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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The fusible plug in small boilers is located

In the fire tubes
In the drum
Above steam dome
Over the combustion chamber

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Steam Boilers, Engines, Nozzles and Turbines
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.

Safety valve
Blow off cock
Fusible plug
Stop valve

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Steam Boilers, Engines, Nozzles and Turbines
On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by

Horizontal straight line
Straight inclined line
Vertical straight line
Curved line

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)

T1 /176.5H
T1 /88.25H
88.25H/T1
176.5H/T1

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Steam Boilers, Engines, Nozzles and Turbines
Fire tube boilers are limited to a maximum design working pressure of

1 kg/cm
100 kg/cm²
17 kg/cm²
6 kg/cm

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