Chemical Engineering MCQs

6108 MCQs  (Page 594 of 611)

Attempt Chemical Engineering Quiz
What is the ratio of adiabatic compressibility to isothermal compressibility ?
A. 1
B. < 1
C. > 1
D. >> 1
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“Dry ice” is________________?
A. Mositure free ice
B. Solid helium
C. Solid carbon dioxide
D. None of these
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Air enters an adiabatic compressor at 300K. The exit temperature for a compression ratio of 3, assuming air to be an ideal gas (Y = Cp/Cv = 7/5) and the process to be reversible, is___________________?
A. 300 × (32/7)
B. 300 × (33/5)
C. 300 × (333/7)
D. 300 × (35/7)
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A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yi is the liquid activity coefficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of ______________________?
A. Temperature only
B. Temperature and pressure only
C. Temperature, pressure and liquid composition xi only
D. Temperature, pressure, liquid composition xi and vapour composition yi
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The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are ?
A. 1
B. 2
C. 3
D. 0
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Gibbs-Duhem equation relates composition in liquid phase and the _____________ at constant temperature & pressure?
A. Fugacity
B. Partial pressure
C. Activity co-efficient
D. All (a), (b), and (c)
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Which is an example of closed system ?
A. Air compressor
B. Liquid cooling system of an automobile
C. Boiler
D. None of these
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For a reversible process involving only pressure-volume work____________________?
A. (df)t, p 0
C. (df)t, p = 0
D. (da)t, v < 0
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Work done in an adiabatic process between two states depends on the__________________?
A. Rate of heat transmission
B. Initial state only
C. End states only
D. None of these
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Fugacity and pressure are numerically not equal for the gases__________________?
A. At low temperature and high pressure
B. At standard state
C. Both a. and b
D. In ideal state
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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