Discussion
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- Question
The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from
Options- A. 2 to 3
- B. 3 to 5
- C. 4 to 8
- D. 6 to 12
- Correct Answer
- 4 to 8
- 1. The units of Young's modulus of elasticity and __________ are the same.
Options- A. strain
- B. stress
- C. modular ratio
- D. none of these Discuss
- 2. Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to
Options- A. 5 cms
- B. 40% of the I.D. of the shell
- C. 25 cms
- D. I.D. of the shell Discuss
- 3. The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure.
Options- A. 1.5 to 2
- B. 3 to 4
- C. 4 to 5
- D. >5 Discuss
- 4. __________ liquor is best handled in a long tube vertical evaporator.
Options- A. Foamy
- B. Scaling
- C. Viscous
- D. Salting Discuss
- 5. Heat transfer co-efficient, hG(Kcal/hr.m2 .°C) and mass velocity of air, G (kg/hr.m2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to
Options- A. hG = 1.004G0.37
- B. 1.004G0.8
- C. hG = 0.0176G0.37
- D. 0.0176G1.37 Discuss
- 6. The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is
Options- A. 0.25
- B. 0.50
- C. 0.75
- D. 1.25 Discuss
- 7. A/an __________ is used for changing the direction of a pipeline.
Options- A. elbow
- B. union
- C. flange
- D. disc compensator Discuss
- 8. Value of Peclet number = 0, is the representative of
Options- A. laminar flow.
- B. complete back mixing.
- C. plug flow.
- D. eddy diffusivity = 0. Discuss
- 9. Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around
Options- A. 2.5"
- B. 0.5"
- C. 5"
- D. 50% of the plate spacing Discuss
- 10. For turbulent flow (NRe > 2100) of low viscosity fluid (? > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec.? = fluid density, lb/ft3 ? = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches)
Options- A. Di, opt = 3.9 Q0.45 ?0.13
- B. Di, opt = 3.9 Q0.45 . ?0.95
- C. Di, opt = 4.7 Q0.36 . ?3.2?0.13
- D. Di, opt = 3 Q0.36 . ?0.88 Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: stress
Correct Answer: 5 cms
Correct Answer: 1.5 to 2
Correct Answer: Foamy
Correct Answer: hG = 1.004G0.37
Correct Answer: 0.25
Correct Answer: elbow
Correct Answer: complete back mixing.
Correct Answer: 0.5"
Correct Answer: Di, opt = 3.9 Q0.45 ?0.13
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