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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Alkaline pyrogallate is used in Orsat's apparatus for absorption of

CO
CO₂
O₂
N₂

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Steam Boilers, Engines, Nozzles and Turbines
Willian's law states that the steam consumption per hour provided with a throttled governor is proportional to (where I.P. = Indicated power)

I.P.
(I.P.)²
1/(I.P)
1/(I.P)²

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Steam Boilers, Engines, Nozzles and Turbines
The factor of evaporation for all boilers is always

Equal to unity
Greater than unity
Less than unity
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is used where working pressure and power required are

High
None of these
Moderate
Low

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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

Remain unaffected
Worsen
May improve/worsen depending on size
Improve

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