Steam Boilers, Engines, Nozzles and Turbines By compounding the expansion of steam in two or more cylinders, the ratio of expansion Does not change Decreases Increases None of these Does not change Decreases Increases None of these ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The radius of a dished head is taken approximately as Two One Half One fourth Two One Half One fourth 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 p₁ + p₂ p₁/p₂ p₂/p₁ p₁. p₂ p₁ + p₂ p₁/p₂ p₂/p₁ ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Duplex feed pumps are used in small steam boilers. These operate on the principle of Axial flow pump Reciprocating pump Gear pump Centrifugal pump Axial flow pump Reciprocating pump Gear pump Centrifugal pump 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 Natural draught Balanced draught Forced draught Induced draught Natural draught Balanced draught Forced draught Induced draught ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Green coal, in order to be burnt, must be Heated sufficiently Burnt as powder Burnt in excess air Heated to its ignition point Heated sufficiently Burnt as powder Burnt in excess air Heated to its ignition point ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS