Value of Peclet number = ∞, is the representative of___________________?

Related Mcqs:

1. Value of Peclet number = 0, is the representative of ____________________?

   A. Laminar flow
   B. Complete back mixing
   C. Plug flow
   D. Eddy diffusivity = 0

2. The practical representative values of HETP for a number of commercial operations lies within a range of ______________ metre?

   A. 0.1-0.2
   B. 0.2-0.5
   C. 0.4-0.9
   D. 1.2-1.5

3. Height of the flights in the rotary drier is in the range of___________________?

   A. 0.08 to 0.12 d
   B. 0.02 to 0.05 d
   C. 0.2 to 0.5 d
   D. 0.5 to 0.6 d

4. Hold up of material in a operating rotary drier is in the range of___________________?

   A. 0.05 to 0.15
   B. 0.25 to 0.50
   C. 0.5 to 0.8
   D. 0.8 to 0.9

5. What is the value of ‘q’ for saturated vapor feed to a distillation column? (where q = fraction of the feed stream that is liquid ?

   A. 0
   B. 1
   C. 1

6. 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?

   A. Equal to
   B. Half
   C. One fourth
   D. Three fourth

7. For identical situation, condensing film coefficient in case of a horizontal condenser is almost ______________ the value expected in case of vertical condenser?

   A. Half
   B. Twice
   C. Thrice
   D. Five times

8. (Le/D) for fully open globe value may be around__________________?

   A. 10
   B. 25
   C. 75
   D. 300

9. For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylindrical vessel, what value of weld joint efficiency should be used ?

   A. 0.8
   B. 0.9
   C. 1.0
   D. (0.8)0.5

10. A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?

    A. 45
    B. 60
    C. 80
    D. 95