Chemical Engineering Mcqs

In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by ______________ times the hole diameter?

(A) Two
(B) Five
(C) Ten
(D) Twenty

Submitted By :Ali Uppal

1.2 to 3.8 cms is the value of the ______________________?

(A) Downcomer liquid seal in case of a balanced tray design
(B) Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm)
(C) Skirt clearance for bubble caps
(D) All

Submitted By :Ali Uppal

The longitudinal stress induced in a thin walled cylindrical vessel under internal pressure is_________________?

(A) pd/2t
(B) pd/4t
(C) pd/t
(D) pd/8t

Submitted By :Ali Uppal

Scale up problem in design based on the similarity concept takes into account _______________ similarity?

(A) Geometrical
(B) Kinematic
(C) Dynamic
(D) All

Submitted By :Ali Uppal

For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec, ρ = fluid density, lb/ft3 μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches) ?

(A) Di, opt = 3.9 Q0.45 ρ0.13
(B) Di, opt = 3.9 Q0.45. μ0.95
(C) Di, opt = 4.7 Q0.36. μ3.2ρ0.13
(D) Di, opt = 3 Q0.36. μ0.88

Submitted By :Ali Uppal

If ‘D’ is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of__________________?

(A) D/2 or minimum 2″ to 5D
(B) D/5 or minimum 2″ to 5D
(C) D/5 or minimum 2″ to D
(D) None of these

Submitted By :Ali Uppal

In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is__________________?

(A) Called tube pitch
(B) Called tube clearance
(C) Always less than the diameter of the tube
(D) None of these

Submitted By :Ali Uppal

In hydrostatic testing of welded pipe (for leakage, strength etc.) the ratio of minimum hydrostatic test pressure to internal design pressure is around __________________?

(A) 0.5
(B) 1.5
(C) 2.5
(D) 3.5

Submitted By :Ali Uppal

Tube wall thickness depends on the corrosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than _____________ mm outside diameter is generally not recommended for fouling fluids ?

(A) 16
(B) 19
(C) 28
(D) 38

Submitted By :Ali Uppal

For a 25 mm hole drilled in plates to be riveted, the shank diameter of the rivet should be _______________ mm?

(A) 25
(B) 23
(C) 26
(D) 27

Submitted By :Ali Uppal

Previous
First
....
324
325
326
327
328
....
811
Next