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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p₂) will be

5.46 bar
3.3 bar
8.2 bar
9.9 bar

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is

More
Same
Less
Could be more or less depending on other factors

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Steam Boilers, Engines, Nozzles and Turbines
Alkaline pyrogallate is used in Orsat's apparatus for absorption of

CO
O₂
N₂
CO₂

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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.

60°
180°
270°
90°

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Steam Boilers, Engines, Nozzles and Turbines
A valve installed between the boiler and the feed pump is

Steam stop valve
None of these
Blow off cock
Feed check valve

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Steam Boilers, Engines, Nozzles and Turbines
Fire tube boilers are

None of these
Internally as well as externally fired
Internally fired
Externally fired

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