Which of the following has the highest flame speed ?

Question: Low temperature carbonisation
[A].

is mainly for producing the smokeless domestic coke.

[B].

is meant for the production of ‘metallurgical coke’.

[C].

produces higher quantity of gas than high temperature carbonisation.

[D].

produces less quantity of tar than high temperature carbonisation.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Desirable “Micum Index” values of metal-lurical coke are
[A].

M40 > 78% and M10 < 10%.

[B].

M40 > 4% and M10 < 80%.

[C].

M40 > 10% and M10 < 78%.

[D].

M40 > 98% and M10 < 2%.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gobar gas is produced by the __________ of cown dung.
[A].

fermentation

[B].

oxidation

[C].

hydrogenation

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Bulk density of pulverised coal may be about __________ kg/m3.
[A].

100

[B].

500

[C].

1000

[D].

1500

Answer: Option B

Explanation:

No answer description available for this question.

Question: Combustion of pulverised fuel
[A].

requires larger combustion chamber than rich gaseous fuel.

[B].

in a metallurgical furnace does not contaminate the product in the furnace by ash from fuel.

[C].

suppresses the discharge of fine dust and grit into atmosphere

[D].

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

Answer: Option A

Explanation:

No answer description available for this question.

Question: Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C.
[A].

sensible

[B].

latent

[C].

sensible and latent

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.