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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as

Blow off cock
Stop valve
Fusible plug
Superheater

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in a Locomotive boiler has __________ diameter.

7.45 mm
5.47 mm
4.75 mm
47.5 mm

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Steam Boilers, Engines, Nozzles and Turbines
The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet)

Vb = 0.5 V² cosα
Vb = 0.5 V cosα
Vb = V cos α
Vb = V² cos α

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Steam Boilers, Engines, Nozzles and Turbines
The working pressure range for a LaMont boiler is

0.5 to 10 MN/m²
2.5 to 15 MN/m²
3.5 to 20 MN/m²
1 to 15 MN/m²

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Steam Boilers, Engines, Nozzles and Turbines
The action of steam in a steam turbine is

Static and dynamic
Dynamic
Static
Neither static nor dynamic

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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
Lower/higher depending on steam flow
Same value
Higher value

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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