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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a reaction turbine is

(1 + cos²α)/2 cos²α
2 sin²α/(1 + sin²α)
2 cos²α/(1 + cos²α)
(1 + sin²α)/2 sin²α

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Steam Boilers, Engines, Nozzles and Turbines
The rate of discharge through the nozzle ___ when the exit pressure is gradually reduced.

Remains same
Increases
Decreases
None of the listed here

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of Rankine cycle can be increased by

Increasing exhaust pressure
Decreasing exhausts pressure
Increasing the expansion ratio
Decreasing initial steam pressure and temperature

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Steam Boilers, Engines, Nozzles and Turbines
A stage, in reaction turbine, is represented by

Number of exits of steam
Number of entries of steam
Number of casing
Each row of blades

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Steam Boilers, Engines, Nozzles and Turbines
Evaporative capacity of boiler is expressed as

kg of fuel fired
kg of steam produced per kg of fuel fifed
Steam pressure produced
kg of steam produced

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Steam Boilers, Engines, Nozzles and Turbines
The chimney draught varies with

Height of chimney
Temperature of furnace gases
Climatic conditions
All of these

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