Process Plant Design Online Practice Test - Set 10 - ObjectiveBooks

# Practice Test: Question Set - 10

1. Hole diameter of the sieve trays in the distillation column ranges from _________ mm.
(A) 1 to 3
(B) 4 to 8
(C) 3 to 12.5
(D) 12.5 to 18.5

2. 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

3. Pick out the wrong statement pertaining to the design of the distillation column.
(A) Generally, a skirt clearance of 0.5" to 1.5' is recommended to prevent plugging of the slots by residue build up
(B) The purpose of the slot is to disperse the gas into the liquid in the form of small bubbles
(C) If sufficient slot area is not provided, the gas may pass through the skirt clearance
(D) None of these

4. A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by
(A) (ph - dh)/ph
(B) (ph - dh . dt/2)/ph
(C) (ph - dt)/ph
(D) (ph - dh)/dh

5. The force due to wind load acting on a tall vessel depends upon its
(A) Shape
(B) Outside diameter
(C) Height
(D) All (a), (b) & (c)

6. The thermal stress in a metallic bar does not depend upon the
(A) Changes in temperature
(B) Cross-sectional area
(C) Both (a) and (b)
(D) Neither (a) nor (b)

7. Brass valves are usually made for pipe sizes _________ inches.
(A) ≤ 1
(B) ≤ 2
(C) > 2.5
(D) > 3.5

8. Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as
(A) d = 1.1 t
(B) d = 1.6 √t
(C) d = 1.5 t
(D) d = 3 √t

9. The normal range of velocity of water in pipes is _________ m/sec.
(A) 0.1-0.5
(B) 1-2
(C) 10-50
(D) 15-30

10. Steam is preferred to be used as a heating medium in heat exchangers, because of its
(A) Low cost
(B) High latent heat
(C) Non-corrosive condensate
(D) High film co-efficient

11. What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?
(A) 6.5 cms
(B) 6.5 mm
(C) Equal to tube I.D
(D) Equal to tube O.D

12. 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

13. Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger.
(A) The corrosive and fouling fluid should be preferably routed through the tubes
(B) The viscous fluid should be routed through the shell side
(C) Lower flow rate fluid should be routed through the shell side
(D) Higher pressure fluid stream should be routed through the shell side

14. The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)
(A) 0.5 d
(B) 0.75 d
(C) d
(D) 2 d

15. Rate of filtrate delivery is inversely proportional to the
(A) Filtering area & the pressure difference driving force
(B) Viscosity of filtrate
(C) Cake & filter medium resistance
(D) Both (a) and (b)

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