A. 1.2
B. 12
C. 120
D. 700
Related Mcqs:
- Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about _______________ mm Hg (absolute)?
A. 5-10
B. 30-80
C. 150-250
D. 350-400 - Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about ________________ mm Hg absolute?
A. 1 to 5
B. 30 to 80
C. 250 to 350
D. 450 to 500 - The terminology used for the bottom most product from the vacuum crude distillation unit is______________?
A. Residual crude
B. Residuum
C. Reduced crude
D. Petrolatum - 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 - Crude oil is subjected to vacuum distillation in the last stage, because_________________?
A. High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may
decompose
B. Lighter/low boiling products are prone to thermal decomposition
C. High purity products can be obtained thereby
D. None of these - 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 - The main use of heavy gas oil produced by the vacuum distillation unit is as a_____________________?
A. Blending component for kerosene
B. Blending component for petrol
C. Feedstock for fluid catalytic cracking unit
D. None of these - Naphtha yield in straight run distillation of crude oil may be about _______________ percent?
A. 2
B. 6
C. 12
D. 18 - 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 - _____________ base crude oil is also called asphaltic crude?
A. Paraffinic
B. Naphthenic
C. Mixed
D. Aromatic
