A. Acid
B. Solvent extraction
C. Alkali
D. Clay
Related Mcqs:
- Higher viscosity of lubricating oil usually signifies_______________________?
A. Lower Reid vapour pressure
B. Higher acid number
C. Higher flash point and fire point
D. Lower flash point and fire point - Viscosity index of a lubricating oil_________________?
A. Is the measure of its flash point
B. Is the measure of variation of viscosity with temperature
C. Should be low
D. None of these - A multigrade lubricating oil means an oil having high __________________?
A. Viscosity index
B. Viscosity
C. Aniline point
D. Flash point - Paraffins are desirable in lubricating oil, as it has got high_____________________?
A. Viscosity
B. Viscosity index
C. Smoke point
D. Pour point - ____________ is not an important refinery process for upgrading the quality of lubricating oil ?
A. Deoiling
B. Solvent refining
C. Clay treatment
D. Hydro-treatment - 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 - Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ °C ?
A. 50
B. 70
C. 90
D. 140 - Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is _______________ centistokes (or 100 Redwood I seconds) ?
A. 5
B. 25
C. 50
D. 100 - Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher ______________ compared to the dry natural gas?
A. Unsaturated hydrocarbon content
B. Calorific value
C. Quantity of propane
D. Quantity of butane - Crude oil is transported inland from oil field to refineries, mainly by the _____________________?
A. Road tankers
B. Rail tankers
C. Underground pipelines
D. None of these
