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Steam Boilers, Engines, Nozzles and Turbines

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

None of these
Over-damping
Choked
Under-damping

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Steam Boilers, Engines, Nozzles and Turbines
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

Equal to
More than
None of the listed here
Less than

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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.

180°
90°
270°
60°

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Steam Boilers, Engines, Nozzles and Turbines
The diameters of fire tubes and superheater tubes in locomotive boiler are

24.5 mm, 65 mm
65.5 mm, 210 mm
47.5 mm, 130 mm
32.5 mm, 180 mm

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Steam Boilers, Engines, Nozzles and Turbines
The number of drums in Benson steam generator is

Two
No drum
One
One steam drum and one water drum

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Steam Boilers, Engines, Nozzles and Turbines
The effect of super-saturation is that the

Mass of the steam discharged increases
Exit velocity of steam reduces
All of these
Entropy and specific volume of the steam increases

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