Process Equipment and Plant Design MCQs

101. The clearance between two tubes in a shell and tube heat exchanger is known as ‘ligament’, whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm.

by
equal to
half
one fourth
three fourth
✅ The correct answer is option C.

103. A cylindrical storage tank can have a self supported conical roof,

by
if its diameter is less than 15-20metres.
if its diameter is more than 50 meters.
if the thickness of the roof is more than that of the cylindrical shell.
irrespective of its diameter.
✅ The correct answer is option A.

106. For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for diaofthe tank in question), the thickness of the courses of shell

by
decreases upwards.
increases upwards.
remains same throughout.
may decrease or increase upwards depending upon whether vacuum or positive pressure would be maintained inside the shell.
✅ The correct answer is option A.

109. In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement

by
results in higher shell side pressure drop.
can accomodate less number of tubes for a given shell diameter.
facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell side fluid.
creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer co-efficient.
✅ The correct answer is option A.