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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The average value of diagram factor lies between

0.2 to 0.5
0.5 to 0.65
0.8 to 1.2
0.65 to 0.9

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Steam Boilers, Engines, Nozzles and Turbines
Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

High calorific value coal being burnt
Fouling of heat transfer surfaces
Higher effectiveness of boiler
Raising of steam temperature

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of internal flue tubes of a Lancashire boiler is about ___ that of its shell.

One-half
One-third
One-fourth
Two-fifth

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Steam Boilers, Engines, Nozzles and Turbines
The fittings mounted on the boiler for its proper and safe functioning is a

Pressure gauge
All of these
Water level indicator
Safety valve

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Steam Boilers, Engines, Nozzles and Turbines
The variation of steam pressure in the nozzle depends upon

Velocity of steam
Specific volume of steam
All of these
Dryness fraction of steam

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Steam Boilers, Engines, Nozzles and Turbines
The rate of discharge through the nozzle ___ when the exit pressure is gradually reduced.

Increases
None of the listed here
Decreases
Remains same

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