Fuels and Combustion During the carbonisation of coal Hard semi-coke starts shrinking at 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C All tar is evolved at < 600°C All of these Hard semi-coke starts shrinking at 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C All tar is evolved at < 600°C All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Benzene is used As a motor fuel As a perfume For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR) As an explosive As a motor fuel As a perfume For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR) As an explosive ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Compound coke ovens are those which can be heated by Rich gas (e.g., coke oven gas) Both B and C Both steam and electrical power Lean gas (e.g., B.F. gas) Rich gas (e.g., coke oven gas) Both B and C Both steam and electrical power Lean gas (e.g., B.F. gas) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Turndown ratio of a gas burner is equal to the Minimum to maximum heat input ratio Maximum to minimum permissible gas flow rate Both A & B Maximum to minimum heat input ratio Minimum to maximum heat input ratio Maximum to minimum permissible gas flow rate Both A & B Maximum to minimum heat input ratio ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use. 70-100 15-30 43832 150-200 70-100 15-30 43832 150-200 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Natural draft created by the chimney depends upon Neither A nor B Both A & B Temperature of the flue gas Its height Neither A nor B Both A & B Temperature of the flue gas Its height ANSWER DOWNLOAD EXAMIANS APP
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