Chemical Engineering MCQs

6108 MCQs  (Page 20 of 611)

Attempt Chemical Engineering Quiz
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to____________________?
A. Time
B. Square root of time
C. Square of time
D. Cube of time
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Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about___________________?
A. 1
B. 10
C. 25
D. 50
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____________________ flux is used for the extraction of metal from its self fluxing ores?
A. No
B. Acid
C. Basic
D. Neutral
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Uniform ramming of sand in green sand moulding process leads to____________________?
A. Reduced chance of gas porosity
B. Greater dimensional stability of the casting
C. Uniform flow of molten metal into the mould cavity
D. Less sand expansion type of casting defect
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At the point of boundary layer separation in fluid flow, the _____________________?
A. Shear stress is maximum
B. Velocity gradient is flat
C. Density variation is maximum
D. Shear stress is zero
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In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is__________________?
A. More
B. Less
C. Equal
D. Much more
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________________ property of steel increases by addition of large amount of silicon in it?
A. Mechanical
B. Machining
C. Magnetic
D. Refractory
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When the wavelength of incident X-rays increases, the angle of diffraction__________________?
A. Decreases
B. Increases
C. Remain constant
D. Shows no systematic variation
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Liquid nitrogen containers can be made from ___________________?
A. Ferritic stainless steel
B. Hsla steel
C. Titanium
D. Austenitic stainless steel
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To counteract the bad effects of strain hardening on a cold formed part, it must be ______________________?
A. Tempered
B. Normalised
C. Annealed
D. Hardened
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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