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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

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.
Which of the following is the best tube material from thermal conductivity point of view alone ?
A Aluminium
B Stainless steel
C Copper
D Carbon steel
Correct Answer: Copper
The LMTD correction factor (FT) is defined as the __________________?
A Ratio of true temperature difference to the LMTD
B Ratio of LMTD to the true temperature difference
C Differenced of true temperature difference and the LMTD
D Geometric mean of the true temperature difference and the LMTD
Correct Answer: Ratio of true temperature difference to the LMTD
Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than ______________ of the head?
A 6% of I.D.
B 3 times the thickness
C Either A. or B., whichever is larger
D Either A. or B., whichever is smaller
Correct Answer: Either A. or B., whichever is larger
In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ _____________ cms?
A 1.2
B 0.5
C 3.8
D 6.8
Correct Answer: 3.8
Pick out the wrong statement pertaining to shell and tube heat exchanger_______________?
A Clearance between shell & baffles and between tube & baffles should be minimum to avoid
B Baffles are supported independently of the tubes by tie rods and positioned by spacers
C Tie rods are fixed at one end in the tube sheet by making blind holes and the minimum
D Bracket supports are used for horizontal shell, while saddle support is used for vertical shell
Correct Answer: Bracket supports are used for horizontal shell, while saddle support is used for vertical shell
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the_______________?
A Liquid gradient on the tray
B Lower skirt clearance
C Lower static submergence
D Small downcomer liquid seal
Correct Answer: Liquid gradient on the tray
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