Steam Boilers, Engines, Nozzles and Turbines The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle) Vb = 0.5 V² cosα Vb = V² cosα Vb = 0.5 V cosα Vb = V cosα Vb = 0.5 V² cosα Vb = V² cosα Vb = 0.5 V cosα Vb = V cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines On Millier chart, the constant pressure lines Are equally spaced throughout Diverge from left to right Diverge from right to left First rise up and then fall Are equally spaced throughout Diverge from left to right Diverge from right to left First rise up and then fall ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required. More None of the listed here Less Equal More None of the listed here Less Equal ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Which of the following boilers is best suited to meet fluctuating demands? Cochran Babcock and Wilcox Locomotive Lancashire Cochran Babcock and Wilcox Locomotive Lancashire 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 Induced draught Forced draught Balanced draught Natural draught Induced draught Forced draught Balanced draught Natural draught ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Pulverized fuel is used for More calorific value Better burning Less radiation loss Medium sized units More calorific value Better burning Less radiation loss Medium sized units ANSWER DOWNLOAD EXAMIANS APP
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