Fuels and Combustion

Question: Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.
[A].

entrained

[B].

moving

[C].

fixed

[D].

fluidised

Answer: Option A

Explanation:

No answer description available for this question.

Question: A good metallurgical coke should have very low
[A].

sulphur & phosphorous content

[B].

porosity

[C].

fusion point of its ash

[D].

hardness & strength

Answer: Option A

Explanation:

No answer description available for this question.

Question: Fossil fuels mean
[A].

solid fuels

[B].

liquid fuels

[C].

those fuels which are found in the crust of earth.

[D].

premature fuels with low calorific value.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C.
[A].

80-170

[B].

200-300

[C].

250-270

[D].

280-300

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.
[A].

400-500

[B].

900-1000

[C].

1400-1500

[D].

1700-1800

Answer: Option B

Explanation:

No answer description available for this question.

Question: Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the
[A].

decolourisation of sugar.

[B].

solvent recovery from air and gases

[C].

absorption of gases and vapor.

[D].

electrode manufacture.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Laboratory gas is obtained by the cracking of
[A].

gasoline

[B].

diesel

[C].

fuel oil

[D].

kerosene

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ is used as jet engine fuel.
[A].

Petrol

[B].

Diesel

[C].

Kerosene

[D].

LPG

Answer: Option C

Explanation:

No answer description available for this question.

Question: Octane number of 2, 2, 4 – trimethyl pen-tane is
[A].

0

[B].

100

[C].

in between 0 and 100

[D].

more than 100

Answer: Option B

Explanation:

No answer description available for this question.

Question: Bomb calorimeter is used to determine the (where, GCV – Gross Calorific Value. NCV – Net Calorific Value.)
[A].

GCV at constant pressure.

[B].

GCV at constant volume.

[C].

NCV at constant pressure.

[D].

NCV at constant volume.

Answer: Option B

Explanation:

No answer description available for this question.