Related Questions

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
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
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
Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A 5 : 8
B 10 : 9
C 8 : 5
D 9 : 10
For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will
A Increase
B Decrease
C Increase or decrease depending on the fuel type
D Not change
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
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
With increase in calorific value of fuels, their adiabatic flame temperatures
A Increase
B Decrease
C Remain unchanged
D May increase or decrease ; depends on the quantity of products of combustion
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because
A Water has a high latent heat of evaporation
B Lewis number is close to unity
C They are always equal under all circumstances
D Solubility of the components of air in water is very small

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