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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of fire tubes in Cochran boiler is of the order of

6 cm
8 cm
2 cm
12 cm

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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

Water space also
Superheater
Chimney
Steam space

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Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a reaction turbine is

2 cos²α/(1 + cos²α)
2 sin²α/(1 + sin²α)
(1 + sin²α)/2 sin²α
(1 + cos²α)/2 cos²α

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Steam Boilers, Engines, Nozzles and Turbines
In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as

100°C and 1.1 bar pressure
50°C and normal atmospheric pressure
50°C and 1.1 bar pressure
100°C and normal atmospheric pressure

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the workdone on the blades to the energy supplied to the blades, is called

Mechanical efficiency
Blading efficiency
Gross or stage efficiency
Nozzle efficiency

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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