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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The flow through a nozzle is regarded as

Isothermal flow
Constant pressure flow
Constant volume flow
Isentropic flow

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Steam Boilers, Engines, Nozzles and Turbines
There is always some steam left in the clearance space from the previous stroke. This steam left in the clearance space is called

Wet steam
Saturated steam
Cushion steam
Superheated steam

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in a Cochran boiler usually have _________ diameter.

92.5 mm
72.5 mm
62.5 mm
6.25 mm

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Steam Boilers, Engines, Nozzles and Turbines
De-Laval turbines are mostly used

Where low speeds are required
For small power purposes and high speeds
For large power purposes
For small power purposes and low speeds

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Steam Boilers, Engines, Nozzles and Turbines
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine

Benson boiler
Locomotive boiler
Babcock and Wilcox boiler
Lancashire boiler

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

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

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