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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The specific volume of steam with increase in pressure decreases

Inversely
Rapidly first and then slowly
Slowly first and then rapidly
Linearly

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Steam Boilers, Engines, Nozzles and Turbines
Relative percentage of heat absorbed through the heat transfer of(i) Furnace water wall(ii) Boiler tank(iii) Superheater(iv) Economizer(v) Air-heater of a typical boiler of 200 MW capacity would be of the order of

7 : 15 : 20 : 10 : 48
20 : 48 : 7 : 15 : 10
48 : 20 : 15 : 7 : 10
10 : 7 : 15 : 20 : 48

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Steam Boilers, Engines, Nozzles and Turbines
The friction present between the steam and the nozzle surfaces reduces the heat drop by

40 to 60%
25 to 40%
10 to 15%
15 to 25%

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Steam Boilers, Engines, Nozzles and Turbines
The actual vacuum in a condenser is equal to

Gauge pressure + atmospheric pressure
Barometric pressure + actual pressure
Gauge pressure - atmospheric pressure
Barometric pressure - actual pressure

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Steam Boilers, Engines, Nozzles and Turbines
On Mollier chart, flow through turbine is represented by

Curved line
Vertical straight line
Straight inclined line
Horizontal straight line

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Steam Boilers, Engines, Nozzles and Turbines
The mechanical draught _________ with the amount of smoke.

Increases
Decreases
Does not effect
None of these

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