Chemical Engineering MCQs

Page No. 823

The majority charge carriers in p-type silicon are______________________?


aFree electrons


bIons


cConduction electrons


dHoles


View Answer Holes

Quartz is a ________________ material ?


aDiamagnetic


bFerromagnetic


cFerroelectric


dPiezoelectric


View Answer Piezoelectric

Force between the molecules of the same substance is called ______________________ force?


aAdhesive


bCohesive


cMolecular


dVander Walls


View Answer Cohesive

Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of__________________?


a1 : 1


b1 : 2


c2 : 1


d1 : 4


View Answer 1 : 1

Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of _______________ gms of zinc per m2 of steel strip ?


a5-10


b1000-1500


c120-500


d1500-3000


View Answer 120-500

The highest stress that a material can withstand for a specified length of time without excessive deformation is called the ____________ strength ?


aCreep


bEndurance


cFatigue


dNone of these


View Answer Creep

________________ is a special constituent of chlorophyll without which photosynthesis is not possible ?


aCalcium


bNitrogen


cPhosphorous


dHydrogen


View Answer Nitrogen

Steel is welded using the ________________ flame ?


aCarburising


bNeutral


cOxidising


dAll A, B. & C


View Answer Neutral

The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively __________________?


a7 and 30


b10 and 50


c2 and 50


d13 and 55


View Answer 2 and 50

Which of the following metals reacts violently with water ?


aMercury


bSodium


cCalcium


dMagnesium


View Answer Sodium

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