Process Equipment and Plant Design problems
- 1. 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
Correct Answer: 0.25
- 2. A/an __________ is used for changing the direction of a pipeline.
Options- A. elbow
- B. union
- C. flange
- D. disc compensator Discuss
Correct Answer: elbow
- 3. 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
Correct Answer: complete back mixing.
- 4. 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
Correct Answer: 0.5"
- 5. 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
Correct Answer: Di, opt = 3.9 Q0.45 ?0.13
- 6. To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to
Options- A. 0.5 d
- B. d
- C. 1.5 d
- D. 2.5 d Discuss
Correct Answer: 1.5 d
- 7. In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a
Options- A. clearance of 25-75 mm.
- B. cap pitch of 1.3-2 times the cap diameter.
- C. either 'a' or 'b'.
- D. neither 'a' nor 'b'. Discuss
Correct Answer: either 'a' or 'b'.
- 8. Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is
Options- A. same
- B. less
- C. about 3 times
- D. about 0.33 times Discuss
Correct Answer: about 3 times
- 9. Hoop (circumferential) stress induced in a thin walled 'Horton Sphere' used for the storage of liquid ammonia under pressure is
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 10. The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.
Options- A. equal to
- B. more than
- C. less than
- D. either (b) or (c); depends on maximum permissible internal pressure Discuss
Correct Answer: more than
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