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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Fusible plug for boilers is made of fusible metal containing tin, lead, and

Aluminium
Bismuth
Nickel
Copper

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Steam Boilers, Engines, Nozzles and Turbines
Water boils when its vapor pressure

Equals to atmospheric pressure
Equals 760 mm of mercury
Equals the pressure of water in the container
Equals that of the surroundings

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Steam Boilers, Engines, Nozzles and Turbines
The expansion of steam in a nozzle follows

Rankine cycle
Joule cycle
Stirling cycle
Carnot cycle

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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)

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

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

Blow off cock
None of these
Superheater
Stop valve

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Steam Boilers, Engines, Nozzles and Turbines
The value of the reheat factor varies from

1.6 to 2
1.2 to 1.6
1.02 to 1.06
1.08 to 1.10

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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