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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

None of these
Divergent nozzle
Convergent-divergent nozzle
Convergent nozzle

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Steam Boilers, Engines, Nozzles and Turbines
Which type of boiler can meet rapid changes of load?

Horizontal fire tube type
Forced circulation type
Vertical fire tube type
Horizontal water tube type

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Steam Boilers, Engines, Nozzles and Turbines
Cochran boiler is a

Vertical water tube boiler
Horizontal fire tube boiler
Vertical fire tube boiler
Horizontal water tube boiler

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Steam Boilers, Engines, Nozzles and Turbines
The draught may be produced by a

All of these
Mechanical fan
A steam jet
Chimney

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Steam Boilers, Engines, Nozzles and Turbines
In order to reduce the rotor speed of an impulse turbine, the method employed is

Pressure compounding
Velocity compounding
Pressure-velocity compounding
All of these

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Steam Boilers, Engines, Nozzles and Turbines
The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

ηS = ηN / ηB
None of the listed here
ηS = ηB / ηN
ηS = ηB × ηN

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