Which of the following efficiencies can be greater than 100%?

10. Which of the following efficiencies can be greater than 100%?
o Murphree plate efficiency
o Point efficiency
o Overall plate efficiency
o None of these



Ans: A

Cvlinderical shell thickness of rotary drier is generally ________________ mm

9. Cvlinderical shell thickness of rotary drier is generally ________________ mm
o 2-3
o 6-81
o 12-15
o 18-22

Ans: B

A minimum clearance of about __________________ mm is maintained between the distillation column wall and the bubble cap

8. A minimum clearance of about __________________ mm is maintained between the distillation column wall and the bubble cap
o 19
o 38
o 76
o 96

Ans: B

In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by _________________ times the hole diameter

7. In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by _________________ times the hole diameter
o 21
o 5
o 10
o 20

Ans: A

Frame thickness in the plate and frame filter press is normally in the range of _________ inches.

6. Frame thickness in the plate and frame filter press is normally in the range of _________ inches.
o 1 to 5
o 1 to 12
o O.25 to 81
o O.25 to 4

Ans: C

A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

5. A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is
o bending
o elongation
o deformation
o shear

Ans: A

Wind load consideration in the design of a support can be neglected, when the vessel is

4. Wind load consideration in the design of a support can be neglected, when the vessel is
o tall but empty
o tall (say 30 metres), but is full of liquid
o short (< 2 m) and housed indoor I
o none of these

Ans: C