Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by whitelisting our website.

Author name: admin

As the equilibrium moisture content of the coal increases, its

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: As the equilibrium moisture content of the coal increases, its
[A].

calorific value increases.

[B].

swelling number decreases.

[C].

swelling number increases.

[D].

bulk density decreases.

Answer: Option B

Explanation:

No answer description available for this question.

As the equilibrium moisture content of the coal increases, its Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because
[A].

the hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot.

[B].

it reduces its calorific value tremendously.

[C].

it reduces its flame temperature tremendously.

[D].

there are chances of explosion during preheating.

Answer: Option A

Explanation:

No answer description available for this question.

Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

In an organization of pollution control board, engineers are represented by a circle, legal experts by a square and environmentalist by a triangle. Who is most represented in the board as shown in the following figure ?

Venn Diagrams, Verbal Reasoning /
Question: In an organization of pollution control board, engineers are represented by a circle, legal experts by a square and environmentalist by a triangle. Who is most represented in the board as shown in the following figure ?
[A].

Environmentalists

[B].

Legal Experts

[C].

Engineers with legal background

[D].

Environmentalists with Engineering background

Answer: Option D

Explanation:

Environmentalists with Engineering background is most represented in the board.

In an organization of pollution control board, engineers are represented by a circle, legal experts by a square and environmentalist by a triangle. Who is most represented in the board as shown in the following figure ? Read More »

Venn Diagrams, Verbal Reasoning

A coal with high ash content is undesirable, as

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: A coal with high ash content is undesirable, as
[A].

it is abrasive to the coal pulveriser (ie.g. ball mill) and the combustion chamber.

[B].

the ash in molten condition gets absorbed in the pores of the refractory lining of the furnace and causes its spalling due to different co-efficient of expansion/contraction of the refractory and the ash.

[C].

the ash retains the sulphur & phosphorus and thus affects the quality of products in metallurgical furnace apart from increasing the slag volume. Besides, it may fuse and stick to the boiler tubes thereby reducing the heat transfer.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

A coal with high ash content is undesirable, as Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

In the organised society of today no individual or nation can plough a lonely furrow.

Idioms And Phrases, Verbal Ability /
Question: In the organised society of today no individual or nation can plough a lonely furrow.
[A].

remain unaffected

[B].

do without the help of others

[C].

survive in isolation

[D].

remain non-aligned

Answer: Option B

Explanation:

No answer description available for this question.

In the organised society of today no individual or nation can plough a lonely furrow. Read More »

Idioms And Phrases, Verbal Ability

A coal having high amount of volatile matter

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: A coal having high amount of volatile matter
[A].

would require smaller combustion chamber.

[B].

produces very little of tar and gas on carbonisation.

[C].

ignites easily and burns with long smoky flame.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

A coal having high amount of volatile matter Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

Low temperature oxidation of stored coal results in the

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: Low temperature oxidation of stored coal results in the
[A].

decrease in its caking power & calorific value.

[B].

decrease in its carbon & hydrogen content.

[C].

increase in its oxygen content.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Low temperature oxidation of stored coal results in the Read More »

CHEMICAL ENGINEERING, Fuels and Combustion