Chemical Engineering MCQs

Page No. 800

Wohler test is a destructive test to find out the ___________________ strength of a prepared metal specimen ?


aCreep

✖


bFatigue

✓


cEndurance

✖


dTensile

✖


View Answer Fatigue

Powder metallurgy is used to produce__________________?


aHigh precision components with complex cavities and sharp features

✖


bComponents of large size

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cPorosity free components

✓


dComponents of such alloys whose constituents do not form alloys readily

✖



Primary designation of steel is based on its__________________?


aHardness & tensile strength

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bCarbon content

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cIron content

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dAlloying elements content

✓



The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is__________________?


aMore

✓


bLess

✖


cSame

✖


dMore but less than the diameter of bolt

✖


View Answer More

Moist climate is the most favourable factor in the site selection far a_________________?


aSteel plant

✖


bTextile factory

✓


cPetroleum refinery

✖


dCoke oven battery

✖


View Answer Textile factory

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the___________________?


aRetained austenite

✖


bMartensite formation

✓


cRelatively high sulphur content in the base metal

✖


dSufficient hydrogen present in the welding arc

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View Answer Martensite formation

Which of the following forces does not act on a fluid at rest ?


aViscous force

✓


bGravity force

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cHydrostatic force

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dSurface tension force

✖


View Answer Viscous force

On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the ______________ of the input signal?


aFrequency

✓


bAmplitude

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cDamping

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dNone of these

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View Answer Frequency

In connection with corrosion of metals, passivation is the process that__________________?


aIntensifies deterioration

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bChanges the composition of the metal

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cInhibits further deterioration

✓


dNone of these

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Tempering of a material does not improve its____________________?


aMachinability

✓


bToughness

✖


cInternal stress level

✖


dSoftness

✖


View Answer Machinability

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