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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as

Blow off cock
Stop valve
Fusible plug
Superheater

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Steam Boilers, Engines, Nozzles and Turbines
The three "Ts" for good combustion are

Total air, time, and temperature
Temperature, time, and turbulence
Total air, true fuel, and turbulence
Thorough mixing, total air and temperature

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Steam Boilers, Engines, Nozzles and Turbines
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts. and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is

0.25
0.8
0.4
0.5

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Steam Boilers, Engines, Nozzles and Turbines
The function of a cross-head is to guide motion of the _________ and to prevent it from bending.

Piston rod
Valve rod
Eccentric rod
Connecting rod

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Steam Boilers, Engines, Nozzles and Turbines
Desecration of feed water is carried out because it reduces

Heat transfer coefficient
pH value of water
Corrosion caused by oxygen
Cavitation of boiler feed pumps

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Steam Boilers, Engines, Nozzles and Turbines
The performance of a boiler is measured by the

Steam produced in kg/h
Amount of water evaporated per hour
All of the listed here
Steam produced in kg/kg of fuel burnt

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