Chemical Engineering MCQs

Page No. 811

A dense structure of grinding wheel is not used for the_____________________?


aDuctile material

✓


bHard materials

✖


cBrittle materials

✖


dFinishing cuts

✖


View Answer Ductile material

If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity_________________?


aIs trebled

✖


bRemains unchanged

✓


cDecreases by a factor of 3

✖


dDecreases by a factor of 1/3

✖


View Answer Remains unchanged

Pressure required to increase the density of water by about 1% is ____________________ atmosphere?


a10

✖


b50

✖


c200

✓


d1000

✖


View Answer 200

The starting of a car takes time in winter, because the__________________?


aOctane number of fuel is decreased

✖


bFuel supply for ignition is not sufficient

✖


cVaporisation of the fuel is decreased

✓


dPour point of fuel decreases

✖



The difference between gross & net calorific values of fuel is due to the___________________?


aSensible heat carried away by the flue gases

✖


bHeat carried away by the steam from the moisture content of the fuel

✖


cHeat lost by radiation

✖


dHeat carried away by steam from the combustion of hydrogen in the fuel

✓



Speisses is a mixture of the following ?


aArsenides of heavy metals

✓


bAntimonides of heavy metals

✖


cArsenides & antimonides of heavy metals

✖


dIron, cobalt and nickel

✖



Factor of safety in machine design is defined as the ratio of ultimate stress to _____________ stress ?


aWorking

✓


bBearing

✖


cYield

✖


dNone of these

✖


View Answer Working

Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the ______________ temperature of air?


aWet bulb

✓


bDry bulb

✖


cSaturation

✖


dDew point

✖


View Answer Wet bulb

The elastic strain in copper is due to the__________________?


aMotion of dislocations

✓


bStretching of atomic bonds

✖


cBreakage of atomic bonds

✖


dNone of the above

✖



Which of the following fastening devices has a head at one end and a nut fitted to the other ?


aBolt

✖


bStud

✓


cTop bolt

✖


dNone of these

✖


View Answer Stud

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