Fluidization Engineering Questions on “Transportation and mixing of fine powder”.
1. What is the maximum range of inclination, in the Fuller Huron air slide conveyor?
a) 1-3 degrees
b) 3-6 degrees
c) 6-9 degrees
d) 9-12 degrees
Answer: b
Clarification: 3-6 degrees is the optimum range which is required for transportation.
2. What is the application of the process mentioned in below fig?
a) Transportation
b) Mixing
c) Reaction
d) Segregation
Answer: a
Clarification: Fuller Air slide principle is used for transportation.
3. In below fig, how is the mixing of powdered particles taking place?
a) Water
b) Air
c) Steam
d) None of the mentioned
Answer: b
Clarification: Air is used for developing the fluidized condition inside the mixer.
4. From above fig, if the inlet and outlet of solids are interchanged how would it impact the process?
a) No effect on the process
b) Practically not possible
c) Will require pumps
d) Leads to entrainment of solids by increasing air flow rate
Answer: d
Clarification: Leads to loss of solid particles which is not desirable.
5. From above fig, if the solids inlet is interchanged with air inlet how would it impact the process?
a) Increases the load on the pumps
b) Difficulty for solids outlet
c) No proper mixing
d) All of the mentioned
Answer: d
Clarification: All the problems will be encountered if that’s the case.
6. What is the best way for reducing load on cyclone separators in the fluidized mixer for powdery material?
a) Using multiple cyclones
b) Increasing the gas flow rate
c) Increasing the solids mass rate
d) None of the mentioned
Answer: a
Clarification: Using of multiple cyclones will reduce load on them but at the same time its costly.
7. What is the latest technology being used for transportation of solid particles in cement industries?
a) Pneumatic fluidized transportation
b) Conveyor belts
c) Buckets
d) Trucks
Answer: a
Clarification: Because it is cheaper than other transportation means.
8. Among the following processes which provides the most economic means in cement industry?
a) Fluidization process
b) Mixing process with agitator
c) Batch Reactor
d) All of the mentioned
Answer: a
Clarification: It helps in reduction of cost and power.
9. Transportation through fluidization using more power than any other process, true or false?
a) True
b) False
Answer: b
Clarification: Its the opposite, it uses least power.
10. What happens if the inclination is more than 3-6 degrees in the fuller Huron conveyor?
a) Difficulty in laying transportation lines
b) Faster transportation
c) Slows down the transportation
d) Has no effect
Answer: a
Clarification: Creates problem while laying transportation lines on a larger scale.