Steam Boilers, Engines, Nozzles and Turbines Which is not the correct statement about moisture in coal? It increases thermal efficiency Inherent moisture and surface moisture are different things In some coals moisture may be present up to 40% Some moisture in coal helps in better burning which is not possible with completely dry coal It increases thermal efficiency Inherent moisture and surface moisture are different things In some coals moisture may be present up to 40% Some moisture in coal helps in better burning which is not possible with completely dry coal ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The fire tubes in a Cochran boiler usually have _________ diameter. 72.5 mm 62.5 mm 6.25 mm 92.5 mm 72.5 mm 62.5 mm 6.25 mm 92.5 mm ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency) ηS = ηB / ηN ηS = ηB × ηN ηS = ηN / ηB None of the listed here ηS = ηB / ηN ηS = ηB × ηN ηS = ηN / ηB None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called Balanced draught Forced draught Natural draught Induced draught Balanced draught Forced draught Natural draught Induced draught ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop Increases Is unpredictable Remains the same Decreases Increases Is unpredictable Remains the same Decreases ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A stage, in reaction turbine, is represented by Number of exits of steam Number of casing Number of entries of steam Each row of blades Number of exits of steam Number of casing Number of entries of steam Each row of blades ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS