Apex angle of conical heads used in the bottom heads of chemical process equipme

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Question
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually
Options
A. 30�
B. 45�
C. 60�
D. 75�

Correct Answer

60�

Process Equipment and Plant Design problems

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1. In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.
Options
A. molal flow rate of vapour
B. vapour molecular weight
C. pressure and temperature
D. all (a), (b) and (c)

3. "A claming section" before the liquid flows into the downcomer is privided to
Options
A. permit release of entrained vapour in the liquid.
B. reduce the discharge fluctuation.
C. ensure better vapour-liquid contact.
D. cool the liquid before it flows down.

4. Which of the following factors determine the amount of entrainment in a distillation column?
Options
A. Plate spacing.
B. Depth of liquid above the bubble cap slots.
C. Vapour velocity in the volume between the plates.
D. All (a), (b) and (c).

8. Pressure drop due to pipe fittings can be estimated by the equation,
, where, L_e = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (dimensionless) for 45� elbow and 180� close return bends would be respectively around
Options
A. 5 and 10
B. 45 and 75
C. 180 and 300
D. 300 and 500

10. Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing
Options
A. rupture diaphragm
B. dikes
C. surge chamber
D. none of these

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