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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
An air preheater is installed

Before the economiser
Before the superheater
Between the economiser and chimney
None of these

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Steam Boilers, Engines, Nozzles and Turbines
In reaction turbines, the axial thrust is due to

Change in axial velocity
None of these
Pressure drop across the rotor
Both (A) and (B)

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Steam Boilers, Engines, Nozzles and Turbines
Superheating of steam is done at

Constant volume
Constant pressure
Constant temperature
Constant entropy

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Steam Boilers, Engines, Nozzles and Turbines
In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is

0.06 bar
0.067 bar
0.007 bar
0.053 bar

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Steam Boilers, Engines, Nozzles and Turbines
In an impulse turbine, steam expands

Wholly in blades
None of these
Wholly in nozzle
Partly in the nozzle and partly in blades

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Steam Boilers, Engines, Nozzles and Turbines
The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called

None of these
Chimney draught
Forced steam jet draught
Induced steam jet draught

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