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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Duplex feed pumps are used in small steam boilers. These operate on the principle of

Reciprocating pump
Axial flow pump
Gear pump
Centrifugal pump

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of a cylindrical shell of a Scotch marine boiler varies from

1.5 to 2 m
3.5 to 4.5 m
None of these
2.5 to 3.5 m

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of internal flue tubes in a Lancashire boiler compared to its shell is

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

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Steam Boilers, Engines, Nozzles and Turbines
Stage efficiency is also known as

Gross efficiency
None of these
Diagram efficiency
Nozzle efficiency

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

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

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Steam Boilers, Engines, Nozzles and Turbines
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

Velocity remains constant
Velocity increases
Velocity decreases
Pressure remains constant

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