Discussion
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- Question
In the design of a paddle agitator, the ratio
is normally taken as
Options- A. 0.1
- B. 0.8
- C. 0.25
- D. 0.5
- Correct Answer
- 0.8
- 1. __________ shapedroof is the most commonly used roof for cylinderical storage tanks.
Options- A. Conical
- B. Flat
- C. Dome
- D. Umbrella Discuss
- 2. Diameter of the seive tray column is determined by the
Options- A. lower limit of vapour velocity.
- B. upper limit of the vapour velocity.
- C. hole diameter of the seive tray.
- D. height of the plate spacing. Discuss
- 3. A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by
Options- A. (ph - dh)/ph
- B. (ph - dh . dt/2)/ph
- C. (ph - dt)/ph
- D. (ph - dh)/dh Discuss
- 4. Normal screwed fittings are used for pipes upto a diameter of __________ inches.
Options- A. 1.5
- B. 3
- C. 5
- D. 7 Discuss
- 5. Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.
Options- A. Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column.
- B. Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hence insulation required is less.
- C. Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm2 .
- D. Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2 . Discuss
- 6. In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is
Options- A. < 10
- B. > 10
- C. > 20
- D. 30 Discuss
- 7. __________ is the determining factor for the number of bubble caps to be used per tray.
Options- A. Permissible slot velocity
- B. Tray diameter
- C. Liquid load
- D. Vapor load Discuss
- 8. At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure
Options- A. increases
- B. decreases
- C. remains same
- D. may increase or decrease depending upon the solubility of the gas in the liquid Discuss
- 9. If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of
Options- A. D/2 or minimum 2" to 5D.
- B. D/5 or minimum 2" to 5D.
- C. D/5 or minimum 2" to D.
- D. none of these. Discuss
- 10. Weep holes provided in the plates of a distillation column
Options- A. facilitate draining out liquid from a tray when the unit is not in operation.
- B. are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid.
- C. must be large enough (usually 1/4" to 5/8" dia) to prevent plugging but should not deliver excessive amount of fluid during operation.
- D. all (a), (b) and (c). Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: Conical
Correct Answer: upper limit of the vapour velocity.
Correct Answer: (ph - dt)/ph
Correct Answer: 3
Correct Answer: Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2 .
Correct Answer: > 10
Correct Answer: Permissible slot velocity
Correct Answer: remains same
Correct Answer: D/5 or minimum 2" to 5D.
Correct Answer: all (a), (b) and (c).
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