Dankuni (West Bengal)
Dhanbad
Singreni (AP.)
Raniganj
✅ The correct answer is option A.
Engineering
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3152. Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.
5
25
55
75
✅ The correct answer is option B.
3153. Coke oven gas constitutes mainly of
H₂ & CO
H₂ & CH₄
CH₄ & CO
H₂ & CO₂
✅ The correct answer is option B.
3154. Out of the following fuels, the difference between gross and net calorific value will be minimum in case of
Coke oven gas
Water gas
Natural gas
Blast furnace gas
✅ The correct answer is option D.
3155. Which of the following is a lean fuel gas?
Coke oven gas
LPG
Blast furnace gas
Natural gas
✅ The correct answer is option C.
3156. Fuel combustion is never cent per cent efficient due to
Incomplete combustion
Dry gas/stack gas loss
Moisture loss
All of the above
✅ The correct answer is option D.
3157. Orsat apparatus
Gives flue gas analysis on dry basis
Determines N₂ in flue gas indirectly
Can
All of the above
✅ The correct answer is option D.
3158. Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.
3 & 10
10 & 3
10 & 20
15 & 8
✅ The correct answer is option B.
3159. Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?
Multicyclones
Bag filter
Wet scrubber
Hydrocyclones
✅ The correct answer is option B.
3160. Main constituents of benzol are
Benzene, toluene & xylene
Tar & creosote
Ammonia & phenol
Anthracene & phenol
✅ The correct answer is option A.