Steam Boilers, Engines, Nozzles and Turbines The diameter of a cylindrical shell of a Scotch marine boiler varies from 3.5 to 4.5 m None of these 1.5 to 2 m 2.5 to 3.5 m 3.5 to 4.5 m None of these 1.5 to 2 m 2.5 to 3.5 m ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as Injector Superheater Economizer Air-preheater Injector Superheater Economizer Air-preheater ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Incomplete combustion can be best judged by Measuring carbon monoxide in flue gases Excess air in flue gases Smoky chimney exit Measuring temperature of flue gases at exit of furnace Measuring carbon monoxide in flue gases Excess air in flue gases Smoky chimney exit Measuring temperature of flue gases at exit of furnace ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In designing air preheaters, the important design consideration is that Approach temperature should be as low as possible Stack gases should not be cooled to the dew point Handling and maintenance should be easier Heat transfer area should be optimum Approach temperature should be as low as possible Stack gases should not be cooled to the dew point Handling and maintenance should be easier Heat transfer area should be optimum ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Which of the following gases has the highest calorific value? Coal gas Water gas Blast furnace gas Producer gas Coal gas Water gas Blast furnace gas Producer gas ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will Improve Worsen Remain unaffected May improve/worsen depending on size Improve Worsen Remain unaffected May improve/worsen depending on size ANSWER DOWNLOAD EXAMIANS APP
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