A. Reduced crude
B. Heavy ends
C. Asphalt
D. Residuum
Related Mcqs:
- 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. - 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 - 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 terminology used for the bottom most product from the vacuum crude distillation unit is______________?
A. Residual crude
B. Residuum
C. Reduced crude
D. Petrolatum - In the atmospheric pressure crude distillation, the content of _____________ from lighter fraction to heavier ones?
A. Sulphur increases
B. Sulphur decreases
C. Nitrogen decreases
D. None of these - 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 - _____________ base crude oil is also called asphaltic crude?
A. Paraffinic
B. Naphthenic
C. Mixed
D. Aromatic - 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 - The most widely used crude topping column in refineries is the ______________ column?
A. Bubble-cap
B. Packed bed
C. Fluidised bed
D. Perforated plate - 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
