Steam Boilers, Engines, Nozzles and Turbines By compounding the expansion of steam in two or more cylinders, the length of stroke Increases None of these Does not change Decreases Increases None of these Does not change Decreases ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value 1 + moisture content 1 – moisture content (1 + moisture content) (1- moisture content) 1 + moisture content 1 – moisture content (1 + moisture content) (1- moisture content) ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The chimney draught varies with Height of chimney All of these Climatic conditions Temperature of furnace gases Height of chimney All of these Climatic conditions Temperature of furnace gases ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Multi-stage steam turbines are of the Velocity compounded type Reaction type Pressure compounded type All of these Velocity compounded type Reaction type Pressure compounded type All of these 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 Natural draught Induced draught Forced draught Balanced draught Natural draught Induced draught Forced draught ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The critical pressure ratio is given by (where p₁ = Initial pressure of steam, and p₂ = Pressure of steam at throat or critical pressure) p₁/p₂ p₂/p₁ p₁ + p₂ p₁. p₂ p₁/p₂ p₂/p₁ p₁ + p₂ p₁. p₂ ANSWER DOWNLOAD EXAMIANS APP
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