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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

None of these
Convergent nozzle
Convergent-divergent nozzle
Divergent nozzle

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Steam Boilers, Engines, Nozzles and Turbines
Which device is used in thermal power plants to reduce level of pollution?

Induced draft fan
Smoke meter
Precipitator
Chimney

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially wet steam is

0.582
0.546
0.577
0.601

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Steam Boilers, Engines, Nozzles and Turbines
A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as

Steam boiler
Steam condenser
Steam preheater
Economiser

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Steam Boilers, Engines, Nozzles and Turbines
The basic job of feed water treatment in boilers is to overcome the problem of

Carryover
All of these
Corrosion
Scale

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

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