The proper indication of incomplete combustion is

__________ the exhaust gas is an indication of the incomplete combustion of fuel.

A

Low temperature of

B

High temperature of

C

High % of CO in

D

High % of CO₂ in

During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the

A

Incomplete combustion

B

Complete combustion

C

High oxygen in flue gas

D

None of these

Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

A

CO content

B

Dew point

C

CO₂ content

D

O₂ content

Incomplete combustion can be best judged by

A

Smoky chimney exit

B

Excess air in flue gases

C

Measuring carbon monoxide in flue gases

D

Measuring temperature of flue gases at exit of furnace

When incomplete combustion loss is high, the flue gas analysis shows large amount of

A

CO₂

B

CO

C

O₂

D

C

Incomplete combustion of a fuel is characterised by the high __________ in the flue gas.

A

Smoke

B

Temperature

C

Oxygen

D

Carbon monoxide

The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.

A

Pulverised fuel

B

Travelling grate stoker firing

C

Circulating fluidised bed

D

Fluidised bed

The combustion efficiency of a gas turbine using perfect combustion chamber is of the order of

A

75%

B

85%

C

90%

D

99%

In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as

A

Scavenging

B

Detonation

C

Supercharging

D

Polymerisation

Use of excess of combustion air in the combustion of fuels results in

A

Heat losses

B

Long flame

C

Condensation of water vapour from the fuel gas

D

None of these

The proper indication of incomplete combustion is

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