Which one of the following is not an assumption in multiple effect evaporator’s calculations?

There is no sub cooling of the condensate from different steam chests

Heat transfer surface does not undergo fouling

The entering steam is at their boiling point

Pressure is same in every effect

In a multiple effect evaporator with more than one effects, the size of each effect should __________

Should increase if pressure increases

What is the reason for using decreasing pressure on every subsequent effects in a multiple effect evaporator?

To decrease the vapour pressure

To be able to reuse the vapour from previous effect

To decrease the vapour pressure

Explore topic-wise MCQs in Heat Transfer.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.

1.	Which one of the following is not an assumption in multiple effect evaporator’s calculations?
A.	There is no sub cooling of the condensate from different steam chests
B.	Heat transfer surface does not undergo fouling
C.	The entering steam is at their boiling point
D.	Pressure is same in every effect
Answer» E.

Discussion

2.	The vapours entering into the steam chest of respective effects of a multiple effect evaporator are at their saturation temperature.
A.	True
B.	False
Answer» B. False

Discussion

3.	The multiple effect evaporators usually use __________ system of evaporation.
A.	Flash
B.	Natural convection
C.	Forced convection
D.	Bubble boiling
Answer» B. Natural convection

Discussion

4.	Which one of the following evaporator setup is the most versatile of all evaporators?
A.	Falling film long tube
B.	Agitated vessel
C.	Rising film
D.	Plate type evaporator
Answer» C. Rising film

Discussion

5.	Which one of the following evaporator is usually preferred for operation in a multiple effect for less viscous liquids?
A.	Falling film long tube
B.	Agitated vessel
C.	Rising film
D.	Plate type evaporator
Answer» B. Agitated vessel

Discussion

6.	In a multiple effect evaporator with more than one effects, the size of each effect should __________
A.	Decrease if pressure decreases
B.	Increase if pressure decreases
C.	Remain same
D.	Should increase if pressure increases
Answer» D. Should increase if pressure increases

Discussion

7.	What is the number of effects used in the following setup?.
A.	Triple effect evaporator
B.	Single effect evaporator
C.	Quadruple effect evaporator
D.	Double effect evaporator
Answer» B. Single effect evaporator

Discussion

8.	What is the reason for using decreasing pressure on every subsequent effects in a multiple effect evaporator?
A.	To be able to reuse the vapour from previous effect
B.	To decrease the vapour pressure
C.	To increase the boiling point
D.	To decrease the boiling point
Answer» B. To decrease the vapour pressure

Discussion

9.	In a multiple effect evaporator, the pressure __________ as we move to subsequent effects.
A.	Decreases
B.	Increases
C.	Remains same
D.	Doubles
Answer» B. Increases

Discussion

Explore topic-wise MCQs in Heat Transfer.

Which one of the following is not an assumption in multiple effect evaporator’s calculations?

The vapours entering into the steam chest of respective effects of a multiple effect evaporator are at their saturation temperature.

The multiple effect evaporators usually use __________ system of evaporation.

Which one of the following evaporator setup is the most versatile of all evaporators?

Which one of the following evaporator is usually preferred for operation in a multiple effect for less viscous liquids?

In a multiple effect evaporator with more than one effects, the size of each effect should __________

What is the number of effects used in the following setup?.

What is the reason for using decreasing pressure on every subsequent effects in a multiple effect evaporator?

In a multiple effect evaporator, the pressure __________ as we move to subsequent effects.