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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Stage efficiency is also known as

Diagram efficiency
None of these
Gross efficiency
Nozzle efficiency

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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
In a reaction turbine, when steam flows through the moving blades,

Pressure increases while velocity decreases
Pressure and velocity both decreases
Pressure decreases while velocity increases
Pressure and velocity both increases

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Steam Boilers, Engines, Nozzles and Turbines
A stage, in reaction turbine, is represented by

Number of entries of steam
Number of exits of steam
Number of casing
Each row of blades

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Steam Boilers, Engines, Nozzles and Turbines
Incomplete combustion can be best judged by

Smoky chimney exit
Measuring carbon monoxide in flue gases
Excess air in flue gases
Measuring temperature of flue gases at exit of furnace

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Steam Boilers, Engines, Nozzles and Turbines
The shell of the Cochran boiler is made hemispherical

Both (A) and (B)
None of these
To withstand the pressure of steam inside the boiler
To give maximum space and strength

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