called tube pitch.
called tube clearance.
always less than the diameter of the tube.
none of these.
✅ The correct answer is option A.
Process Equipment and Plant Design MCQs
Column support for the roof of cylindrical storage tank must be provided for
small diameter tanks.
large diameter tanks.
small diameter tall tanks.
all tanks irrespective of their heights and diameters.
✅ The correct answer is option B.
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.
Flat plate
Hemispherical
Torispherical
Ellipsoidal
✅ The correct answer is option D.
The necessary wall thickness for a metallic storage vessel is a function of the
ultimate tensile strength (or yield point) of the material and operating temperature.
operating pressure and welding/joint efficiency.
diameter of the vessel.
all (a); (b) and (c).
✅ The correct answer is option D.
The circumferential (hoop) stress in a thin walled cylinderical vessel under internal pressure is
pd/2t
pd/4t
pd/t
pd/3t
✅ The correct answer is option A.
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.
1.3 to 2
1.6 to 2
2.5
1.5 to 3
✅ The correct answer is option A.
Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure ?
Larger dia vessel.
Smaller dia vessel.
Larger dia long vessel.
Strength of the vessel is same irrespective of the diameter.
✅ The correct answer is option B.
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.
25-50
50-75
200-250
750-1000
✅ The correct answer is option B.
Reflux ratio variation in a distillation column is between
zero and infinity
zero and one
minimum and infinity
none of these
✅ The correct answer is option C.
With increase in gas flow rate to fabric surface area ratio (Nm3/hr/m2 fabric surface area), the size & the cost of a bag filter
increases
decreases
remain unaffected
none of these
✅ The correct answer is option B.