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_________ is used for cooling of products, mechanisms and factory machinery under control temperature.

a) Chiller
b) Ice
c) Alcohol
d) Ice or alcohol according to the product

Answer: a
Explanation: Chillers are used for cooling of products, mechanisms and factory machinery under control temperature. These follow absorption refrigerant cycle or vapor compressionfor cooling a fluid. The basic principle is that heat always flows from hot to cold.

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