Chemical Engineering Mcqs

A system is said to be at equilibrium, if the entropy of the system has reached ____________ value?

• (A)  Minimum
• (B)  Zero
• (C)  Maximum
• (D)  None of these

Answer

Submitted By :Ali Uppal

Fugacity is a measure of the____________________?

• (A)  Escaping tendencies of the same substance in different phases of a system
• (B)  Relative volatility of a mixture of two miscible liquids
• (C)  Behaviour of ideal gases
• (D)  None of these

Answer

Submitted By :Ali Uppal

Isobaric process means a constant process ?

• (A)  Temperature
• (B)  Pressure
• (C)  Volume
• (D)  Entropy

Answer

Submitted By :Ali Uppal

Rotary lime kiln is an example of a/an _____________ system?

• (A)  Closed
• (B)  Open
• (C)  Isolated
• (D)  Non-thermodynamic

Answer

Submitted By :Ali Uppal

For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system _____________ as its mole fraction increases?

• (A)  Decreases
• (B)  Increases
• (C)  Remain same
• (D)  Decreases linearly

Answer

Submitted By :Ali Uppal

Mollier chart is a _____________ plot?

• (A)  Pressure vs. enthalpy
• (B)  Pressure vs. volume
• (C)  Enthalpy vs. entropy
• (D)  Temperature vs. entropy

Answer

Submitted By :Ali Uppal

A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the _____________ mean of P1 and P2.(where, P1 and P2 are initial and final pressures respectively) ?

• (A)  Logarithmic
• (B)  Arithmetic
• (C)  Geometric
• (D)  Harmonic

Answer

Submitted By :Ali Uppal

Maximum work that could be secured by expanding the gas over a given pressure range is the _____________ work?

• (A)  Isothermal
• (B)  Adiabatic
• (C)  Isentropic
• (D)  None of these

Answer

Submitted By :Ali Uppal

What happens in a reversible adiabatic compression ?

• (A)  Heating occurs
• (B)  Cooling occurs
• (C)  Pressure is constant
• (D)  Temperature is constant

Answer

Submitted By :Ali Uppal

The equation, Cp – Cv = R, is true for _______________ gas?

• (A)  No
• (B)  Any real
• (C)  Only ideal
• (D)  Both

Answer

Submitted By :Ali Uppal