Chemical Engineering MCQs

Page No. 840

The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then_________________?


aWet bulb temperature=dry bulb temperature


bWet bulb temperature=dew point temperature


cSaturation temperature=dew point temperature


dAll ‘A’, ‘B’ & ‘C’



Addition of silicon to cast iron ___________________?


aPromotes graphite module formation


bImproves its ductility


cDoes not promote graphite flakes formation


dIncreases the fluidity of molten metal



______________________ is used as a material of construction for the blade of power saw ?


aWrought iron


bStainless steel


cMild steel


dHigh speed steel


View Answer High speed steel

The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the____________________?


aAbility to absorb shock


bCapacity to store energy


cRatio of the wire & coil diameters


dLoad to produce unit deflection



Which of the following is not the function of a volute casing provided in a centrifugal pump ?


aTo reduce the head loss in discharge


bTo increase the pump efficiency


cTo collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity


dTo increase the pump discharge rate



Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails ?


aBelow the yield point


bAbove the yield point


cBelow the elastic limit


dAt the elastic limit


View Answer Below the yield point

Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is ___________________?


aMalleable iron


bGrey cast iron


cChilled cast iron


dWhite cast iron


View Answer Malleable iron

The most serious manufacturing defect from fracture toughness point of view is____________________?


aSurface roughness


bPores


cSpherical inclusion


dCrack


View Answer Crack

______________ has the highest melting point out of the following ?


aTungsten


bZirconium


cMolybdenum


dTantalum


View Answer Tungsten

In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material ?


aTin


bLead


cZinc


dGlass


View Answer Glass

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