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1. In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
(A): compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller.
(B): condenser can act as a storage unit for condensed steam.
(C): maintaining vacuum on tube side is more difficult than that on the shell side.
(D): water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam.
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