Cracking is___________________?

Related Mcqs:

1. 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

2. 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

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

   A. 80
   B. 87
   C. 92
   D. 97

5. In catalytic cracking, the___________________?

   A. Gasoline obtained has a very low octane number
   B. Pressure & temperature is very high
   C. Gasoline obtained has very high aromatic content
   D. Gasoline obtained has very high amount of gum forming compounds

6. Thermofor catalytic cracking process is a ______________ process?

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

7. The main aim of cracking is to produce ____________________?

   A. Gasoline
   B. Lube oil
   C. Petrolatum
   D. Coke

8. 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.

9. The catalytic cracking of heavier petroleum fraction is done to produce mainly____________________?

   A. Gasoline
   B. Asphalt
   C. Diesel oil
   D. Tar

10. Catalyst used in the catalytic cracking is_____________________?

    A. Silica-alumina
    B. Silica gel
    C. Vanadium pentoxide
    D. Nickel