Chemical Engineering MCQs

Page No. 143

With increase in the carbon percentage in the steel, its__________________?


aHardness increases

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bDuctility reduces

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cTensile strength increases

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dAll A., B. and C.

✓


View Answer All A., B. and C.

The temperature at the eutectic point of the system is the _____________ temperature that can be attained in the system?


a Lowest

✓


b Highest

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cAverage

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d None of these

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View Answer Lowest

Which of the following has the least value of ultimate tensile strength (UTS) ?


aMedium carbon steel

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bHigh carbon steel

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cCast iron

✓


dWrought iron

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View Answer Cast iron

To improve the machinability of steel by its softening, it is subjected to __________________?


aCold working

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bAnnealing

✓


cShot blasting

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dHeating

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View Answer Annealing

Bog iron used for the adsorption of H2S from coke oven gas is___________________?


aIron impregnated with resin (usually Bakelite)

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bCarbon free iron

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cNone of these

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dAn intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)

✓



For an ideal gas, the internal energy depends upon its ____________ only?


aMolecular size

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bTemperature

✓


cVolume

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d Pressure

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View Answer Temperature

The specific gravity of coal depends mainly on its ______________ content?


aCarbon

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bVolatile matter

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cAsh

✓


dMoisture

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View Answer Ash

The expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?


a With pressure changes at constant temperature

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bUnder reversible isothermal volume change

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c During heating of an ideal gas

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dDuring cooling of an ideal gas

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Bell metal is an alloy of __________________?


aCopper & zinc

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bCopper & tin

✓


cCopper & nickel

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dZinc & tin

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View Answer Copper & tin

Hastelloy C is a good material of construction in chemical process industry, since it is ___________________?


aHighly corrosion resistant and is readily fabricated

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bRelatively inexpensive although it can be fabricated with some difficulty

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cCorrosion resistant to most alkalis, particularly because of its copper content

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dLight and resists attack by acids

✓



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