Discussion
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- Question
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.
- Correct Answer
- Safety valves are provided in heat exchangers for removal of non-conden-sables.
- 1. 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
- 2. 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
- 3. Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation?
Options- A. Sorel-Lewis method.
- B. McCabe-Thiele's method.
- C. Ponchon-Savarit method.
- D. none of these. Discuss
- 4. Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower?
Options- A. Size, shape, orientation and surface of the packing particles.
- B. Density and viscosity of fluids.
- C. Fluid flow rates.
- D. All (a), (b) and (c). Discuss
- 5. Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.
Options- A. Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution.
- B. Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids.
- C. The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty.
- D. In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes. Discuss
- 6. 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
- 7. 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
- 8. __________ strain is measured using a 'strain rosetter'.
Options- A. Volumetric
- B. Shear
- C. Linear
- D. none of these Discuss
- 9. 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
- 10. 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
Process Equipment and Plant Design problems
Search Results
Correct Answer: decreases
Correct Answer: nozzle or rim
Correct Answer: Sorel-Lewis method.
Correct Answer: All (a), (b) and (c).
Correct Answer: The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty.
Correct Answer: withstand higher pressure for a given metallic shell thickness.
Correct Answer: 4 to 10
Correct Answer: Linear
Correct Answer: both (a) & (b).
Correct Answer: -q/(1-q)
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