
name:PT317Day14class roll no113topic name evaporators
Authored by Anusuya Nandi
Physics
University

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
A)Is economical in operation
B)Employs high velocity, high heat transfer rate and less heating surface requirement
C)Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle
D)both b and c
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
__________ liquor is best handled in a long tube vertical evaporator.
Foamy
Scaling
Viscous
Salting
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Long tube evaporators can be classied as rising or climbing lm.
True
False
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Long tube evaporators are usually ______ evaporators.
Natural convection
Forced convection
Nucleate boiling
Radiation heated
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the average tube length of long tube evaporators?
4-10ft
4-10m
1-2ft
More than 10m
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The heating medium in the Long tube evaporator is usually _______
Gas at temperature just above 130℃
Steam
Gas at temperature just below 100℃
Gas at very high temperatures
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
While using Long tube evaporators, the desired concentration is usually not achieved in single ow.
True
False
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