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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.

Safety valve
Stop valve
Blow off cock
Fusible plug

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio (p₂/p₁) is given by

(p₂/p₁) = [2/(n + 1)] n/(n-1)
(p₂/p₁) = [(n + 1)/2] n - (1/n)
(p₂/p₁) = [(n - 1)/2] n + (1/n)
(p₂/p₁) = [2/(n - 1)] n/(n + 1)

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Steam Boilers, Engines, Nozzles and Turbines
In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

260 kW
282 kW
296 kW
302 kW

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Steam Boilers, Engines, Nozzles and Turbines
The condition of steam in boiler drum is always

Wet
Saturated
Dry
Supersaturated

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Vacuum for reciprocating steam engines compared to steam turbines is

Less
Equal
More
Could be more or less depending on the size of plant

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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