Chemical Engineering MCQs

Page No. 788

The product of a commercial direct reduction process is___________________?


aLiquid iron

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bSolid iron

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cSponge iron

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dIron saturated with carbon

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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

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b9.81

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c10.88

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d0.95

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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

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bIncreases & increases

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cIncreases & decreases

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dDecreases & decreases

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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

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bHot starting

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cSpark plug fouling

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dAll A, B & C

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View Answer Spark plug fouling

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


aBlades of gas turbine

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bPiston of an I. C. engine

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cFlywheel of steam engine

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dCycle chain

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View Answer Blades of gas turbine

Fine grained steels have____________________?


aHigh brittleness

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bHigher tendency to distort

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cHigh ductility

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dNone of these

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View Answer High ductility

If Reynolds number is greater than 1, then the_____________________?


aViscous force is larger than the inertia force

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bInertia force is larger than the viscous force

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cInertia force is larger than the surface tension force

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dInertia force is larger than the gravitational force

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Normalising of an object does not________________________?


aRefine coarse grain structure obtained during hot working

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bImprove ductility

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cImprove yield strength

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dImprove mechanical properties

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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

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b85

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c60

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d45

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View Answer 85

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


aSame

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bSlightly less

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cSlightly more

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dMuch more

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View Answer Slightly more

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