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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Curtis turbine is a

Pressure-velocity compounded turbine
Velocity compounded turbine
Pressure compounded turbine
Simple reaction turbine

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Steam Boilers, Engines, Nozzles and Turbines
The diameters of fire tubes and superheater tubes in locomotive boiler are

65.5 mm, 210 mm
24.5 mm, 65 mm
47.5 mm, 130 mm
32.5 mm, 180 mm

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

Add make up water in the system
Pump water, similar to boiler feed pump
Inject chemical solution in feed pump
Create vacuum

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Steam Boilers, Engines, Nozzles and Turbines
The safety valve on boiler drum compared to safety valve on superheater is set at

Lower value
Higher value
Same value
Lower/higher depending on steam flow

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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

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

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Steam Boilers, Engines, Nozzles and Turbines
Latent heat of dry steam at atmospheric pressure is equal to

100 kcal/ kg
539 kcal/ kg
539 BTU/ lb
427 kcal/ kg

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