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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

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 A., B. and C.
Correct Answer: All A., B. and C.
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
Correct Answer: pd/4t
Scale up problem in design based on the similarity concept takes into account _______________ similarity?
A Geometrical
B Kinematic
C Dynamic
D All A., B. and C.
Correct Answer: All A., B. and C.
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
Correct Answer: Di, opt = 3.9 Q0.45 ρ0.13
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
Correct Answer: D/5 or minimum 2″ to 5D
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
Correct Answer: Called tube pitch
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
Correct Answer: 1.5
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
Correct Answer: 19
Stage efficiency for packed tower varies with the____________________?
A Type & size of packing
B Fluid rates and fluid properties
C Operating pressure and column diameter
D All A., B. and C.
Correct Answer: All A., B. and C.
Power required for agitation depends upon the______________________?
A Height & properties of the liquid
B Agitator type & speed of agitation
C Size of agitator & the tank
D All A., B. and C.
Correct Answer: All A., B. and C.
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