Process Equipment and Plant Design problems
- 1. Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.
Options- A. nozzle or rim
- B. flared out
- C. fluid in
- D. ring plate Discuss
Correct Answer: nozzle or rim
- 2. With increase in gas flow rate to fabric surface area ratio (Nm3/hr/m2 fabric surface area), the size & the cost of a bag filter
Options- A. increases
- B. decreases
- C. remain unaffected
- D. none of these Discuss
Correct Answer: decreases
- 3. Pick out the wrong statement.
Options- A. Safety valves are provided in heat exchangers for removal of non-conden-sables.
- B. Liquid metals and dowtherm are used for very high temperature heating.
- C. In a shell and tube heat exchanger, high pressure fluid is generally routed through the tube.
- D. A loop seal or U-seal is provided in a vertical condenser sub-cooler to prevent quick draining of the condensate. Discuss
Correct Answer: Safety valves are provided in heat exchangers for removal of non-conden-sables.
- 4. Spherical shaped pressure vessel is considered to be the most ideal, because it can
Options- A. withstand higher pressure for a given metallic shell thickness.
- B. be fabricated very easily.
- C. be designed without wind load considerations.
- D. be supported very easily. Discuss
Correct Answer: withstand higher pressure for a given metallic shell thickness.
- 5. Length to diameter ratio of most rotary driers is in the range of
Options- A. 1 to 2
- B. 4 to 10
- C. 10 to 20
- D. 20 to 30 Discuss
Correct Answer: 4 to 10
- 6. __________ strain is measured using a 'strain rosetter'.
Options- A. Volumetric
- B. Shear
- C. Linear
- D. none of these Discuss
Correct Answer: Linear
- 7. Number of evaporators which can be used in service in a multiple effect evaporation system is limited by the
Options- A. practical limit reached, due to low heat transfer rate because of inadequate temperature difference.
- B. economic limit reached, when the plant cost exceeds the saving of steam.
- C. both (a) & (b).
- D. neither (a) nor (b). Discuss
Correct Answer: both (a) & (b).
- 8. The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)
Options- A. -q
- B. -q/(1-q)
- C. -q/(q-1)
- D. none of these Discuss
Correct Answer: -q/(1-q)
- 9. Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.
Options- A. 10
- B. 20
- C. 30
- D. 5 Discuss
Correct Answer: 30
- 10. An adequate clearance between the tray and the shell wall of a distillation column is provided to
Options- A. drain the liquid from the tray when the unit is not in operation.
- B. allow for thermal expansion and facilitate installation.
- C. avoid back-trapping.
- D. none of these. Discuss
Correct Answer: allow for thermal expansion and facilitate installation.
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