value
Decreases its calorific value
Does not alter its calorific value
Is not possible on commerical scale
✅ The correct answer is option A.
3005. Coking time in narrow by-product coke ovens is around __________ hours.
18
48
8
80
✅ The correct answer is option A.
3006. Which of the following fuels is generally not used in thermal power plant boiler firing?
Furnace oil, light diesel oil and tar/PCM
Pulverised coking coal
Coal middling from washeries
B.F. gas, coke oven gas and L.converter gas
✅ The correct answer is option B.
3007. Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about
8800 kcal/m³
8800 kcal/kg
Same as that of coal middling
25000 kcal/kg
✅ The correct answer is option B.
3008. White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is
Tar
Coke oven gas
Pitch
Pulverised coke
✅ The correct answer is option B.
3009. Number of macrocomponents present in coal according to Stopes are
Four
Five
Six
Two
✅ The correct answer is option A.
3010. Caking index of the coal blend used for the manufacture of metallurgical coke should be around
5
21
40
48
✅ The correct answer is option B.