Pick out the wrong statement pertaining to the design of the distillation column

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Question
Pick out the wrong statement pertaining to the design of the distillation column.
Options
A. Generally, a skirt clerance of 0.5" to 1.5' is recommended to prevent plugging of the slots by residue build up.
B. The purpose of the slot is to disperse the gas into the liquid in the form of small bubbles.
C. If sufficient slot area is not provided, the gas may pass through the skirt clearance.
D. none of these.

Correct Answer

none of these.

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2. The buckling tendency of compression members is always in the direction of the
Options
A. least radius of gyration.
B. axis of the load.
C. perpendicular to the axis of the load.
D. none of these.

3. A 'rupture disc' is provided in chemical equipments as an accessory meant for
Options
A. relieving excess pressure.
B. creating turbulence.
C. enhancing mixing rate.
D. avoiding vortex formation.

5. The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.
Options
A. 2
B. 1/2
C. 4
D. 1/4

6. Stress-strain diagram for low carbon steel/mild steel is shown below in the Fig.

The point 'A' on the Fig. represents the
Options
A. breaking stress
B. ultimate stress
C. elastic limit
D. yield point

8. The function of manholes provided in the shell of a distillation column is to
Options
A. keep a check on the liquid gradient over the plate by direct visual observation.
B. give access to the individual trays for cleaning, maintenance and installation.
C. guard against foaming & entrainment by dumping antifoaming agent through it.
D. all (a), (b) and (c).

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