Chemical Engineering MCQs

Page No. 146

Internal energy of an element at 1 atm and 25° C is ____________ kcal/kg.mole?


a0


b273


c25


d None Of These


View Answer 0

Spark plugs are made of______________________?


aHigh alumina ceramic


bMetallic carbides


cCorundum


dCarborundum


View Answer High alumina ceramic

In cold working of metal as compared to its hot working____________________?


aCracks and blow holes are eliminated


bDuctility and impact strength improves


cAppreciable strain hardening is produced


dYield stress, hardness and fatigue strength is not at all affected



The softest material just next to talc in the Mho’s scale is___________________?


aQuartz


bGypsum


cFeldspar


dFluorite


View Answer Gypsum

“Law of corresponding states” says that___________________?


aTwo different gases behave similarly, if their reduced properties (i.e. P, V and T) are same


bThe surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature


c No gas can be liquefied above the critical temperature, howsoever high the pressure may be.


dThe molar heat of energy of gas at constant volume should be nearly constant (about 3 calories)



‘Age hardening’ of duralumin is due to____________________?


aCopper


bMagnesium


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Which of the following comprises of hydrocarbons ?


aMica flakes


bGlass


cRubber


dNone of these


View Answer Rubber

Alinco, which is a aluminium-cobalt-nickel steel, is used for making __________________?


aSurgical instruments


bPowerful magnets


cChemical equipments


dBoiler tubes


View Answer Powerful magnets

Containers made of high silicon cast iron (14% Si) are not suitable for the storage of ____________________?


aAcetic acid


bBenzoic & boric acids


cPhosphoric acid (95%) & sulphuric acid (95%)


dHydrochloric acid (concentrated)



What is the value of Joule-Thomson co-efficient for an ideal gas ?


a +ve


b-ve


c0


d


View Answer 0

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