Chemical Engineering MCQs

Page No. 143

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


aHardness increases


bDuctility reduces


cTensile strength increases


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


cAverage


d None of these


View Answer Lowest

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


aMedium carbon steel


bHigh carbon steel


cCast iron


dWrought iron


View Answer Cast iron

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


aCold working


bAnnealing


cShot blasting


dHeating


View Answer Annealing

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


aIron impregnated with resin (usually Bakelite)


bCarbon free iron


cNone of these


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


bTemperature


cVolume


d Pressure


View Answer Temperature

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


aCarbon


bVolatile matter


cAsh


dMoisture


View Answer Ash

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


a With pressure changes at constant temperature


bUnder reversible isothermal volume change


c During heating of an ideal gas


dDuring cooling of an ideal gas



Bell metal is an alloy of __________________?


aCopper & zinc


bCopper & tin


cCopper & nickel


dZinc & tin


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


bRelatively inexpensive although it can be fabricated with some difficulty


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


dLight and resists attack by acids



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