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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Locomotive boiler is of the following type

Internally fired
Multi tubular
Horizontal
All of the listed here

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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

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Steam Boilers, Engines, Nozzles and Turbines
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

640/3 m/s
160/3 m/s
320/3 m/s
640 m/s

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Steam Boilers, Engines, Nozzles and Turbines
Throttle governing of steam engines is a method of controlling the engine output by varying

Volume of intake steam
Temperature of intake steam
All of these
Pressure of intake steam

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Steam Boilers, Engines, Nozzles and Turbines
The length of Cornish boiler varies from

2 to 4.5 m
5 to 7.5 m
3 to 5 m
7 to 9 m

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially dry saturated steam is

0.601
0.577
0.582
0.546

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