Crude topping column operates at ________________ pressure?

Related Mcqs:

1. The most widely used crude topping column in refineries is the ______________ column?

   A. Bubble-cap
   B. Packed bed
   C. Fluidised bed
   D. Perforated plate

2. Sour crude means the ________________ bearing crude?

   A. Asphalt
   B. Sulphur compounds
   C. Wax
   D. Nitrogen compounds

3. During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) ________________ with increase in the amount of water?

   A. Decreases
   B. Increases
   C. Remains unchanged
   D. Decreases linearly

4. Bottom product of atmospheric pressure crude oil distillation column is termed as________________?

   A. Reduced crude
   B. Heavy ends
   C. Asphalt
   D. Residuum

5. Paraffin base crude oil as compared to asphalt base crude gives___________________?

   A. Higher yield of straight run gasoline
   B. Higher octane number gasoline
   C. Lower viscosity index lube oil
   D. Poorer yield of lube oil

6. _____________ base crude oil is also called asphaltic crude?

   A. Paraffinic
   B. Naphthenic
   C. Mixed
   D. Aromatic

7. Crude oils containing more than ____________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a ‘salty crude’ ?

   A. 1
   B. 5
   C. 15
   D. 25

8. Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about ______________ kg/cm2?

   A. 1.5
   B. 3
   C. 6
   D. 12

9. Products drawn from the top to bottom of the crude oil distillation column has progressively increasing ___________________?

   A. Boiling points
   B. Molecular weight
   C. C/H ratio
   D. All A., B. and C.

10. A typical yield of diesel in straight run distillation of crude oil may be about ________________ percent?

    A. 8
    B. 18
    C. 28
    D. 35