250+ TOP MCQs on Entrainment at or Above the TDH-Single Size of Solids and Answers

Fluidization Engineering Question Bank on “Entrainment at or Above the TDH-Single Size of Solids”.

1. Which is the best form to describe TDH?
a) Transport disengaging height
b) Total diameter height
c) Total diameter holdup
d) None of the mentioned
Answer: a
Clarification: Specific term used to describe extra height above the bed.

2. How to distinguish between Entrainment and Elutrition?
a) Based on segregation of particles
b) Based on velocity of gas
c) Based on height of reactor
d) All of the mentioned
Answer: a
Clarification: Entrainment leads to removal of all particles and Entrainment leads to removal of specific particles.

3. At what velocity entrainment of particles in the fluidized bed takes place?
a) At minimum fluidization velocity
b) At terminal velocity
c) More than terminal velocity
d) At superficial velocity
Answer: c
Clarification: At terminal velocity entrainment starts, when velocity is more than terminal velocity complete entrainment takes place.

4. Which investigator worked on elutrition of two components in batch operation?
a) Leva
b) Zenz and Weil
c) Lewis and Lang
d) Sanari and Kunii
Answer: a
Clarification: From table of ‘experimental conditions of fines’.

5. Which investigator worked on elutrition of FCC catalyst in batch operation?
a) Leva
b) Zenz and Weil
c) Lewis and Lang
d) Sanari and Kunii
Answer: b
Clarification: From table of ‘experimental conditions of fines’.

6. Which investigator worked on elutrition of one components in batch operation?
a) Leva
b) Zenz and Weil
c) Lewis and Lang
d) Sanari and Kunii