3387. Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is
H₂
CH₄
CO₂
N₂
✅ The correct answer is option B.
3392. Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter.
Bomb
Boy’s
Junkar’s
None of these
✅ The correct answer is option A.
3397. Volatile matter content in coking coal may be about __________ percent.
1
7
22
46
✅ The correct answer is option C.
3404. In Lurgi coal gasifier,
Coking coals cannot be used
Low carbon conversion efficiency is achieved
Entrainment of solids is higher
Larger quantity of coal can be processed
✅ The correct answer is option D.
3371. One kg of carbon for theoretically complete combustion requires __________ kg of air.
11.5
0.5
23
12
✅ The correct answer is option A.
3374. Insitu theory and drift theory are related to the
Origin of petroleum oil
Origin of coal
Coalification
Variation of coal quality with depth
✅ The correct answer is option B.
3378. Carbon Content by weight in air dried wood may be about __________ percent.
10
25
50
80
✅ The correct answer is option C.
3382. Percentage of hydrogen in coke oven gas may be around
10
25
45
60
✅ The correct answer is option D.
3388. Ignition temperature decreases progressively from anthracite to lignite, because
Volatile matter content increases
Carbon content decreases
Moisture content increases
Ash content increases
✅ The correct answer is option A.
3393. High sulphur content in a fuel __________ of the flue gases.
Decreases the dew point
Increases the dew point
Reduces the combustion efficiency by limiting the permissible temperature reduction
Both B & C
✅ The correct answer is option D.