Discussion
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- Question
The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is
Options- A. 0
- B. ?
- C. 1
- D. minimum
- Correct Answer
- ?
- 1. With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.
Options- A. fixed charges initially
- B. running cost of cooling water for condenser
- C. vapour & liquid load both
- D. running cost of steam for reboiler Discuss
- 2. LMTD correction factor is used in heat exchanger design for
Options- A. double pipe heat exchanger.
- B. multipass shell and tube heat exchanger.
- C. fouling fluids.
- D. counter flow of hot and cold fluids. Discuss
- 3. A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the
Options- A. central dished section and corner torus section.
- B. corner torus section and central dished section.
- C. central dished section and straight flange section.
- D. straight flange section and corner torus section. Discuss
- 4. Generally, elliptical dished heads
Options- A. are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m2 .
- B. resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter.
- C. are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D.
- D. all (a), (b) and (c) Discuss
- 5. Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele's method, this method
Options- A. is more accurate in finding the number of equilibrium stages.
- B. accounts for the enthalpy changes in the process.
- C. facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in this method.
- D. all 'a', 'b' & 'c'. Discuss
- 6. Vertical vessels are not supported by
Options- A. brackets
- B. skirts
- C. columns
- D. saddles Discuss
- 7. Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter )
Options- A. 0.2 D
- B. 0.5 D
- C. 0.66 D
- D. 0.80 D Discuss
- 8. Thickness of the frame of a plate and frame filter as compared to that of plates is
Options- A. less
- B. same
- C. more
- D. either (a) or (b) Discuss
- 9. In a __________ rivetted joint, the rivets in the various rows are opposite to each other.
Options- A. zig-zag
- B. chain
- C. diamond
- D. none of these Discuss
- 10. Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the
Options- A. flow rates of each fluid.
- B. type and size of packing.
- C. concentration of each fluid.
- D. all a, b & c. Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: fixed charges initially
Correct Answer: multipass shell and tube heat exchanger.
Correct Answer: central dished section and corner torus section.
Correct Answer: all (a), (b) and (c)
Correct Answer: all 'a', 'b' & 'c'.
Correct Answer: saddles
Correct Answer: 0.2 D
Correct Answer: more
Correct Answer: chain
Correct Answer: all a, b & c.
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