Chemical Engineering MCQs

Page No. 139

Degree of freedom of the system ice-water-vapour will be ________________?


a0

✓


b 1

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c2

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d 3

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View Answer 0

How many molecules per unit cell are there in a face centred cubic lattice ?


a2

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b4

✓


c6

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d8

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View Answer 4

‘Semi steel’ is__________________?


aProduced by adding 10-20% steel to the cupola charge

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bStronger than cast iron

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cBoth A. and B.

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dNeither A. nor B.

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View Answer Both A. and B.

Which one occupies the lowermost position in the electromotive series of metals ?


aAluminium

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bNoble metals (Ag, Pt, Au)

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cZinc

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dAlkali metals (K, Na, Li)

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If we increase the pressure on a substance (which is at its triple point), then the triple point __________________?


aIncreases

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bDecreases

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cRemains unchanged

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dMay increase or decrease; depends on the substance

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View Answer Remains unchanged

Ferric stainless steels compared to austenitic stainless steels________________?


aHave lower corrosion resistance

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bAre harder to fabricate

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cAre less ductile and hence less suitable for cold pressing

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dAll A., B. and C.

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View Answer All A., B. and C.

Reduction in the grain size reduces the _______________ of the material?


aFatigue resistance

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bTensile strength

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cCreep resistance

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dAll A., B. & C.

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View Answer Creep resistance

Heating of water under atmospheric pressure is an ______________ process?


aIsochoric

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b Isobaric

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cAdiabatic

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d Isothermal

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View Answer Isobaric

______________ iron is produced, when molten pig iron is allowed to cool gradually?


aWhite cast

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bGrey cast

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cWrought

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dNone of these

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View Answer Grey cast

Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with__________________?


aAcidic refractory

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bRubber

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cKarbate

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dLead or acid-proof bricks

✓



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