A. Asphalt
B. Sulphur compounds
C. Wax
D. Nitrogen compounds
Related Mcqs:
- 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 - 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 - 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 - Crude topping column operates at ________________ pressure?
A. Atmospheric
B. 10 atm
C. Vacuum
D. 3 atm - A typical yield of diesel in straight run distillation of crude oil may be about ________________ percent?
A. 8
B. 18
C. 28
D. 35 - The characterisation factor of a crude oil is calculated as 12.5. It means that; it is________________?
A. Paraffinic
B. Naphthenic
C. Intermediate
D. None of these - 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 pressure (kg/cm2) and temperature (°C) maintained in electrical desalters for crude oil are respectively__________________?
A. 10 and 120
B. 1 and 200
C. 50 and 250
D. 10 and 300 - 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
