_When the circulation of water, in a boiler, is by convection currents – McqOptions

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1.	_When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as$?
A.	Internally fired boiler
B.	Externally fired boiler
C.	Natural circulation boiler
D.	Forced circulation boiler
Answer» D. Forced circulation boiler

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