The function of manholes provided in the shell of a distillation column is to

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 of the above

Correct Answer: Give access to the individual trays for cleaning, maintenance and installation

Bissoy MCQ
#Chemical Engineering #Process Equipment And Plant Design

Related Questions

Drop manholes are the manholes
A Without entry ladders
B Without manhole covers
C With depths more than 3.5 m
D Having drains at different levels
The major axis of elliptical manholes on the shell should be provided
A Longitudinally
B Circumferentially
C On dished end
D Anywhere
An adequate clearance between the tray and the shell wall of a distillation column is provided to
A Drain the liquid from the tray when the unit is not in operation
B Allow for thermal expansion and facilitate installation
C Avoid back-trapping
D None of these
Drop manholes at the junctions of sewer lines, are provided if
A Invert level of a branch sewer is more than 60 cm that of the main sewer
B Sewer line runs along a main road
C Ordinary manhole cannot be built
D Two sewer lines intersect
Sewer manholes are generally provided at
A The change of gradient
B The change of direction
C The junctions of sewers
D All of these
Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.
A Nozzle or rim
B Flared out
C Fluid in
D Ring plate
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If $${\sigma _{\text{t}}}$$ is the tensile stress for the shell material, then thickness of shell is equal to
A $$\frac{{{\text{pd}}}}{{{\sigma _{\text{t}}}}}$$
B $$\frac{{{\text{pd}}}}{{2{\sigma _{\text{t}}}}}$$
C $$\frac{{{\text{pd}}}}{{3{\sigma _{\text{t}}}}}$$
D $$\frac{{{\text{pd}}}}{{4{\sigma _{\text{t}}}}}$$
In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger.
A Once
B Twice
C Thrice
D Four times
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.
A 3-5
B 5-11
C 8-15
D 12-18
Packed column distillation is limited to the column __________ metres.
A [

A. Height

B. Diameter

B Both A & B
C Neither A nor B

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