Question

The evaporator in which the material to be evaporated boils outside the horizontal tube and steam condenses inside the tubes is called ________

(a) Horizontal tube evaporator

(b) Vertical tube evaporator

(c) Vacuum pan evaporator

(d) Forced circulation evaporator

I had been asked this question during an online interview.

I'd like to ask this question from Evaporator topic in section Building Blocks of Dairy Processing of Dairy Engineering

Answer 1

Right option is (a) Horizontal tube evaporator

The best explanation: In Horizontal tube evaporator, the material to be evaporated boils outside the horizontal tube and steam condenses inside the tubes. These evaporators are not considered effective as the heat transfer is lower especially if the liquid is viscous.