Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?

Question: ‘Wobbe index’ is a characteristic of
[A].

solid fuels

[B].

gaseous fuels

[C].

liquid fuels

[D].

fat coals

Answer: Option B

Explanation:

No answer description available for this question.

Question: A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the reminder going to CO, the Orsat analysis in volume percent is
[A].

CO2 : 6.26, CO : 1.56, O2 : 3.91, H2O :15.66, N2 : 72.60

[B].

CO2 : 7.42, CO : 1.86, O2 : 4.64, N2:86.02

[C].

CO2 : 6.39, CO : 1.60, O2 : 3.99, H2O:25.96, N2:72.06

[D].

CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74

Answer: Option B

Explanation:

No answer description available for this question.

Question: With increase in moisture content of coal, its
[A].

calorific value increases.

[B].

caking properties diminish.

[C].

swelling during carbonisation becomes excessive.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Benzene is used
[A].

as a motor fuel.

[B].

as an explosive.

[C].

for making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR).

[D].

as a perfume.

Answer: Option C

Explanation:

No answer description available for this question.