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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The crown of the fire box is made hemispherical in order to

Resist intense heat in fire box
Give maximum strength
Give maximum space
Withstand pressure inside boiler

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Steam Boilers, Engines, Nozzles and Turbines
The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

Remain dry saturated
Superheated
Dry
Wet

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following varieties of coals is mostly used in steam boilers?

None of the listed here
Peat
Non-coking bituminous coal
Brown coal

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Steam Boilers, Engines, Nozzles and Turbines
A stage, in reaction turbine, is represented by

Number of entries of steam
Each row of blades
Number of casing
Number of exits of steam

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Steam Boilers, Engines, Nozzles and Turbines
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.

90°
270°
180°
60°

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Steam Boilers, Engines, Nozzles and Turbines
The evaporation of 15.653 kg of water per hour from and at 100°C is called

Equivalent evaporation
Factor of evaporation
Evaporative capacity
One boiler h.p.

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