Chemical Engineering MCQs

Page No. 762

A material subjected ________________ must have high resilience?


aShock loading

✓


bVibration

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cFatigue

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dTension

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View Answer Shock loading

A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place_________________?


aThe better insulation material should be put just next to pipe (i.e., inside)

✓


bThe better insulating material should be put outside

✖


cEither of the insulating material could be put on either side

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dSteam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe)

✖



Lead is added to 60:40 brass primarily to improve_________________?


aMachinability

✓


bCorrosion resistance

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cFluidity

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dStrength

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View Answer Machinability

Glass reacts with___________________?


aH2SO3

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bHF

✓


cHNO3

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dK2Cr2O7

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View Answer HF

Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of________________?


aSteel

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bGlass wood

✓


cCopper

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dFireclay bricks

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View Answer Glass wood

Which one can be directly solidified from gaseous state without entering into liquid state ?


aHelium

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bOxygen

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cCarbon dioxide

✓


dNone of these

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View Answer Carbon dioxide

Cold heading or upsetting is categorised as the ________________ process ?


aExtrusion

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bBending

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cRolling

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dForging

✓


View Answer Forging

The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be________________?


a3171Pa

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b3567Pa

✓


c1.01 × 105Pa

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d5000Pa

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View Answer 3567Pa

The most abundant metal present in the earth’s crust is__________________?


aIron

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bCopper

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cTitanium

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dAluminium

✓


View Answer Aluminium

A material being tested for endurance strength is subjected to the _______________ load ?


aImpact

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bCompletely reversed

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cDynamic

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dStatic & dynamic

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View Answer Completely reversed

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