Chemical Engineering MCQs

Page No. 153

In a reversible process__________________?


a Tds = dE + dW

✓


bdE – dW = Tds

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cdW – dE = Tds

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d Tds – dW + dE >0

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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

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bB, D, E

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cA, B, E

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dA, D, E

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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

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bOpen

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cInsulated

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dClosed

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View Answer Closed

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


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

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bVibration

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cPressure gradient and the compressibility of the flowing medium

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dAll A., B. & C.

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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

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cIsotonic

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dNone of these

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View Answer Ideal

At low Reynolds number______________?


aViscous forces are unimportant

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bViscous forces control

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cViscous forces control and inertial forces are unimportant

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dGravity forces control

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Boyle’s law for gases states that____________________?


aP ∝ 1/V, when temperature is constant

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

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

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dP/V = constant, for any gas

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


aGlobe valve

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bGate valve

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cNeedle valve

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dButterfly valve

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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

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b Less

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cSame

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dData insufficient to predict

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View Answer More

Venturimeter and orificemeter measures the _____________ of the fluid?


aPressure

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bMaximum velocity

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cAverage velocity

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dPoint velocity

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View Answer Average velocity

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