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Question: Atomising steam to fuel oil ratio in a burner should be around
[A].

0.5

[B].

1.5

[C].

2.5

[D].

3.5

Answer: Option A

Explanation:

No answer description available for this question.

Question: Most of the coking coals are
[A].

anthracite

[B].

bituminous

[C].

lignite

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Dry air requirement for burning 1 Nm3 of CO to CO2 may be around __________ Nm3.
[A].

2.4

[B].

1.75

[C].

0.87

[D].

11.4

Answer: Option A

Explanation:

No answer description available for this question.

Question: Dry air required to burn 1 kg of carbon completely may be around __________ kg.
[A].

11

[B].

2

[C].

20

[D].

38

Answer: Option A

Explanation:

No answer description available for this question.

Question: Combustion of pulverised coal as compared to that of lump coal
[A].

develops a non-luminous flame.

[B].

develops a low temperature flame.

[C].

can be done with less excess air.

[D].

provides a lower rate of heat release.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Coke oven gas is a better fuel than blast furnace gas, because of its higher
[A].

calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity).

[B].

adiabatic flame temperature.

[C].

heat release rate (thus requiring smaller combustion chamber).

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: A gaseous fuel in order to develop luminousity on burning, must contain
[A].

carbon monoxide

[B].

hydrocarbons

[C].

hydrogen

[D].

oxygen

Answer: Option B

Explanation:

No answer description available for this question.

Question: During combustion of gaseous fuels, deficiency of air
[A].

lengthens the flame.

[B].

tends to shorten the flame.

[C].

does not affect the flame length.

[D].

increases the flame temperature.

Answer: Option A

Explanation:

No answer description available for this question.

Question: A coal containing high amount of volatile matter will have
[A].

low ignition temperature

[B].

very little ash content

[C].

high fusion point of its ash

[D].

low adiabatic flame temperature

Answer: Option A

Explanation:

No answer description available for this question.