A. Humidity of combustion air
B. Moisture content of fuel
C. Both A. and B.
D. The water formed by combustion reaction
Related Mcqs:
- A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the ‘carpet loss’. The carpet loss may be of the order of ______________ cms?
A. 1 to 2
B. 3 to 4
C. 5 to 15
D. 20 to 40 - Caking index of a coal is a measure of its _______________________?
A. Abradability
B. Reactivity
C. Agglutinating (binding) properties
D. Porosity - Producer gas comprises mainly of _______________________?
A. CO & N2
B. CO & H2
C. CO2 & N2
D. CO2 & H2 - Presence of free moisture in coal is most disadvantageous during_________________?
A. Its pulverisation (as it requires more power)
B. Combustion of fire slacks on the grates
C. Handling (e.g. when emptying wagons)
D. None of these - With increase in moisture content of coal, its___________________?
A. Calorific value increases
B. Caking properties diminish
C. Swelling during carbonisation becomes excessive
D. None of these - With increase in moisture content of coal, its_____________________?
A. Calorific value increases sometimes
B. Bulk density always decreases
C. Clinkering tendency during combustion increases
D. None of these - As the equilibrium moisture content of the coal increases, its___________________?
A. Calorific value increases
B. Swelling number decreases
C. Swelling number increases
D. Bulk density decreases - Presence of free moisture in coal during its high temperature carbonisation _____________________?
A. Reduces the coking time
B. Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot
oven walls
C. Increases the loss of fine coal dust from the ovens when charging
D. None of these - Presence of force moisture in coal is most disadvantageous during its __________________?
A. Transportation and handling
B. Washing
C. Pulverisation
D. Storage - Calorific values of both the solid as well as the liquid fuels can be determined by ______________ calorimeter?
A. Bomb
B. Boy’s
C. Junkers
D. None of these
