Discussion
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- Question
Air is best heated with steam in a heat exchanger of
Options- A. plate type.
- B. double pipe type with fin on steam side.
- C. double pipe type with fin on air side.
- D. shell and tube type.
- Correct Answer
- double pipe type with fin on air side.
- 1. Pick out the wrong statement.
Options- A. Orifice baffles are never used in a shell and tube heat exchanger.
- B. Pressure drop on the shell side of a heat exchanger depends upon tube pitch also.
- C. In a horizontal tube evaporator, surface blanketing by air is avoided.
- D. Split ring type and pull through type floating heads are two commonly used floating heads is heat exchangers. Discuss
- 2. Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is
Options- A. IR
- B. I2R
- C. IR2
- D. I2R2 Discuss
- 3. Fourier's law applies to the heat transfer by
Options- A. convection
- B. radiation
- C. conduction
- D. all (a), (b) & (c) Discuss
- 4. Shell side pressure drop in a shell and tube heat exchanger does not depend upon the
Options- A. baffle spacing & shell diameter.
- B. tube diameter & pitch.
- C. viscosity, density & mass velocity of shell side fluid.
- D. none of these. Discuss
- 5. Crystal size in a continuous crystalliser depends upon the
Options- A. rate of heat transfer.
- B. degree of turbulence.
- C. degree of supersaturation.
- D. all (a), (b) and (c). Discuss
- 6. The equivalent diameter for pressure drop is __________ that for heat transfer.
Options- A. smaller than
- B. greater than
- C. equal to
- D. not related with Discuss
- 7. Which is the controlling factor for a drum drier?
Options- A. Diffusion
- B. Heat transfer
- C. Both (a) and (b)
- D. Neither (a) nor (b) Discuss
- 8. When the temperature and humidity of air is low, we usually use __________ draft cooling tower.
Options- A. natural
- B. forced
- C. induced
- D. none of these Discuss
- 9. Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.
Options- A. chemical properties
- B. physical properties
- C. degree of turbulence
- D. interfacial area Discuss
- 10. With increase in pressure, the relative volatility for a binary system
Options- A. increases.
- B. decreases.
- C. remains same.
- D. either (a) or (b), depends on the system. Discuss
Heat Transfer problems
Search Results
Correct Answer: Orifice baffles are never used in a shell and tube heat exchanger.
Correct Answer: I2R
Correct Answer: conduction
Correct Answer: none of these.
Correct Answer: all (a), (b) and (c).
Correct Answer: smaller than
Correct Answer: Heat transfer
Correct Answer: natural
Correct Answer: chemical properties
Correct Answer: decreases.
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