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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
One kg of steam sample contains 0.8 kg dry steam? Its dryness fraction is

1
0.8
0.6
0.2

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Steam Boilers, Engines, Nozzles and Turbines
The length of Cornish boiler is of the order of

35 m
79 m
57.5 m
24 m

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Steam Boilers, Engines, Nozzles and Turbines
The best suited coal for chain or traveling grate stoker boiler is

High sulphur coal
Coking coal
Non-coking or free burning coal
Pulverized coal

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Steam Boilers, Engines, Nozzles and Turbines
The maximum discharge of steam through a convergent-divergent nozzle depends upon

Final pressure of steam leaving the nozzle
Initial pressure and volume of steam
Both (A) and (B)
Area of nozzle at throat

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Steam Boilers, Engines, Nozzles and Turbines
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

Over-damping
Under-damping
None of these
Choked

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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.

270°
60°
180°
90°

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