Which will have the least volatile matter and hence will be the most difficult to ignite?

A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

A

Is less liable to spontaneous combustion on storage

B

Is more difficult to ignite and produces a shorter flame

C

Requires smaller combustion space and less secondary air

D

None of these

A coal with high __________ content will ignite most easily.

A

Hydrogen

B

Oxygen

C

Volatile matter

D

Fixed carbon

A coal with high __________ content, would ignite most easily.

A

Fixed carbon

B

Volatile matter

C

Ash

D

Oxygen

Correct synonym of the word 'ignite'---

A

kindle

B

to set fire

C

to burn

D

to burn fire

Correct synonym of the word " ignite" is

A

Kindle

B

to set fire

C

to burn

D

to burn fire

A coal having higher volatile matter content will necessarily have lower

A

Ash fusion temperature

B

Calorific value

C

Ignition temperature

D

Caking index

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

Underfeed stokers work best for __________ coals high in volatile matter and with caking tendency

A

Anthracite

B

Lignite

C

Semi-bituminous and bituminous

D

All of the above

Which of the following type of coal has the lowest proportion of volatile matter ?

A

Lignite

B

Peat

C

Bituminous

D

Anthracite

Volatile matter content of metallurgical coke may be around __________ percent.

A

1-2

B

10-15

C

22-26

D

30-33

Which will have the least volatile matter and hence will be the most difficult to ignite?

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