For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will

The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.

A

Lower than

B

Higher than

C

Same as

D

Not related to

The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.

A

Lower than

B

Higher than

C

Same as

D

Not related to

Actual flame temperature is always lower than the adiabatic flame temperature, because there is

A

No possibility of obtaining complete combustion at high temperature

B

Always loss of heat from the flame

C

Both A & B

D

Neither A nor B

Adiabatic flame temperature of a fuel is dependent on the initial temperature of

A

Fuel

B

Air

C

Both A & B

D

Neither A nor B

Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt 'using theoretical amount of air in

A

Air

B

Oxygen

C

Either A or B

D

Either A or C without gain or loss of heat

The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always

A

1

B

> 1

C

Unpredicatable

The maximum adiabatic flame temperature is attained, when the fuel is burnt with

A

Theoretically required amount of air

B

More than theoretically required amount of air

C

Less than theoretically required amount of air

D

Theoretically required amount of oxygen

The maximum adiabatic flame temperature in air as compared to that in pure oxygen is

A

Much lower

B

Much higher

C

Same

D

Either lower or higher, depends on the type of fuel

If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be

A

Low

B

High

C

Very high, if the fuel is of low calorific value

D

None of these

Deficiency of combustion air during combustion of a gaseous fuel

A

Lengthens the flame

B

Causes heat loss of fuel by its partial combustion

C

Both A & B

D

Shortens the flame

For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will

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