IndiaBIX

Chemical Engineering - Process Equipment and Plant Design

Exercise : Process Equipment and Plant Design - Section 2
31.
Pick out the wrong statement about the design of a sieve plate column.
An increased weir height improves the tray efficiency at the cost of high plate pressure drop; optimum wear height being 40-90 mm for column pressure above atmospheric and 6-12 mm for vacuum columns.
For segmental downcomers, the chord length is 60-80% of the column diameter. An initial value of downcomer area of 12% is taken in the design.
Width of the calming section provided at the inlet and outlet sides of the plate is 75 mm for column diameter below 1.5 metres and 100 mm for larger diameter columns.
Minimum recommended downcomer residence time for the disengagement of entrained vapour is the same for both foaming and non-foaming liquids, which is about 20 seconds.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.
10
20
30
5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.
0.1 to 0.25
0.3 to 0.5
0.5 to 0.6
0.65 to 0.80
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
In a __________ rivetted joint, the rivets in the various rows are opposite to each other.
zig-zag
chain
diamond
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Pick out the wrong statement:
The tensile strength of a brittle material is less than its compressive strength.
The compressive strength of a ductile materia] is less than its tensile strength.
In a thick cylindrical shell, the hoop stress is maximum at the inner radius.
The value of crushing load is more than that of buckling load for long colmns.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers