Chemical Engineering MCQs

Page No. 153

In a reversible process__________________?


a Tds = dE + dW


bdE – dW = Tds


cdW – dE = Tds


d Tds – dW + dE >0


View Answer Tds = dE + dW

Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?


aA, C, D


bB, D, E


cA, B, E


dA, D, E


View Answer A, B, E

A system in which there is exchange of energy but not of mass, is called a/an ____________ system?


a Isolated


bOpen


cInsulated


dClosed


View Answer Closed

Transition from laminar flow to turbulent flow is aided by the__________________?


aSurface roughness and curvature (i.e. sharp corners)


bVibration


cPressure gradient and the compressibility of the flowing medium


dAll A., B. & C.


View Answer All A., B. & C.

Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called ____________ solutions?


aIdeal


bReal


cIsotonic


dNone of these


View Answer Ideal

At low Reynolds number______________?


aViscous forces are unimportant


bViscous forces control


cViscous forces control and inertial forces are unimportant


dGravity forces control



Boyle’s law for gases states that____________________?


aP ∝ 1/V, when temperature is constant


bP ∝ 1/V, when temperature & mass of the gas remain constant


cP ∝ V, at constant temperature & mass of the gas


dP/V = constant, for any gas



Which of the following valves will incur maximum pressure drop for the same discharge of water ?


aGlobe valve


bGate valve


cNeedle valve


dButterfly valve


View Answer Needle valve

The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be _______________?


aMore


b Less


cSame


dData insufficient to predict


View Answer More

Venturimeter and orificemeter measures the _____________ of the fluid?


aPressure


bMaximum velocity


cAverage velocity


dPoint velocity


View Answer Average velocity

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