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

Related Mcqs:

1. Value of Peclet number = ∞, 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. Poisson’s ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson’s ratio for structural and pressure vessel steel may be taken as ____________________?

   A. 0.01
   B. 0.3
   C. 0.75
   D. 0.95

4. The ratio of linear stress to linear strain is termed as the ____________________?

   A. Modulus of elasticity
   B. Modulus of rigidity
   C. Bulk modulus
   D. None of these

5. Maximum allowable vapour velocity in a bubble cap tower is determined by the ____________________?

   A. Entrainment considerations
   B. Vapour density
   C. Diameter of the column
   D. None of these

6. ____________________ strain is measured using a ‘strain rosetter’ ?

   A. Volumetric
   B. Shear
   C. Linear
   D. None of these

7. n the agitators, the power required will be changed with the increase of diameter of agitator D. as ____________________?

   IA. D2
   B. D5
   C. D
   D. D9

8. For a given fluid, as the pipe diameter increases, the pumping cost ____________________?

   A. Decreases
   B. Increases
   C. Remain unaffected
   D. May increase or decrease depending upon whether the fluid is Newtonian or non-Newtonian

9. To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to ____________________?

   A. 0.5 d
   B. d
   C. 1.5 d
   D. 2.5 d

10. Weep holes provided in the plates of a distillation column ____________________?

    A. Facilitate draining out liquid from a tray when the unit is not in operation
    B. Are normally located near the overflow weir so that any delivery of liquid during operation
    follows approximately the same path as the overflow fluid
    C. Must be large enough (usually 1/4″ to 5/8″ dia) to prevent plugging but should not deliver
    excessive amount of fluid during operation
    D. All A., B. and C.