Fussain | EXAMIANS

Fuels and Combustion
Fussain

Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal

Is friable, charcoal like substance

All of these

Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation

Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal

Is friable, charcoal like substance

All of these

Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation

ANSWER DOWNLOAD EXAMIANS APP

Fuels and Combustion
Sometimes water is sprayed during coal charging in the coke oven, which helps in

Controlling the dust nuisance while charging the coal

Prevention of clinker formation in the oven

Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)

All of these

Controlling the dust nuisance while charging the coal

Prevention of clinker formation in the oven

Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)

All of these

ANSWER DOWNLOAD EXAMIANS APP

Fuels and Combustion
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls

Because, it alone produces unreactive coke

Both A & B

Neither A nor B

To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls

Because, it alone produces unreactive coke

Both A & B

Neither A nor B

ANSWER DOWNLOAD EXAMIANS APP

Fuels and Combustion
With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases.

Unsaturated hydrocarbons

Hydrogen

All of these

Methane

Unsaturated hydrocarbons

Hydrogen

All of these

Methane

ANSWER DOWNLOAD EXAMIANS APP

Fuels and Combustion
Coal tar (produced by high temperature carbonisation) is the main source of

Alphatic compounds

Aromatic compounds

Paraffins

Olefins

Alphatic compounds

Aromatic compounds

Paraffins

Olefins

ANSWER DOWNLOAD EXAMIANS APP

Fuels and Combustion
Fuel combustion is never cent per cent efficient due to

All of these

Moisture loss

Incomplete combustion

Dry gas/stack gas loss

All of these

Moisture loss

Incomplete combustion

Dry gas/stack gas loss

ANSWER DOWNLOAD EXAMIANS APP

Fuels and Combustion

Fuels and Combustion Fussain

Fuels and Combustion Sometimes water is sprayed during coal charging in the coke oven, which helps in

Fuels and Combustion Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

Fuels and Combustion With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases.

Fuels and Combustion Coal tar (produced by high temperature carbonisation) is the main source of

Fuels and Combustion Fuel combustion is never cent per cent efficient due to

Fuels and Combustion
Fussain

Fuels and Combustion
Sometimes water is sprayed during coal charging in the coke oven, which helps in

Fuels and Combustion
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

Fuels and Combustion
With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases.

Fuels and Combustion
Coal tar (produced by high temperature carbonisation) is the main source of

Fuels and Combustion
Fuel combustion is never cent per cent efficient due to