Question: Efficient burning of anthracite coal requires
[A].low preheat of air.
fine grinding.
high excess air.
all (a), (b) and (c).
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Fuels and Combustion
Low temperature oxidation of coal resulting from bad storage conditions does not decrease its
Question: Low temperature oxidation of coal resulting from bad storage conditions does not decrease its
[A].caking power
calorific value
hydrogen content
oxygen content
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Out of the following fuels, the difference between the net and gross calorific value is maximum in case of
Question: Out of the following fuels, the difference between the net and gross calorific value is maximum in case of
[A].pitch
fuel oil
blast furnace gas
bituminous coal
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent.
Question: Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent.
[A].6
12
18
24
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
For every 10% increase in the excess air; the fuel consumption increases by __________ percent.
Question: For every 10% increase in the excess air; the fuel consumption increases by __________ percent.
[A].0.1
2
5
10
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Atomising steam to fuel oil ratio in a burner should be around
Question: Atomising steam to fuel oil ratio in a burner should be around
[A].0.5
1.5
2.5
3.5
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Most of the coking coals are
Question: Most of the coking coals are
[A].anthracite
bituminous
lignite
none of these
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Dry air requirement for burning 1 Nm3 of CO to CO2 may be around __________ Nm3.
Question: Dry air requirement for burning 1 Nm3 of CO to CO2 may be around __________ Nm3.
[A].2.4
1.75
0.87
11.4
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Dry air required to burn 1 kg of carbon completely may be around __________ kg.
Question: Dry air required to burn 1 kg of carbon completely may be around __________ kg.
[A].11
2
20
38
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Combustion of pulverised coal as compared to that of lump coal
Question: Combustion of pulverised coal as compared to that of lump coal
[A].develops a non-luminous flame.
develops a low temperature flame.
can be done with less excess air.
provides a lower rate of heat release.
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.