The actual temperature drop across the heating surface in an evaporator depends on the_________________?
Correct answer: D. All A., B. and C.
- A. Feed
- B. Depth of liquid over heating surface
- C. Pressure difference between steam chest and vapour space
- D. All A., B. and C.
Explanation
The effective temperature drop is influenced by the steam-to-vapour-space pressure difference, liquid depth and its boiling-point effect, and feed conditions. Therefore, all three listed factors can affect the actual drop.
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