Chemical Engineering MCQs

Page No. 788

The product of a commercial direct reduction process is___________________?


aLiquid iron


bSolid iron


cSponge iron


dIron saturated with carbon


View Answer Sponge iron

A 2 kg object weighs 1.8 kgf on a spring balance. The value of ‘g’ at that location in m/sec2 is___________________?


a8.82


b9.81


c10.88


d0.95


View Answer 8.82

When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively____________________?


aDecreases & increases


bIncreases & increases


cIncreases & decreases


dDecreases & decreases


View Answer Decreases & increases

Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used ?


aVapour locking


bHot starting


cSpark plug fouling


dAll A, B & C


View Answer Spark plug fouling

Consideration of the creep is the most important in case of the_____________________?


aBlades of gas turbine


bPiston of an I. C. engine


cFlywheel of steam engine


dCycle chain


View Answer Blades of gas turbine

Fine grained steels have____________________?


aHigh brittleness


bHigher tendency to distort


cHigh ductility


dNone of these


View Answer High ductility

If Reynolds number is greater than 1, then the_____________________?


aViscous force is larger than the inertia force


bInertia force is larger than the viscous force


cInertia force is larger than the surface tension force


dInertia force is larger than the gravitational force



Normalising of an object does not________________________?


aRefine coarse grain structure obtained during hot working


bImprove ductility


cImprove yield strength


dImprove mechanical properties


View Answer Improve ductility

As per international norms, the maximum permissible value of noise level in the industrial environment is _____________ decibels as measured at a distance of 1.5 meters from the source of noise?


a110


b85


c60


d45


View Answer 85

The delivery pressure of boiler feed water pump compared to the boiler steam pressure is___________________?


aSame


bSlightly less


cSlightly more


dMuch more


View Answer Slightly more

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