Fuels and Combustion Pulverised coal used in boiler firing need not have High fusion point of its ash Lower ash content Less moisture content High bulk density High fusion point of its ash Lower ash content Less moisture content High bulk density ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal. Fast & high Slow & low Slow & high Fast & slow Fast & high Slow & low Slow & high Fast & slow ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C. 145 70 105 85 145 70 105 85 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following has the highest calorific value (kcal/Nm³) ? Gobar gas Natural gas Carburetted water gas LPG Gobar gas Natural gas Carburetted water gas LPG ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Higher percentage of ash in coal meant for the production of metallurgical grade coke Decreases the abrasion resistance of coke Causes brittleness in steel None of these Decreases the hardness of coke Decreases the abrasion resistance of coke Causes brittleness in steel None of these Decreases the hardness of coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal compared to the lumpy coal Facilitates combustion with lower excess air Provides better control of furnace temperature All of these Provides higher thermal efficiency & flame temperature Facilitates combustion with lower excess air Provides better control of furnace temperature All of these Provides higher thermal efficiency & flame temperature ANSWER DOWNLOAD EXAMIANS APP
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