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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The numbers of fire tubes in a Cochran boiler are

225
115
75
165

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure gives the velocity of steam at the throat

Less than the velocity of sound
None of these
More than the velocity of sound
Equal to the velocity of sound

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Steam Boilers, Engines, Nozzles and Turbines
Cut-off governing as compared to throttle governing is

Less efficient and more economical
More efficient and less economical
More efficient and more economical
Less efficient and less economical

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Steam Boilers, Engines, Nozzles and Turbines
In a reaction turbine when the degree of reaction is zero, then there is

Maximum heat drop in fixed blades
Maximum heat drop in moving blades
No heat drop in fixed blades
No heat drop in moving blades

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Steam Boilers, Engines, Nozzles and Turbines
The turbine blades are

Circular
Curved
None of these
Straight

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Steam Boilers, Engines, Nozzles and Turbines
The effect of bleeding is that

It decreases the power developed by the turbine
All of these
Boiler is supplied with hot water
It increases the thermodynamic efficiency of the turbine

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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