A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides __________________?
Correct answer: A. Higher economy
- A. Higher economy
- B. Lower capacity
- C. Both A. & B.
- D. Lower economy
Explanation
In backward feeding, cold feed enters the last effect and is progressively heated as it moves toward the hotter effects, making better use of the available temperature levels and generally improving steam economy. This arrangement is therefore preferred for cold feed.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Heat Transfer Operations questions
Choose the correct equation ?
Pick out the correct equation ?
Pick out the wrong statement pertaining to a shell and tube heat exchanger ?
For evaporation of viscous solution in a multiple effect evaporator, the preferred feeding scheme is _________________?
1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the liquid is 1500 W/m2.°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be__________________?
Heat waves_____________________?