Octane number of gasoline produced by two stage fluidised catalytic cracking process is___________________?

Related Mcqs:

1. Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as ___________________?

   A. α-methyl naphthalene
   B. 2-2-4 tri methyl pentane
   C. 1, 3 butadiene
   D. Tetra methyl ethylene

2. Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with __________________?

   A. Methyl alcohol
   B. Ethyl alcohol
   C. Methane
   D. Ethane

3. In catalytic cracking process, olefins crack ______________ times faster than in thermal cracking process?

   A. 100
   B. 200-300
   C. 1000-10000
   D. 10

4. Which of the following is used as a catalyst in fluidised bed catalytic cracking ?

   A. Silica-magnesia
   B. Silica-alumina
   C. Bentonite clays
   D. All A., B. and C.

5. Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil__________________?

   A. Gives higher yield of petrol
   B. Lower octane number of petrol
   C. Higher sulphur content in the product
   D. Higher gum forming material in petrol

6. Thermofor catalytic cracking process is a ______________ process?

   A. Fixed bed
   B. Moving bed
   C. Fluidised bed
   D. Non-catalytic

7. Octane number (unleaded) of gasoline produced by isomerisation of butane may be about __________________?

   A. 45
   B. 55
   C. 70
   D. 90

8. Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to__________________?

   A. Increase the yield of light distillates
   B. Suppress coke formation
   C. Enhance the octane number of gasoline
   D. Reduce gum content in gasoline

9. Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is ________________?

   A. More than 100
   B. Round about 100
   C. Between 50 and 100
   D. Less than 25

10. Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses _______________ as catalyst?

    A. Bauxite
    B. Fuller’s earth
    C. Activated clay
    D. All A., B. & C.