Chemical Engineering MCQs

Page No. 796

While the bin cards are used in the effective stores management, the queuing theory is associated with the _______________ time ?


aWaiting


bIdle


cInspection


dTool replacement


View Answer Waiting

______________________ iron is produced by the annealing of white cast iron?


aMalleable


bNodular


cDuctile


dGrey


View Answer Malleable

With increase in impurities in metals, their corrosion resistances____________________?


aIncrease


bDecrease


cRemain same


dMay increase or decrease; depending on the type of metal


View Answer Decrease

In the blast furnace, incorporation of water vapour in the blast gives the following effect ?


aIncreases the reducing potential of the gas


bIncreases the flame temperature


cNo significant change occurs


dIncreases the hydrogen content in the metal



The product out from a cupola is called ____________________?


aWrought iron


bPig iron


cCast iron


dNone of these


View Answer Cast iron

The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the ‘Curie temperature’. Its value for cobalt is ______________ °C?


a768


b1127


c1359


d1480


View Answer 1127

Super conduction in metals is observed at a temperature of ________________ °K?


a<100


b>100


cAbout 273


dAbout 373


View Answer >100

Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an ______________ body?


aGrey


bBlack


cOpaque


dWhite


View Answer Grey

Which of the following is the largest quantum of pressure ?


a1 kg/cm2


b1 bar


c1 atmosphere


d1 kilo Pascal


View Answer 1 atmosphere

Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at________________?


aHigh vacuum


bZero pressure


c0°K


dEarth’s centre


View Answer Zero pressure

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