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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The basic purpose of drum in boiler is to

Serve as storage of feed water for water wall
Serve as storage of steam
Separate steam from water
Remove salts from water

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Steam Boilers, Engines, Nozzles and Turbines
The working pressure range for a LaMont boiler is

3.5 to 20 MN/m²
2.5 to 15 MN/m²
0.5 to 10 MN/m²
1 to 15 MN/m²

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Steam Boilers, Engines, Nozzles and Turbines
In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

Worsen
Remain unaffected
Improve
May improve/worsen depending on size

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

V = 2g H'
V = 2gH'
V = 2g/H'
V = H'/2g

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Steam Boilers, Engines, Nozzles and Turbines
With increase in load, convection superheater has

Rising characteristic
Flat characteristic
Linear characteristic
Drooping characteristic

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Steam Boilers, Engines, Nozzles and Turbines
If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

Separating calorimeter
Combined separating and throttling calorimeter
Bucket calorimeter
Throttling calorimeter

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