Heat Transfer Operations Mock Test 6

10%

Question 1 of 10

1. What is defined by the term Evaporator Capacity?

Kg of water evaporated in 1hr

Kg of water evaporated in one day

Kg of fluid supplied in one day

Kg of fluid supplied in 1hr

Question 1 of 10

Question 2 of 10

2. For Duhring’s plot to be valid and to see its applicability to an operation, we must check if the solution in feed follows __________

Gas Laws

Roults law

Avogadro’s Law

Henry’s Law

Question 2 of 10

Question 3 of 10

3. What do we mean by the term Evaporator Consumption?

Steam consumed in 1hr

Steam produced in 1hr

Feed supplied in 1day

Feed supplied in 1hr

Question 3 of 10

Question 4 of 10

4. If the concentration of the solution increases, the Lines shift __________

Downwards

To the right

To the left

Upwards

Question 4 of 10

Question 5 of 10

5. Find one among the following which does not measure evaporator performance.

Steam Consumption

Amount of feed supplied

Economy

Amount of Vapour Produced

Question 5 of 10

Question 6 of 10

6. Agitated film evaporator is also known as _______ film evaporator.

Wiped

Flushed

Flash

Swiped

Question 6 of 10

Question 7 of 10

7. In the given formula for overall heat transfer coefficient in Rising film evaporators, What is the term h_OD?
\(\frac{1}{U}=\frac{1}{ho}+\frac{1}{h_{OD}}+(\frac{Do}{Di})(\frac{1}{h_{ID}})+ (\frac{Do}{Di})(\frac{1}{hi})\)

Inside film heat transfer coefficient

Outside film heat transfer coefficient

Inside dirt coefficient

Outside dirt coefficient

Question 7 of 10

Question 8 of 10

8. Falling film evaporators are a subclass of long tube evaporators.

False

True

Question 8 of 10

Question 9 of 10

9. Why are food, pharmaceuticals and sensitive fluids used in climbing tube evaporators?

The pressure is very low

The fluid is not exposed to high temperature for a long period of time

Its heated by natural convection

There is very less temperature gradient

Question 9 of 10

Question 10 of 10

10. Which one of the following cannot be regarded as a demerit of falling film evaporator?

High headroom requirement

Corrosive fluids cannot be used

Large product holdup

Recirculation needed

Question 10 of 10