Fuels and Combustion Turndown ratio of a gas burner is equal to the 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 Minimum to maximum heat input ratio Maximum to minimum permissible gas flow rate 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. 150-200 43832 70-100 15-30 150-200 43832 70-100 15-30 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of nitrogen in combustion air does not reduce the Flue gas temperature Flame temperature Amount of heat liberated Any of the above Flue gas temperature Flame temperature Amount of heat liberated Any of the above ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Producer gas containing least amount of tar is produced by the Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier) Partial combustion of coal Partial combustion of large size (< 50 mm) coke High pressure gasification of coal (e.g. in Lurgi gasifier) Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier) Partial combustion of coal Partial combustion of large size (< 50 mm) coke High pressure gasification of coal (e.g. in Lurgi gasifier) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Use of preheated air for combustion of fuel in the furnace, increases the None of these Flame temperature Scale losses of the furnace stock Calorific value of the fuel None of these Flame temperature Scale losses of the furnace stock Calorific value of the fuel ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During the carbonisation of coal Evolution of H₂ and formation of methane and aromatics occur at > 700°C All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C All of these ANSWER DOWNLOAD EXAMIANS APP
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