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.
Chemical Engineering MCQs
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.
for fully open globe value may be around
10
25
75
300
✅ The correct answer is option D.
In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.
2-Mar
5-Aug
Oct-15
20-25
✅ The correct answer is option B.
In a __________ rivetted joint, the number of rivets decreases from the innermost row to the outermost row.
chain
diamond
zig-zag
none of these
✅ The correct answer is option B.
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.
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.
__________ liquor is best handled in a long tube vertical evaporator.
Foamy
Scaling
Viscous
Salting
✅ 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.
The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is
0
∞
1
minimum
✅ The correct answer is option B.