Chemical Engineering MCQs

Page No. 823

The majority charge carriers in p-type silicon are______________________?


aFree electrons

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bIons

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cConduction electrons

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dHoles

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View Answer Holes

Quartz is a ________________ material ?


aDiamagnetic

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bFerromagnetic

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cFerroelectric

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dPiezoelectric

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View Answer Piezoelectric

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


aAdhesive

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bCohesive

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cMolecular

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dVander Walls

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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

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b1 : 2

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c2 : 1

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d1 : 4

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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

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b1000-1500

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c120-500

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d1500-3000

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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

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bEndurance

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cFatigue

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dNone of these

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View Answer Creep

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


aCalcium

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bNitrogen

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cPhosphorous

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dHydrogen

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View Answer Nitrogen

Steel is welded using the ________________ flame ?


aCarburising

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bNeutral

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cOxidising

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dAll A, B. & C

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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

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b10 and 50

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c2 and 50

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d13 and 55

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View Answer 2 and 50

Which of the following metals reacts violently with water ?


aMercury

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bSodium

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cCalcium

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dMagnesium

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View Answer Sodium

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