Process Equipment and Plant Design problems
- 1. Which of the following types of reactors is the safest from operation point of view?
Options- A. A vapor phase reactor.
- B. Pot type reactor.
- C. A liquid phase reactor.
- D. A liquid phase catalytic reactor. Discuss
Correct Answer: A vapor phase reactor.
- 2. 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
Correct Answer: Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2 .
- 3. Normal screwed fittings are used for pipes upto a diameter of __________ inches.
Options- A. 1.5
- B. 3
- C. 5
- D. 7 Discuss
Correct Answer: 3
- 4. 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
Correct Answer: (ph - dt)/ph
- 5. 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
Correct Answer: upper limit of the vapour velocity.
- 6. __________ shapedroof is the most commonly used roof for cylinderical storage tanks.
Options- A. Conical
- B. Flat
- C. Dome
- D. Umbrella Discuss
Correct Answer: Conical
- 7. 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 Discuss
Correct Answer: 0.8
- 8. 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
Correct Answer: > 10
- 9. __________ 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
Correct Answer: Permissible slot velocity
- 10. 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
Correct Answer: remains same
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