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Steam Boilers, Engines, Nozzles and Turbines

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

Nozzle efficiency
Mechanical efficiency
Gross or stage efficiency
Blading efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The safety valve at superheater as compared to drum safety valve setting is set at

Higher value
Same value
Lower value
Any value

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the isentropic heat drop to the heat supplied, is called

Stage efficiency
Reheat factor
Rankine efficiency
Internal efficiency

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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

None of these
Over-damping
Choked
Under-damping

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Steam Boilers, Engines, Nozzles and Turbines
Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value

1 – moisture content
(1 + moisture content)
1 + moisture content
(1- moisture content)

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Steam Boilers, Engines, Nozzles and Turbines
The steam leaves the nozzle at a

Low pressure and a high velocity
High pressure and a low velocity
Low pressure and a low velocity
High pressure and a high velocity

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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