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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Water at pressure of 4 kg/cm² and 160°C temperature when exposed to atmosphere will

Boil
Cool down
Remain as it was
Flash i.e. get converted into steam

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Steam Boilers, Engines, Nozzles and Turbines
When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by

(h - hf1)/2257
(h × hf1)/2257
(h + hf1)/2257
None of these

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Steam Boilers, Engines, Nozzles and Turbines
There is always some steam left in the clearance space from the previous stroke. This steam left in the clearance space is called

Cushion steam
Wet steam
Saturated steam
Superheated steam

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Steam Boilers, Engines, Nozzles and Turbines
The shell of the Cochran boiler is made hemispherical

None of these
To give maximum space and strength
To withstand the pressure of steam inside the boiler
Both (A) and (B)

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Steam Boilers, Engines, Nozzles and Turbines
Clearance ratio is the ratio of

Clearance volume to the volume at cut-off
Volume at cut-off to the swept volume
Clearance volume to the swept volume
Swept volume to the clearance volume

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of a thermal cycle increases by

Cooling of steam
Reheating of steam
Regeneration
Both (A) and (B)

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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