1. What is the best way to prevent load on the dust collectors in the fluidized bed reactor?
a) Up flow beds
b) Down flow beds
c) Side flow beds
d) None of the mentioned
Explanation: Prevent the dust to reach the dust collectors by flowing them downwards.
2. Efficiency in fluidized bed for any process is the highest when compared with any other beds, true or false?
a) true
b) false
Explanation: The presence of distributor makes it the most efficient bed than other beds.
3. Which bed shown below, can provide with remarkable temperature uniformity for highly exothermic and temperature sensitive reactions?
a) Fluidized bed reactor
b) Spouted bed
c) Teeter bed
d) Batch reactor
Explanation: In fluidized bed, the air passing through the distributor, distributes the air throughout the reactor which indeed helps in uniform distribution of temperature.
4. Mention few processes where the solids circulation principle, developed for the FCC process has been used?
a) In fluid hydro-forming for re-forming naphtha vapour
b) Fluid coking for the treatment of heavy oil
c) Sand cracking for thermal cracking
d) All of the mentioned
Explanation: All the above processes use solid circulation principle.
5. In drying processes, how important is the inclusion of fluidized bed?
a) Most efficient drying
b) Somewhat better than spouted bed and less than teeter bed
c) Drying is best all the beds
d) Least efficient drying
Explanation: Presence of distributor helps in proper distribution steam hence better drying.
6. In fluid catalytic cracking(FCC) process, how does the heavy hydrocarbon crack into lower molecular compounds?
a) On contact with catalyst
b) By heating at high temperature
c) By pyrolysis process
d) None of the mentioned
Explanation: Heavy hydrocarbons crack when they come in contact with catalyst.
7. In fluid catalytic cracking process, cracking of heavy hydrocarbons into lower hydrocarbons, is an endothermic process, true of false?
a) true
b) false
Explanation: Since cracking utilizes more energy for cracking heavy hydrocarbons
8. After the process, the catalyst gets deactivated, how it can ge regenerated?
a) Burning off the carbon in air
b) Replacing the catalyst
c) Using brine solution
d) Using Sulphuric acid
Explanation: Carbon which gets adsorbed on the catalyst has to be burnt off.
9. What are the two sections of the fluid catalytic cracking process?
a) Reactor and Regenerator
b) Plug flow reactor and tubular reactor
c) Batch reactor and tubular reactor
d) Batch reactor and heat exchanger
Explanation: Reactor is used for cracking process and regenerator for regeneration of catalyst.
10. How is the circulation regulated between the reactor and regenerator in FCC?
a) Plug valves
b) Slide valves
c) Gate valves
d) Piston valves
Explanation: Undergoes less erosion than other valves.