- (A) Plate efficiency increases with increase in superficial vapour velocity till entrainment limit
- (B) Increase in depth of the liquid about the slots increases the plate efficiency, particularly if the liquid depth is < 1"
- (C) Too small a plate spacing can cause a low efficiency, if the vapour velocity is greater than the allowable value
- (D) None of these
Chemical Engineering Mcqs
- (A) Riveting provides a permanent fastening method
- (B) The joint made by overlapping of one plate over the other, and then riveting the two plates together with two rows of rivets is called ‘double riveted butt joint’
- (C) Shank diameter of the rivets should be less than the size of the hole drilled in the plate for riveting
- (D) The efficiency of a riveted joint is the ratio of the strength of the riveted joint to the strength of the solid plate
- (A) The tensile strength of a brittle material is less than its compressive strength
- (B) The compressive strength of a ductile material is less than its tensile strength
- (C) In a thick cylindrical shell, the hoop stress is maximum at the inner radius
- (D) The value of crushing load is more than that of buckling load for long columns
- (A) It is preferred to use a vertical condenser for condensation of vapor from a distillation column without sub-cooling
- (B) Draining of residual liquid on tray during shut down of distillation column is facilitated by weep holes
- (C) Random packing a packed tower offers the advantage of lower pressure drop and higher throughput of fluids as compared to regular/stacked packing
- (D) Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding
- (A) Silica
- (B) Carborundum
- (C) Fireclay
- (D) Magnesite
- (A) Increases
- (B) Lowers
- (C) Does not affect
- (D) Either
- (A) 3Al2O3.2SiO2
- (B) Al2O3
- (C) ZrSO4
- (D) ThO2
- (A) Fusion point
- (B) Spalling resistance
- (C) Slag penetration resistance
- (D) Refractoriness under load (RUL)
- (A) 30
- (B) 50
- (C) 70
- (D) 90
- (A) 5
- (B) 20
- (C) 40
- (D) 55
