Steam Boilers, Engines, Nozzles and Turbines Hard coke is produced by carburization of coal at Atmospheric temperature 700-850°C 950-1100°C 500-600°C Atmospheric temperature 700-850°C 950-1100°C 500-600°C ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as Efficiency of the boiler Power of the boiler Efficiency of the chimney Efficiency of the fan Efficiency of the boiler Power of the boiler Efficiency of the chimney Efficiency of the fan ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The pressure at which latent heat of vaporisation of water is zero, is 1 kg/cm² Below atmospheric pressure 225.6 kg/cm² 100 kg/cm² 1 kg/cm² Below atmospheric pressure 225.6 kg/cm² 100 kg/cm² ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of High calorific value coal being burnt Fouling of heat transfer surfaces Raising of steam temperature Higher effectiveness of boiler High calorific value coal being burnt Fouling of heat transfer surfaces Raising of steam temperature Higher effectiveness of boiler ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The artificial draught is produced by Both (A) and (B) Centrifugal fan Steam jet Chimney Both (A) and (B) Centrifugal fan Steam jet Chimney ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Maximum energy loss in a boiler occurs due to Unburnt carbon in ash Ash content Flue gases Incomplete combustion Unburnt carbon in ash Ash content Flue gases Incomplete combustion ANSWER DOWNLOAD EXAMIANS APP
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