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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
At critical point, i.e. p=225.65 kg/cm², the latent enthalpy of vaporisation is

Zero
Minimum
Depends on temperature also
Maximum

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Steam Boilers, Engines, Nozzles and Turbines
The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

Induced draught
Natural draught
Forced draught
Balanced draught

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are

Internally as well as externally fired
Externally fired
Internally fired
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Gusset stays in a boiler are provided to

Avoid explosion in furnace
Prevent the bulging of flat surfaces
Support furnace freely from top
Prevent leakage of hot flue gases

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Steam Boilers, Engines, Nozzles and Turbines
A wet vapor can be completely specified by

Temperature only
Pressure only
Pressure and dryness fraction
Dryness fraction only

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

1.7 MN/m²
170 MN/m²
0.17 MN/m²
17 MN/m²

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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