Fuels and Combustion Prime coking coal is always blended with medium or non- coking coal before ear-bonisation Both A & B Because, it alone produces unreactive coke Neither A nor B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Both A & B Because, it alone produces unreactive coke Neither A nor B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Power alcohol as compared to straight run gasoline has lower Calorific value Viscosity Specific gravity Octane number Calorific value Viscosity Specific gravity Octane number ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Flue gas discharge velocity through chimney of a big thermal power plant may be around __________ m/sec. 0.5 10 500 50 0.5 10 500 50 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coking time in beehive coke oven is about 12 hours One week Two weeks 2-3 days 12 hours One week Two weeks 2-3 days ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm³. 6500 4000 2500 10000 6500 4000 2500 10000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal during its high temperature carbonisation Increases the loss of fine coal dust from the ovens when charging Reduces the coking time Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls None of these Increases the loss of fine coal dust from the ovens when charging Reduces the coking time Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls None of these ANSWER DOWNLOAD EXAMIANS APP
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