Heat Transfer Operations MCQ (Multiple Choice Questions)

Here are 1000 MCQs on Heat Transfer Operations (Chapterwise).

1. Which of the following is not a classification based on Construction of the heat Exchanger?
a) Multipass
b) Regenerative
c) Plate Type
d) Tubular
View Answer

Answer: a
Explanation: Multipass is a classification based on flow type and not on construction. If we classify a Heat exchanger based on flow type, it would be Multipass and Single-pass.

2. Packed Beds are one of the most common heat exchangers because of its very ______
a) Low heat transfer rate
b) High bed side heat transfer coefficient
c) High conductivity
d) High wall side heat transfer coefficient
View Answer

Answer: b
Explanation: Packed beds have high bed side heat transfer coefficient which facilitates profitable heat transfer, hence this is the reason why they are so commonly used.

3. What is Critical radius of insulation?
a) The minimum radius at which maximum heat transfer rate is observed
b) The maximum radius that can allow heat transfer
c) The maximum heat transfer coefficient at a maximum possible radius
d) The radius at which maximum heat transfer rate is observed
View Answer

Answer: d
Explanation: The critical thickness of insulation is that radius (neither maximum nor minimum) of the insulating wall with conductive heat transfer coefficient as K and the surrounding fluid convective heat transfer coefficient as H, that gives maximum heat transfer rate Q.

4. In a ___________ heat exchanger, both fluids flow alternatively through the same flow passages, and hence heat transfer is intermittent.
a) Cross Flow Type
b) Fluidised Bed
c) Shell and Tube
d) Storage Type
View Answer

Answer: d
Explanation: In a Storage Type Heat Exchanger, the heat energy from the hot fluid is first stored in the matrix/wall of the heat exchanger. Wherein, cooling of the hot fluid takes place. As the cold fluid passes through this same matrix later, the stored heat energy in the matrix is transferred to the cold fluid. This intermittent flow pattern of hot fluid and cold fluid is an exclusive property of Storage Type HE.

5. When gas is used as a fluid in a double pipe heat exchanger, which one of the following is not true?
a) Fins increase necessary heat transfer area
b) The gas side heat transfer coefficient is the highest
c) Extended fins are used on the gas side to increase the Heat Transfer coefficient
d) The gas side has a low heat transfer coefficient
View Answer

Answer: b
Explanation: Fins are generally used to increase the Heat transfer Area when the heat transfer coefficient on that fluid side is comparatively low. Hence as ga

advertisement
advertisement

6. Which of the following is not a characteristic of a Direct-Contact Exchanger?
a) The Exchanger Construction is relatively not expensive
b) The fouling problem does not generally exist, due to the absence of a separating wall (heat transfer surface
c) Only heat Transfer occurs without any Mass -Transfer
d) Very high heat transfer rates are achievable
View AnswerAnswer: c
Explanation: One of the important applications of a direct contact exchanger is mass transfer accompanied by heat transfer, such as in evaporative cooling and rectification.

7. Given the convective heat transfer Coefficient of the inner surface to be 15W/m2K, OD = 30mm and ID = 25mm. Find the outer surface heat transfer coefficient.
a) 12.5 W/m2K
b) 15 W/m2K
c) 13.5 W/m2K
d) 12 W/m2K
View Answer

Answer: c
Explanation: The formula for heat transfer coefficients in a thick Pipe is,
hinner ×ID = houter × OD
Hence, houter = 15×25/30 = 12.5W/m2K.

8. To calculate the efficiency of a double pipe heat exchanger, the formula is
€ = \(\frac{X}{Maximum \, possible \, rate \, of \, Heat \, Transfer}\), where X stands for _________
a) Minimum rate of heat transfer
b) Experimental rate of heat transfer
c) Clean tube rate of heat transfer
d) Actual rate of heat transfer
View Answer

Answer: d
Explanation: The efficiency of a double pipe heat exchanger which is calculated by NTU or number of transfer units is given by € = \(\frac{Actual \,Heat\, transfer\, rate}{Maximum \, possible \, rate \, of \,Heat\, Transfer}\). Here x is Actual rate of heat transfer.

9. Why do we use counter-flow operation on gasketed type Heat Exchanger?
a) It reduces corrosion
b) Applied pressure difference required is low
c) It provides better ease of operation
d) A larger and uniform temperature difference is achieved
View Answer

Answer: d
Explanation: If we use counter-flow operation with a gasketed flow Plate-type Heat Exchanger, we obtain a larger LMTD (log mean temperature difference) which ensures more temperature gradient for higher heat transfer which is thermodynamically superior.

10. Which of the following is not a property of Plate type heat exchangers?
a) Even though the heat exchanger has low hydraulic diameter, it can be readily and easily cleaned
b) The net weight required is always less than its equivalent Shell and tube type heat exchanger
c) It provides a very large surface area for heat transfer
d) Leakage is never a concern in these heat exchangers
View Answer

Answer: d
Explanation: One of the main concerns of plate type heat exchangers is that it is very difficult to monitor leakages due to this large number of separable parts, even pinhole leakages can be a concern for highly reactive component’s use.

11. Which of the following is a correct statement about Plate -Fin heat exchanger?
a) It can be regarded as a Compact Heat Exchanger as it has a high heat transfer surface to volume ratio
b) The cost of plate-fin HE are relatively less compared to other conventional HE available in market
c) Even though it has fins, the plates can be opened and easily cleaned
d) Fins are irrelevant as it already provides a very large surface area
View Answer

Answer: a
Explanation: Plate fin HE provides a very large heat transfer Surface because of which it is often regarded as a compact HE. The addition of fine and its delicate design makes cleaning very difficult/impossible, so foul liquids are always avoided. This complicated design makes it relatively costlier than other equipments.

12. How is a Plate-type HE better than a Shell and tube HE, one of the following is not correct.
a) Thermal stress is higher in Plate type HE
b) Plate type heat exchangers have much higher heat transfer area than Shell and tube ones
c) Entry impingement problem of shell and tube is absent in Plate type HE
d) Vibrations due to flow and noise are comparatively absent in Plate type HE
View Answer

Answer: a
Explanation: All the statements are correct except that the thermal stress in higher in Plate type, which in reality is higher in shell and tube owing to its lesser surface area compared to plat type HE.

13. What limitations does Gaskets pose on Gasketed type HE?
a) It leads to leakage and does not provide proper separation
b) Reduces necessary heat transfer area causing decreased Heat coefficients
c) One directional flow is the only possibility
d) Limits its use only to non-corrosive fluids, as the gaskets get corroded
View Answer

Answer: d
Explanation: Gaskets of gasketed type HE are usually made of rubbers hence they are prone to corrosion when highly toxic fluids are used. They also limit high temperature and pressure applications as these rubbers can then rupture and cause mixing.

14. Which is the major mean of heat transfer in a Double Pipe heat exchanger?
a) Combined Convection and Conduction
b) Radiation
c) Convection
d) Conduction
View Answer

Answer: a
Explanation: In a double pipe HE, the fluid is in a constant uniform motion inside the pipes, it is the phenomena of forced convection that removes the fluid from the wall by dynamic mixing which increases the overall bulk temperature of the fluid. The separating wall is the heat transfer medium that carries heat from the hot fluid to the cold fluid through conduction.
advertisement

15. When we calculate the overall heat transfer coefficient U= \(\frac{X×ho}{X+ho}\), what is the value X?
a) hoi, heat transfer coefficient for annulus for inner side
b) hi, heat transfer coefficient for inner tube for inner side
c) hio, heat transfer coefficient for inner tube for outer side
d) ho, heat transfer coefficient for annulus side
View Answer

Answer: c
Explanation: When we are required to calculate the overall heat transfer coefficient U, we calculate it for the direction of interaction of the fluid’s heat energy, hence we calculate it with hio and ho, and not with hi which is tube’s inner side heat transfer coefficient.

16. How many times do we have to calculate for Nusselt number in a Double Pipe Heat Exchanger?
a) 6
b) 2
c) 4
d) 9
View Answer

Answer: b
Explanation: For a double pipe HE, we have to calculate Nusselt number twice, once for the inner pipe to calculate Convective Heat Transfer Coefficient for the inner pipe. Similarly, the second time for the annulus side.

17. When a fluid is used in a Shell and Tube heat exchanger, which one of the following is not true?
a) Fins increase necessary heat transfer area
b) If the fluid is gas then the gas side heat transfer coefficient is the lowest
c) Extended fins are used on the shell side to increase the Heat Transfer coefficient
d) Baffles are provided only to work as fins
View Answer

Answer: d
Explanation: Fins are generally used to increase the Heat transfer Area when the heat transfer coefficient on that fluid side is comparatively low. Hence as gases usually have lower heat transfer coefficients, fins are kept on this side. Also baffles are provided to give support to the tubes and increase the turbulence of the fluid in shell side.

18. Fins primarily increase the ______
a) Heat transfer rate
b) Turbulence
c) Heat transfer coefficient
d) Heat transfer area
View Answer

Answer: d
Explanation: Fins are primarily used to increase the heat transfer area, the rest of the factors given are consequences of this change.

19. Which of the following are not affected by adding Fins?
a) Turbulence
b) Heat transfer coefficient
c) Net Heat Transfer
d) Heat transfer rate
View Answer

Answer: c
Explanation: The net heat transfer in a particular operation should remain the same, fins are used to decrease the area and time for that process.
advertisement

20. Fouling factors increase the overall heat transfer conductance and hence decrease the overall heat transfer coefficient.
a) False
b) True
View Answer

Answer: a
Explanation: Fouling factors or dirt factors increase the overall heat transfer resistance and not the conductance which then decreases the overall heat transfer coefficient.

21. Which of the following statements are not true about fouling in a Heat Exchanger?
a) Pressure drop decreases
b) Efficiency decreases
c) It decreases the heat transfer coefficient in both sides
d) Temperature of the hot fluid remains hot and the cold fluid remains cold
View Answer

Answer: a
Explanation: When a heat exchanger faces fouling, its heat transfer coefficient decreases, pressure drop increases due to scaling, efficiency decreases and net heat transferred too decreases.

22. If we know the output and input temperatures of the heat exchanging fluids, then which one of the following calculation is not required to determine the number of bends in tube for the equipment?
a) Total heat transfer area required
b) Pipe length
c) Overall heat transfer coefficients
d) Pressure drop in the equipment
View Answer

Answer: d
Explanation: The pressure drop is calculated only to determine whether the equipment would work for a given flow rate and not the temperature requirements.

23. Which one of these is not true when the steady state is reached by the heat exchanging fluids in a double pipe HE?
a) Rate of heat transfer becomes constant
b) When their temperatures become stable
c) Wall temperature becomes constant
d) When the two liquids have same temperature
View Answer

Answer: d
Explanation: When the steady state is reached by the fluids in the HE, their temperatures become stable but not necessarily equal, as the heat transfer rate becomes constant, heat is still entering the tubes.

24. If the Heat Transfer area for a Shell and tube heat exchanger is 15100mm2, and the radius of the tubes is 30mm, then what is the number of hairpins required if its single pass length is 4cm?
a) 8
b) 2
c) 6
d) 5
View Answer

Answer: b
Explanation: Given the area is 15100mm2, we have the heat transfer area in terms of the tube diameter as A = πDL = 15100mm2 or L = 15100/3.14×30 = 160 mm = 16cm. As the length of a single pass hairpin is 4cm, its length is 8cm, hence we require n = 16/8 = 2hairpins.

25. If UD = Overall Dirt Heat Transfer coefficient and Uc = Overall Clean Heat Transfer coefficient, then which of the following relation is correct?
a) UD < Uc
b) UD >> Uc
c) UD = Uc
d) UD > Uc
View Answer

Answer: a
Explanation: In a shell and tube HE, fouling decreases the heat transfer rate hence the heat transfer coefficient decreases, thus the expression UD < Uc is correct.

26. To which side given below should we add fins?
a) Liquid side
b) Gas Side
c) Any side possible
d) Solid side
View Answer

Answer: b
Explanation: We add fins to that side which has low heat transfer coefficient so as to increase area at that side to facilitate heat transfer. Hence adding it to gas side is beat suited as gases have low heat transfer coefficient.

27. The Heat Transfer Coefficient remains constant throughout the surface of the fin.
a) False
b) True
View Answer

Answer: b
Explanation: The first and the prime assumption we make while deriving equations for Fins is that we assume the heat flow to be in steady state. For the heat flow to be in steady state, the heat transfer coefficient should stay constant. If it changes with time, then the heat transfer rate will also be affected by this change.

28. By increasing the fin density, the heat transfer coefficient associated with fins__________
a) Increases
b) Decreases
c) Increases tenfold
d) Remains the same
View Answer

Answer: b
Explanation: There is a limit to which we can apply fins to a surface, if the fin density crosses this threshold value, the heat transfer coefficients decreases as the liquid fails to make proper contact with the provided surface.

29. Adding fins inside the tube, that is for the tube side usually ________ the heat transfer coefficient.
a) Decreases
b) Tenfold
c) Does not change
d) Increases
View Answer

Answer: a
Explanation: Usually the tube side contains the cooling liquid and the heat transfer coefficient is already high there, hence adding extra heat transfer area will not be of any help rather would decrease flow rate and eventually decrease the heat transfer coefficient.

30. Heat transfer in Agitated Vessels can be carried out by two methods they are ____________
a) Semi coils and Internal coils
b) Jacketed and Plates
c) Plates and Coils
d) Jacketed and Internal coils
View Answer

Answer: d
Explanation: Heat Transfer in Agitated vessels is carried out by two methods either by external jackets or internal coils. Here jackets usually have lower heat transfer coefficient.

31. The heat transfer coefficient ________ with increasing flow rate.
a) Decreases
b) Remains the same
c) Increases
d) Drops drastically
View Answer

Answer: a
Explanation: As the heat transfer coefficient is hwall Dp/Kg=1.94 Re0.5 Pr0.33 and the Reynolds number is directly proportional to Vs, hence a power of 0.5 decreases h with increasing Re.

32. For very high dp/di, the mixing is very large and the heat transfer coefficient is ______
a) Very low
b) Very high
c) Low
d) High
View Answer

Answer: c
Explanation: The heat transfer coefficient increases because there is now rapid mixing of the Fluid passing through the voids.

33. Which one of the following working model is best suited for fluidized bed combustion boilers?
a) Pneumatic conveying regime
b) Laminar film fluidised bed
c) Moving bed (Dense flow
d) Bubbling fluidized beds
View Answer

Answer: d
Explanation: As the question suggests, fluidized bed combustion boilers commonly use bubbling fluidized beds or turbulent regime to manage the fly ash properly and to have an economic model for long term use.

34. Which one of the heat transfer processes are not involved in a fluidised bed?
a) Heat transfer between different points in the bed
b) Gas-wall heat transfer
c) Heat transfer to the submerged surfaces in contact with the bed
d) Heat transfer between the fluidized bed particles and the larger particles floating in the bed
View Answer

Answer: b
Explanation: In fluidised beds, wall heat transfer does not take place, this particular design is exclusive to packed beds. Rather fluidised beds have reactive solids which react, produce heat and leave the bed immediately.

35. On complete fluidisation, which one of the following is zero?
a) Heat transfer between different points in the bed
b) Gas-wall heat transfer
c) Heat transfer to the submerged surfaces in contact with the bed
d) Heat transfer between the fluidized bed particles and the larger particles floating in the bed
View Answer

Answer: a
Explanation: Gas –particle heat transfer is the constant phenomenon in fluidised bed, but on fluidisation, the temperature of the bed becomes constant and no heat is then transferred between different points in the bed.

36. Heat transfer between the active particle and the fluidized bed is controlled by three mechanisms given below, identify the wrong entry.
a) Particle convection
b) Radiation
c) Particle conduction
d) Gas convection
View Answer

Answer: c
Explanation: The three modes of heat transfer are: gas convection, particle convection and radiation. There is no particle-particle conduction taking place because of fluidisation which makes all the surface of the particles in bed in contact with the fluid.

37. Which one of the following is not a suitable application of evaporators?
a) Heating
b) Refrigeration
c) Crystallisation
d) Cooling
View Answer

Answer: a
Explanation: Heating is not a possible application of evaporators, whereas it is usually used for concentrating solutions as a feed to crystallization, re-evaporation of compressed liquids, refrigeration applications, and generation of vapours for process applications.

38. The following are few demerits of using short tube vertical evaporators, select the incorrect one.
a) Very low heat transfer coefficients with thin fluids
b) Corrosive fluids cannot be used as it increases cleaning cost
c) The fluid stays a long time above the tubes which takes long time to heat up
d) Convoluted tube increase the cost of manufacture
View Answer

Answer: a
Explanation: The short tube evaporators are most commonly used with thin fluids as they do not scale and do not accumulate at the top. These fluids hence provide large heat transfer coefficients.

39. Which one of the following is not an advantage of Long tube evaporators?
a) Good heat transfer coefficients at low temperature gradients
b) Thin fluids have very large product economy
c) Relatively inexpensive to manufacture
d) Low head space required
View Answer

Answer: d
Explanation: In long tube vertical evaporators, corrosive fluids cannot be used as the setup is not easy to dismantle and clean and hence we usually use cleaner fluids whose deposits can be removed by water. It also requires large head space to accommodate the fluid that is falling/climbing.

40. The following are few demerits of using short tube vertical evaporators, select the incorrect one.
a) Very low heat transfer coefficients with thick fluids
b) Corrosive fluids cannot be used as it increases cleaning cost
c) Long tubes efficiently evaporate and hence recirculation is hardly required
d) Large head room requirement
View Answer

Answer: c
Explanation: The long tube evaporators use recirculation as the natural convection procedure does not guarantee complete heating of the fluid at the film which reduces evaporation. To overcome this, we use recirculation.

41. Which one of the following is not an advantage of forced convection boiling?
a) Very cheap to operate
b) Positive circulation
c) High heat transfer coefficient
d) Low fouling or scaling
View Answer

Answer: a
Explanation: The advantages of forced circulation evaporators can be summarized as –
i. High heat-transfer coefficients
ii. Positive circulation
iii. Reduced fouling or scaling.
Because of these high boiling ratio and extra circulation, the operation cost increases due to the electrical cost of running the agitator and pump, hence it is not usually cheap.

42. How do the Agitated film evaporator increase heat transfer coefficient?
a) It has mixers that mix the fluid
b) It is a horizontal tube evaporator with agitated outer fluid
c) It is a type of climbing film evaporator with agitators
d) It has a set of blades that keeps renewing the film
View Answer

Answer: d
Explanation: The agitated film evaporators have set of blades rotating around the film with a very small gap that keeps renewing the film and hence exposing the hot fluid to the open surface for larger evaporation.

43. Which one of the following is not an advantage of agitated film evaporator?
a) Ability of working at high vacuum (down to 0.001 mbar
b) Very low operation cost
c) Very low residence times (to avoid product degradation
d) Elevated heat transfer coefficients due to agitation.
View Answer

Answer: b
Explanation: The operation cost of agitated film is relatively high owing to the presence of pumps and motors for the agitators, hence this option (Very low operation cost) is wrong.

44. The heat transfer coefficient for rising film and falling film evaporators is same because they can be used in the same setup.
a) False
b) True
View Answer

Answer: a
Explanation: The setup of rising film and falling film might be the same but the film orientation is different for both the setups and hence the heat transfer coefficients too.

45. Why is the calculated heat transfer area more than the inner surface heat transfer area of the evaporator?
a) Because the area is on a diameter between outer and inner diameter
b) Area is more than outer surface area
c) Because the area is outer surface area
d) Because the area is equivalent to a large diameter
View Answer

Answer: a
Explanation: Yes, the given statement “Because the area is on a diameter between outer and inner diameter” is correct because the equivalent heat transfer area for the steam part is larger than the feed part, hence the calculation gives us an intermediate value.

46. Which one of the following is not an assumption in multiple effect evaporator’s calculations?
a) The entering steam is at their boiling point
b) Heat transfer surface does not undergo fouling
c) Pressure is same in every effect
d) There is no sub cooling of the condensate from different steam chests
View Answer

Answer: c
Explanation: The assumptions that are usually made while designing evaporators are:

  1. The vapours entering in to steam shell of respective effects are at their saturation temperature
  2. There is no sub cooling of the condensate from different steam chests
  3. Condensation of vapour in steam chest occurs at constant pressure
  4. There is no carry-over of liquid droplets with vapours leaving the respective effects.
  5. There is no heat dissipation to surroundings
  6. Heat transfer surface does not undergo fouling.

47. Which one of the following is not a classification of boilers?
a) Fire tube and Water tube
b) Circulation
c) Feed type
d) Pressure
View Answer

Answer: c
Explanation: The boilers are usually not classified as feed type rather the common classifications are tube-type, circulation, internal/external fired etc.

48. Avoiding the Critical heat flux is an engineering problem in heat transfer applications, such as nuclear reactors, where fuel plates must not be allowed to overheat. To cope with this, what measure can be taken?
a) Add more water
b) Add turbulence
c) Increase the pressure
d) Decrease the pressure
View Answer

Answer: c
Explanation: Increasing the pressure increases the boiling point and hence shifts the boiling curve, hence now at this higher pressure CHF is avoided.

49. Which one of the following method removes water molecule by changing its chemical composition?
a) De-moisturising
b) Dewatering
c) Dehydration
d) Drying
View Answer

Answer: c
Explanation: Drying is the process of removing moisture from a wet surface whereas dehydration is the process of complete molecular removal of water or the loss of water as a constituent. And the process removing moisture by the application of low pressure is called dewatering.

50. Which one of the following batch-drying equipment has the least drying time/ residence time?
a) Agitated vacuum dryer
b) Furnace dryer
c) Drum dryer
d) Pan – dryer
View Answer

Answer: a
Explanation: Agitated dryer is the most versatile dryer as it has the ability to handle large feed, fouling/scaling feeds, crystallising feed and many others by its advanced methods of blades. It also has very low residence times as the scraping process of these dryers speeds up the process.

51. The number of possible heat transfer units in a rotary dryer is approximately ___________
a) 6.5 – 9.5
b) 1.5 – 2.0
c) 2.0 – 3.0
d) 2.5 – 6.5
View Answer

Answer: b
Explanation: The Number of transfer units defined as the maximum heat transfer that can occur in a Heat exchanger.
To determine NTU or Effectiveness Number there are some assumptions

  1. The Heat exchanger has infinite length
  2. The rate of Heat transfer is Maximum

52. The convective heat transfer coefficients for condensation in Condensers usually lie in the range ____________
a) 2500-6000 W/m2K
b) 60-300 W/m2K
c) 0-200 W/m2K
d) 300-1000 W/m2K
View Answer

Answer: a
Explanation: Condensation, as well as evaporation, have high convective heat transfer coefficients because they are related to the latent heat of vaporization of water which is equal to 2260 W/m2 K.


Chapterwise Multiple Choice Questions on Heat Transfer Operations

Heat Transfer Operations MCQ - Multiple Choice Questions and Answers

Our 1000+ MCQs focus on all topics of the Heat Transfer Operations subject, covering 100+ topics. This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. You can practice these MCQs chapter by chapter starting from the 1st chapter or you can jump to any chapter of your choice.
  1. Heat Transfer Equipment
  2. Double Pipe Heat Exchangers
  3. Shell and Tube Heat Exchangers
  4. Extended Surface Heat Exchangers
  5. Heat Transfer in Vessels, Agitated Vessels & Scraped Surface Heat Exchangers
  6. Heat Transfer in Packed Beds & Fluidised Beds
  7. Evaporators
  8. Boilers
  9. Dryers
  10. Condensers

1. MCQ on Heat Transfer Equipment

The section contains multiple choice questions and answers on heat transfer equipment classification, pipe wall temperature, plate type and double pipe heat exchangers, multipass heat exchangers, conduction and convection of heat transfer, shell and tube heat exchangers.

  • Classification of Heat Transfer Equipment
  • Pipe Wall Temperature and Flow in Pipe Profiles
  • Plate – Type Heat Exchangers
  • Double Pipe Heat Exchangers
  • Shell and Tube Heat Exchangers
  • Combined Heat Transfer by Conduction and Convection
  • Temperature Patterns in Multipass Heat Exchangers
  • 2. Multiple Choice Questions on Double Pipe Heat Exchangers

    The section contains questions and answers on dirt factor, heat transfer coefficients, double pipe heat exchanges construction and operation, heat transfer and pressure drop calculations.

  • Dirt Factor and Overall Heat Transfer Coefficients
  • Construction and Operation of Double Pipe Heat Exchanger
  • Calculations on Heat Transfer Coefficients
  • Pressure Drop Calculations
  • 3. MCQ on Shell and Tube Heat Exchangers

    The section contains MCQs on shell and tube heat exchanger construction and operation, log mean temperature, shell side diameter, concurrent and countercurrent operations, pressure drop calculations, heat transfer area, tube diameter, length and tube arrangements.

  • Construction and Operation of Shell and Tube Heat Exchanger
  • Log-Mean Temperature Difference and Correction Factor
  • Effective Diameter in Shell Side
  • Concurrent and Countercurrent Operation
  • Heat Transfer Area, Tube Diameter, Length and Tube Arrangements
  • Shell and Tube Heat Exchangers – Pressure Drop Calculations
  • Miscellaneous Questions
  • 4. Multiple Choice Questions on Extended Surface Heat Exchangers

    The section contains multiple choice questions and answers on surface heat exchangers design, construction and operation, fin efficiency and heat transfer coefficients.

  • Design
  • Construction and Operation
  • Fins in Industrial Use, Fin Efficiency & Overall Heat Transfer Coefficients
  • 5. MCQ on Heat Transfer in Vessels, Agitated Vessels & Scraped Surface Heat Exchangers

    The section contains questions and answers on agitated vessels design and operations, transient heating and cooling, jacketed vessels, internal coils, scraped surface heat exchangers design and operations.

  • Design and Operations
  • Agitated Vessels Heat Transfer Coefficients
  • Transient Heating and Cooling
  • Jacketed Vessels and Internal Coils
  • Scraped Surface Heat Exchangers Design and Operations
  • 6. Multiple Choice Questions on Heat Transfer in Packed Beds & Fluidised Beds

    The section contains MCQs on packed and fluidised beds heat transfer mechanisms, pressure drop calculations, bed temperature profiles and heat transfer coefficients.

  • Packed Beds – Mechanism of Heat Transfer
  • Packed Beds – Pressure Drop Calculations
  • Packed Beds – Bed Temperature Profiles
  • Packed Beds – Heat Transfer Coefficients
  • Fluidised Beds – Mechanism of Heat Transfer
  • Fluidised Beds – Bed Temperature Profiles
  • Fluidised Beds – Heat Transfer Coefficients
  • 7. Heat Transfer Operation MCQ on Evaporators

    The section contains multiple choice questions and answers on evaporators types, liquid characteristics, single effect operations, short and long tube vertical evaporators, climbing and falling film evaporator, forced circulation and agitated film evaporator, evaporator capacity, duhrings rule, enthalpy concentration diagram, feeding types, multiple effect evaporators, liquid head effect, multiple effect evaporators economy, capacity and calculations.

  • Types of Evaporators
  • Liquid Characteristics
  • Single Effect Operations
  • Short Tube Vertical Evaporator
  • Long Tube Vertical Evaporators
  • Climbing Film Evaporator
  • Falling Film Evaporator
  • Forced Circulation Evaporator
  • Agitated Film Evaporator
  • Evaporator Capacity
  • Boiling Point Elevation
  • Duhring’s Rule
  • Evaporators – Heat Transfer Coefficients
  • Enthalpy for a Single Evaporator
  • Enthalpy Concentration Diagram
  • Types of Feeding
  • Multiple Effect Evaporators
  • Capacity and Economy of Multiple Effect Evaporators
  • Effect of Liquid Head and Boiling Point Elevation
  • Multiple Effect Calculations
  • 8. Heat Transfer Operation Multiple Choice Questions on Boilers

    The section contains questions and answers on boiling basics and equipment, boiling curve properties and calculations, reboiler classifications, reboiler types and kettle reboiler.

  • Boiling and Equipment
  • General Overview of Boiling
  • Boiling Curve Properties
  • Boiling Curve Calculations
  • Reboiler Classifications
  • Types of Reboiler
  • Kettle Reboiler
  • 9. Heat Transfer Operation MCQ on Dryers

    The section contains MCQs on dryers overview and properties, kelvin equation, moisture isotherms, temperature profile and drying curves, common dryers, continuous flow dryers and microwave drying.

  • General Overview of Dryers
  • Properties of Dryers
  • Kelvin Equation
  • Moisture Isotherms
  • Temperature Profile and Drying Curves
  • Common Dryers
  • Continuous Flow Dryers
  • Microwave Drying
  • 10. Heat Transfer Operation Multiple Choice Questions on Condensers

    The section contains multiple choice questions and answers on condensers overview, heat transfer coefficients, direct and indirect contact condensers, condensers types, temperature enthalpy diagrams, condensers recap, refrigeration systems and condensers.

  • Condensers Overview
  • Condensers – Heat Transfer Coefficients – 1
  • Condensers – Heat Transfer Coefficients – 2
  • Direct Contact Condensers
  • Indirect Contact Condensers
  • Types of Condensers
  • Temperature Enthalpy Diagrams
  • Refrigeration Systems
  • Condensers in Refrigeration – 1
  • Condensers in Refrigeration – 2
  • Condensers Recap
  • If you would like to learn "Heat Transfer Operations" thoroughly, you should attempt to work on the complete set of 1000+ MCQs - multiple choice questions and answers mentioned above. It will immensely help anyone trying to crack an exam or an interview.

    Wish you the best in your endeavor to learn and master Heat Transfer Operations!

    advertisement
    Manish Bhojasia - Founder & CTO at Sanfoundry
    Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

    Subscribe to his free Masterclasses at Youtube & discussions at Telegram SanfoundryClasses.