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Steam Boilers, Engines, Nozzles and Turbines

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

282 kW
260 kW
296 kW
302 kW

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Steam Boilers, Engines, Nozzles and Turbines
Green coal, in order to be burnt, must be

Heated to its ignition point
Burnt in excess air
Heated sufficiently
Burnt as powder

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for gases is

0.577
0.528
0.582
0.546

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Steam Boilers, Engines, Nozzles and Turbines
The radius of a dished head is taken approximately as

One
One fourth
Half
Two

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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
Wet
Dry

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Steam Boilers, Engines, Nozzles and Turbines
The pressure of reheat steam after passing through reheater compared to inlet condition is

Less
Equal
More
May be more or less depending on capacity of reheater

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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