Chemical Engineering Mcqs

Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or ______________ times the column diameter, whichever is lower?

(A) 2.5-3.0
(B) 5-7.5
(C) 10-12.5
(D) 15-20

Submitted By :Ali Uppal

Accidents in chemical plants are mostly due to___________________?

(A) Inadequate equipment design
(B) Faulty operating procedures
(C) Improper layout of the equipments
(D) Failure of equipments

Submitted By :Ali Uppal

The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area ‘A’ is given by (where, P = perimeter of the channel in contact with the fluid) ?

(A) 4 A/P
(B) A/P
(C) 4 P/A
(D) √A

Submitted By :Ali Uppal

The buckling tendency of compression members is always in the direction of the _____________________?

(A) Least radius of gyration
(B) Axis of the load
(C) Perpendicular to the axis of the load
(D) None of these

Submitted By :Ali Uppal

____________ is the determining factor for the number of bubble caps to be used per tray?

(A) Permissible slot velocity
(B) Tray diameter
(C) Liquid load
(D) Vapor load

Submitted By :Ali Uppal

Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger ?

(A) 75% cut segmental baffle
(B) 25% cut segmental baffle
(C) Orifice baffle
(D) Disk and doughnut baffle

Submitted By :Ali Uppal

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

Submitted By :Ali Uppal

A binary liquid Azeotropic mixture has boiling point lower than either of the components, when it shows _____________ deviation from Raoult’s Law?

(A) Positive
(B) Negative
(C) No
(D) None of these

Submitted By :Ali Uppal

Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about ______________ mm?

(A) 10
(B) 50
(C) 100
(D) 200

Submitted By :Ali Uppal

Optimum reflux ratio in a continuous distillation column is determined by the__________________?

(A) Maximum permissible vapour velocity
(B) Flooding limit of the column
(C) Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
(D) None of these

Submitted By :Ali Uppal

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