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.Management Sciences
Category: Process Equipment and Plant Design
Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to___________________?
A. G0.2
B. G0.5
C. G0.8
D. G1.5
Smoker’s equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the_________________?
A. Relative volatility is close to one (e.g., separation of close boiling isomers)
B. Feed is not at its bubble point
C. Number of equilibrium stages in only stripping section is to be calculated
D. Number of equilibrium stages required is likely to be very small
High pressure fluid in a shell and tube heat exchanger should preferably be routed through the________________?
A. Tubes to avoid the expansion of high pressure shell construction
B. Shell side for smaller total pressure drop
C. Shell side, if the flow is counter-current and tube side if the flow is co-current
D. Shell side for large overall heat transfer co-efficient
Vertical vessels are not supported by____________________?
A. Brackets
B. Skirts
C. Columns
D. Saddles
Weep holes provided in the plates of a distillation column ____________________?
A. Facilitate draining out liquid from a tray when the unit is not in operation
B. Are normally located near the overflow weir so that any delivery of liquid during operation
follows approximately the same path as the overflow fluid
C. Must be large enough (usually 1/4″ to 5/8″ dia) to prevent plugging but should not deliver
excessive amount of fluid during operation
D. All A., B. and C.
Pick out the correct statement___________________?
A. Centre to centre distance between two consecutives rivets in a row is called the pitch
B. A riveted joint made in overlapping plates is called butt joint
C. Hole size drilled in riveted plates is less than the actual size of the rivet
D. None of these
In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by________________?
A. 4(0.86P2 – πd2/4)/πd
B. (P2 – πd2/4)/πd
C. 4(0.86P2 – πd2)/πd
D. (4P2 + πd2/4)/πd
Welded joint efficiency in the design of chemical process equipment is taken as_________________?
A. 0.55
B. 0.75
C. 0.85
D. 0.95
Maximum size of the raschig rings used in a packed tower is about _______________ of the column diameter?
A. 1/10th
B. 1/20th
C. 1/30th
D. 1/50th
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