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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
When the nozzle operates with the maximum mass flow, the nozzle is said to be

Under-damping
Choked
Over-damping
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Sulphur in coal results in

Spontaneous combustion during coal storage
Facilitating ash precipitation
Corroding air heaters
All of these

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Steam Boilers, Engines, Nozzles and Turbines
A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly

6.65
2.86
1.05
10.05

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Steam Boilers, Engines, Nozzles and Turbines
The efficiency of steam turbines may be improved by

Regenerative feed heating
Binary vapor plant
Any one of these
Reheating of steam

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Steam Boilers, Engines, Nozzles and Turbines
The artificial draught is produced by

Both (A) and (B)
Centrifugal fan
Chimney
Steam jet

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Steam Boilers, Engines, Nozzles and Turbines
An economiser is installed in a boiler primarily to

All of the listed here
Superheat the steam
Increase steam pressure
Reduce fuel consumption

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