What is the geometric mean of two heat transfer areas A1 and A2 ?

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Reason for operating an evaporator in multiple effects is to secure ___________________?

A. Increased steam economy B. Decreased steam consumption C. Both A. and B. D. Increased capacity...

In a single evaporator system, the steam economy ________________ by creating vacuum in the evaporator?

A. Increases B. Decreases C. Remain constant D. May increase or decrease, depends on the vacuum...

In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?

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Radiator of an automobile engine is a ______________ type of heat exchanger?

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