Chemical Engineering MCQs

Page No. 842

Lap joints are preferred over butt joints in soldering/brazing, because these joints are _________________?


aWeaker in tension but stronger in shear


bWeaker in shear but stronger in tension


cStronger in both shear and tension


dThe lap joints are easily made



Water flow in the river during flood can be categorized as the _________________ flow ?


aUnsteady uniform


bUnsteady non-uniform


cSteady uniform


dSteady non-uniform


View Answer Unsteady non-uniform

Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils ?


aElaiden test


bReichert-Meissl value test


cHunter value test


dIodine value test


View Answer Elaiden test

Laser welding is widely employed in the __________________ industries ?


aElectronic


bStructural


cProcess


dHeavy


View Answer Electronic

Joining of thin foils is preferred to be done by _____________________?


aGamma rays


bX-rays


cMicrowaves


dGas welding


View Answer Microwaves

About _________________ ton of coke is required in a cupola to produce one ton of casting ?


a0.03


b0.3


c0.8


d1.5


View Answer 0.3

Satellites burn off during re-entry to earth’s atmosphere, because of the ____________________?


aCombustion with air


bGravitational pull by earth


cFriction with earth’s atmosphere


dLoss in weight of the satellite



Filler material used in welding should have _________________ as compared to the parent metal to be welded ?


aLower melting temperature


bSame melting temperature


cSame composition


dBoth ‘B’ & ‘C’



The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process ?


aCyaniding


bSherardizing


cSpheroidising


dNone of these


View Answer Cyaniding

With increase in temperature, the electrical conductivity of semiconductors_____________________?


aIncreases


bDecreases


cRemain constant


dEither A. or B. depends on the type of semi-conductor


View Answer Increases

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