Explore topic-wise MCQs in Chemical Engineering.

This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

If Da is diffusivity, CT is tracer concentration and UT is overall heat transfer coefficient, then the pulse tracer balance with dispersion is obtained as ____

A. \(\frac{∂^2 C_T}{∂z^2} – \frac{∂U_T}{∂z} = \frac{∂C_T}{∂z} \)
B. Da\(\frac{∂^2 C_T}{∂z^2} – \frac{∂U_T}{∂z} =\frac{∂C_T}{∂z} \)
C. Da\(\frac{∂^2 C_T}{∂z^2} + \frac{∂U_T}{∂z} =\frac{∂C_T}{∂z} \)
D. Da\(\frac{∂C_T}{∂z^2} – \frac{∂U_T}{∂z} =\frac{∂C_T}{∂z} \)
Answer» B. Da\(\frac{∂^2 C_T}{∂z^2} – \frac{∂U_T}{∂z} =\frac{∂C_T}{∂z} \)
Discussion
2.

The the species continuity equation for the axial dispersion model is ____a) u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)Cb) u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + Cc) \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)Cd) u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (r

A. u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)C
B. u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + C
C. \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)C
D. u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)
Answer» B. u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + C
Discussion
3.

Which of the following represents Dispersion number? (Where D is the fluid dispersion coefficient,L is the length of spread of tracer and u is the fluid velocity)

A. \(\frac{L}{uD} \)
B. \(\frac{L}{D} \)
C. \(\frac{D}{uL} \)
D. \(\frac{Lu}{D} \)
Answer» D. \(\frac{Lu}{D} \)
Discussion