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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The high steam and low water safety valve is not used in

Lancashire boiler
Locomotive boiler
Cornish boiler
Cochran boiler

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Steam Boilers, Engines, Nozzles and Turbines
With increase in load, convection superheater has

Rising characteristic
Drooping characteristic
Flat characteristic
Linear characteristic

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Steam Boilers, Engines, Nozzles and Turbines
The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)

88.25H/T1
T1 /88.25H
176.5H/T1
T1 /176.5H

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

The steam consumption is less
The efficiency of steam turbine is higher
All of these
A steam turbine develops higher speeds

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Steam Boilers, Engines, Nozzles and Turbines
Multi-stage steam turbines are of the

Pressure compounded type
All of these
Velocity compounded type
Reaction type

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Steam Boilers, Engines, Nozzles and Turbines
The relative heat absorption for successively added equal areas of boiler convection heating surfaces

Increases
Decreases
First increases and then decreases
Remain unaffected

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