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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The function of injector used in small steam plants is to

Pump feed water
Dose chemicals in feed water
Create vacuum in furnace
Create vacuum at turbine exhaust

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Steam Boilers, Engines, Nozzles and Turbines
The numbers of fire tubes in a Cochran boiler are

165
75
115
225

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Steam Boilers, Engines, Nozzles and Turbines
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Twice
Three times
Equal to
Four times

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

Flat characteristic
Drooping characteristic
Linear characteristic
Rising characteristic

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of internal flue tubes of a Lancashire boiler is about ___ that of its shell.

One-third
One-fourth
One-half
Two-fifth

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Steam Boilers, Engines, Nozzles and Turbines
The effect of bleeding is that

Boiler is supplied with hot water
It decreases the power developed by the turbine
It increases the thermodynamic efficiency of the turbine
All of these

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