If we have a feed flow rate of 30kg/hr at 25 then what should be the heating steam rate if we wish to evaporate 4kg of water from the dilute solution in an hour?Latent heat of vaporization of water = 2,260 kJ/kg

nSpecific heat capacity = 6 KJ/Kg K

If evaporation takes place from a feed of 50wt% solid at 25 in an hour if there is constant supply of 30kg steam per 100kg feed in that hour, then what is the final concentration?Latent heat of vaporization of water = 2,260 kJ/kg

nSpecific heat capacity = 6 KJ/Kg K

If we have a steam flow rate of 10kg/hr then what should be the inlet feed rate if we wish to evaporate 4kg of water from the dilute solution in an hour?Latent heat of vaporization of water = 2,260 kJ/kg

nSpecific heat capacity = 6 KJ/Kg K

How much evaporation can take place from a feed of 30kg at 25 C in an hour if there is constant supply of 10kg steam in that hour?Latent heat of vaporization of water = 2,260 kJ/kg

nSpecific heat capacity = 6 KJ/Kg K

What is mass of Steam that needs to be supplied in order to heat the tubes and evaporate 10kg of water from a feed of 50kg at a temperature of 25 to a final temperature of 100 ?Latent heat of vaporization of water = 2,260 kJ/kg

nSpecific heat capacity = 6 KJ/Kg K

What is amount of heat that needs to be supplied in order to evaporate 10kg of water from a feed of 50kg at a temperature of 25 to a final temperature of 100 ?Latent heat of vaporization of water = 2,260 kJ/kg

nSpecific heat capacity = 6 KJ/Kg K

Why do we use Single effect evaporators when we already have multiple effect one?

To have liberty to use fouling liquids

To have higher efficiency with cheap material

12 + Mcqs in Evaporators Single Effect Operations in Heat Transfer Operations Page 1 McqOptions

1.	If we have a feed flow rate of 30kg/hr at 25 then what should be the heating steam rate if we wish to evaporate 4kg of water from the dilute solution in an hour? Latent heat of vaporization of water = 2,260 kJ/kg
A.	nSpecific heat capacity = 6 KJ/Kg K
B.	10kg
C.	12kg
D.	11kg
E.	13kg
Answer» B. 10kg

Discussion

2.	Which one of the following would not benefit the evaporator if employed?
A.	Pressure reduced
B.	Pressure increased
C.	Surface area increased
D.	Steam supply increased
Answer» C. Surface area increased

Discussion

3.	If evaporation takes place from a feed of 50wt% solid at 25 in an hour if there is constant supply of 30kg steam per 100kg feed in that hour, then what is the final concentration? Latent heat of vaporization of water = 2,260 kJ/kg
A.	nSpecific heat capacity = 6 KJ/Kg K
B.	57
C.	56
D.	55
E.	54
Answer» C. 56

Discussion

4.	Increasing the pressure of the setup will result in larger evaporation rate.
A.	True
B.	False
Answer» C.

Discussion

5.	If we have a steam flow rate of 10kg/hr then what should be the inlet feed rate if we wish to evaporate 4kg of water from the dilute solution in an hour? Latent heat of vaporization of water = 2,260 kJ/kg
A.	nSpecific heat capacity = 6 KJ/Kg K
B.	30kg
C.	32kg
D.	31kg
E.	33kg
Answer» B. 30kg

Discussion

6.	How much evaporation can take place from a feed of 30kg at 25 C in an hour if there is constant supply of 10kg steam in that hour? Latent heat of vaporization of water = 2,260 kJ/kg
A.	nSpecific heat capacity = 6 KJ/Kg K
B.	2kg
C.	3kg
D.	4kg
E.	5kg
Answer» D. 4kg

Discussion

7.	What is mass of Steam that needs to be supplied in order to heat the tubes and evaporate 10kg of water from a feed of 50kg at a temperature of 25 to a final temperature of 100 ? Latent heat of vaporization of water = 2,260 kJ/kg
A.	nSpecific heat capacity = 6 KJ/Kg K
B.	21kg
C.	22kg
D.	20kg
E.	19kg
Answer» D. 20kg

Discussion

8.	What is amount of heat that needs to be supplied in order to evaporate 10kg of water from a feed of 50kg at a temperature of 25 to a final temperature of 100 ? Latent heat of vaporization of water = 2,260 kJ/kg
A.	nSpecific heat capacity = 6 KJ/Kg K
B.	52600 KJ
C.	56200 KJ
D.	2272.6 MJ
E.	45100 KJ
Answer» E. 45100 KJ

Discussion

9.	Which one of the following is the most common mode of operation of single effect evaporators?
A.	Batch
B.	Semi-Batch
C.	Continuous batch
D.	Continuous
Answer» D. Continuous

Discussion

10.	Multiple effect evaporators can be constructed with cheap materials than single effect evaporators.
A.	True
B.	False
Answer» B. False

Discussion

11.	Which one of the following do we prefer to use for single effect over multiple effect evaporator?
A.	Low pressure operations
B.	High pressure operations
C.	Corrosive materials use
D.	High temperature operations
Answer» D. High temperature operations

Discussion

12.	Why do we use Single effect evaporators when we already have multiple effect one?
A.	To have liberty to use fouling liquids
B.	To create low pressure
C.	To have large temperature
D.	To have higher efficiency with cheap material
Answer» B. To create low pressure

Discussion

Explore topic-wise MCQs in Heat Transfer Operations.

If we have a feed flow rate of 30kg/hr at 25 then what should be the heating steam rate if we wish to evaporate 4kg of water from the dilute solution in an hour?Latent heat of vaporization of water = 2,260 kJ/kg

Which one of the following would not benefit the evaporator if employed?

If evaporation takes place from a feed of 50wt% solid at 25 in an hour if there is constant supply of 30kg steam per 100kg feed in that hour, then what is the final concentration?Latent heat of vaporization of water = 2,260 kJ/kg

Increasing the pressure of the setup will result in larger evaporation rate.

If we have a steam flow rate of 10kg/hr then what should be the inlet feed rate if we wish to evaporate 4kg of water from the dilute solution in an hour?Latent heat of vaporization of water = 2,260 kJ/kg

How much evaporation can take place from a feed of 30kg at 25 C in an hour if there is constant supply of 10kg steam in that hour?Latent heat of vaporization of water = 2,260 kJ/kg

What is mass of Steam that needs to be supplied in order to heat the tubes and evaporate 10kg of water from a feed of 50kg at a temperature of 25 to a final temperature of 100 ?Latent heat of vaporization of water = 2,260 kJ/kg

What is amount of heat that needs to be supplied in order to evaporate 10kg of water from a feed of 50kg at a temperature of 25 to a final temperature of 100 ?Latent heat of vaporization of water = 2,260 kJ/kg

Which one of the following is the most common mode of operation of single effect evaporators?

Multiple effect evaporators can be constructed with cheap materials than single effect evaporators.

Which one of the following do we prefer to use for single effect over multiple effect evaporator?

Why do we use Single effect evaporators when we already have multiple effect one?

If we have a feed flow rate of 30kg/hr at 25 then what should be the heating steam rate if we wish to evaporate 4kg of water from the dilute solution in an hour?
Latent heat of vaporization of water = 2,260 kJ/kg

If evaporation takes place from a feed of 50wt% solid at 25 in an hour if there is constant supply of 30kg steam per 100kg feed in that hour, then what is the final concentration?
Latent heat of vaporization of water = 2,260 kJ/kg

If we have a steam flow rate of 10kg/hr then what should be the inlet feed rate if we wish to evaporate 4kg of water from the dilute solution in an hour?
Latent heat of vaporization of water = 2,260 kJ/kg

How much evaporation can take place from a feed of 30kg at 25 C in an hour if there is constant supply of 10kg steam in that hour?
Latent heat of vaporization of water = 2,260 kJ/kg

What is mass of Steam that needs to be supplied in order to heat the tubes and evaporate 10kg of water from a feed of 50kg at a temperature of 25 to a final temperature of 100 ?
Latent heat of vaporization of water = 2,260 kJ/kg

What is amount of heat that needs to be supplied in order to evaporate 10kg of water from a feed of 50kg at a temperature of 25 to a final temperature of 100 ?
Latent heat of vaporization of water = 2,260 kJ/kg