BE/B Eng Bachelor of Engineering Bachelor of Chemical Engineering 3

Question 1

The Gibbs phase rule (F = C - P + 2) determines which of the following?

Accepted Answer

Degrees of freedom in a multiphase system

Answer

The Gibbs phase rule gives the degrees of freedom F (independent intensive variables) for a system with C components and P phases.

Question 2

Which mass transfer operation is best suited to separate a dissolved solid from a liquid solution based on solubility differences at different temperatures?

Accepted Answer

Crystallization

Answer

Crystallization exploits the temperature dependence of solubility to selectively precipitate a dissolved solid from solution.

Question 3

In a CSTR (Continuous Stirred Tank Reactor) at steady state, which assumption is always made?

Accepted Answer

Concentration is uniform throughout the reactor volume

Answer

A CSTR assumes perfect mixing, so the concentration and temperature inside are uniform and equal to the exit stream values.

Question 4

Raoult's law is applicable to which type of liquid mixture?

Accepted Answer

Ideal mixtures where component interactions are similar

Answer

Raoult's law (pᵢ = xᵢPᵢ*) applies to ideal solutions where all molecules interact with similar forces regardless of composition.

Question 5

What does the Fanning friction factor measure in pipe flow?

Accepted Answer

Ratio of wall shear stress to kinetic energy per unit volume

Answer

The Fanning friction factor is defined as the ratio of wall shear stress to the fluid's kinetic energy per unit volume (τ_w / (½ρv²)).

BE/B Eng Bachelor of Engineering Practice Test

BE/B Eng Bachelor of Engineering Practice Test

BE/B Eng Bachelor of Engineering Bachelor of Chemical Engineering 3