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 p₂/p₁ p₁. p₂ p₁/p₂ p₁ + p₂ p₂/p₁ p₁. p₂ ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In designing air preheaters, the important design consideration is that Stack gases should not be cooled to the dew point Heat transfer area should be optimum Handling and maintenance should be easier Approach temperature should be as low as possible Stack gases should not be cooled to the dew point Heat transfer area should be optimum Handling and maintenance should be easier Approach temperature should be as low as possible ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure. Less than None of these Equal to Higher than Less than None of these Equal to Higher than ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The effect of super-saturation is that the Exit velocity of steam reduces Mass of the steam discharged increases All of these Entropy and specific volume of the steam increases Exit velocity of steam reduces Mass of the steam discharged increases All of these Entropy and specific volume of the steam increases ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The artificial draught is produced by Both (A) and (B) Steam jet Chimney Centrifugal fan Both (A) and (B) Steam jet Chimney Centrifugal fan ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The fire tubes in a Locomotive boiler has __________ diameter. 5.47 mm 7.45 mm 4.75 mm 47.5 mm 5.47 mm 7.45 mm 4.75 mm 47.5 mm ANSWER DOWNLOAD EXAMIANS APP
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