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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

30 to 40%
15 to 20%
10 to 15%
20 to 30%

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Steam Boilers, Engines, Nozzles and Turbines
In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of

30 atmospheres
20 atmospheres
40 atmospheres
10 atmospheres

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Steam Boilers, Engines, Nozzles and Turbines
At which pressure the properties of water and steam become identical

1 kg/cm²
100 kg/cm²
0.1 kg/cm²
225.6 kg/cm²

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Steam Boilers, Engines, Nozzles and Turbines
The discharge is __________ at critical pressure.

Zero
Maximum
Minimum
None of these

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Steam Boilers, Engines, Nozzles and Turbines
In a glass tube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to

Superheater
Water space also
Chimney
Steam space

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Steam Boilers, Engines, Nozzles and Turbines
A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

79 m/s
450 m/s
188 m/s
900 m/s

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