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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
On Millier chart, the constant pressure lines

Diverge from right to left
Are equally spaced throughout
Diverge from left to right
First rise up and then fall

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Steam Boilers, Engines, Nozzles and Turbines
When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as

Natural circulation boiler
Internally fired boiler
Forced circulation boiler
Externally fired boiler

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Steam Boilers, Engines, Nozzles and Turbines
The bituminous coal is no caking if its carbon content is

81-85%
85-90%
78-81%
90-95%

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

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

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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)

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

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Steam Boilers, Engines, Nozzles and Turbines
The feed check valve is used in order to

Allow high pressure feed water to flow to drum and not allow reverse flow to take place
Recirculate unwanted feed water
Check level of water in boiler drum
Regulate flow of boiler water

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