Chemical Engineering MCQs

Page No. 492

The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is ______________ stress?


aShear


bTensile


cCompressive


dThermal


View Answer Thermal

In a continuous distillation column, the optimum reflux ratio ranges from _______________ times the minimum reflux ratio?


a1.1 to 1.5


b1.6 to 2


c2.2 to 2.6


d2.7 to 3


View Answer 1.1 to 1.5

Speed of the drum of the rotary vacuum filter normally ranges from _____________ rpm?


a0.1 to 2


b5 to 7


c3 to 8


d8 to 15


View Answer 0.1 to 2

Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is ___________________?


aMore


bLess


cSame


dEither A. or B.; depends upon the I.D. of the pipe


View Answer Less

In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about _______________ cms?


a10


b20


c30


d35


View Answer 10

_____________________ tray arrangement is recommended for distillation column having diameter upto 4 ft ?


aRadial flow


bCross flow


cSplit flow


dCascade


View Answer Cross flow

In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of ________________ mm?


a3-5


b5-11


c8-15


d12-18


View Answer 5-11

The ratio of shear stress to shear strain is called ____________________?


aBulk modulus


bShear modulus


cModulus of rigidity


dModulus of elasticity


View Answer Shear modulus

A stuffing box is used for____________________?


aAbsorbing the contraction/expansion of pipeline due to temperature changes


bPrevention of fluid leakage around moving parts


cFacilitating smooth opening and closing of a valve


dReducing the resistance of fluid flow



The ends of a cylindrical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure ?


aFlat plate


bHemispherical


cTorispherical


dEllipsoidal


View Answer Ellipsoidal

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