A. Heating
B. Cooling
C. Solvent extraction
D. Both B. & C.
Related Mcqs:
- Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl isobutyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the____________________?
A. Elimination of solvent drying facility
B. Higher nitration temperature
C. Lower solvent dilution ratio
D. All A., B. & C. - Deoiling is the process of removal of oil from wax. It is done by the _______________ process?
A. Solvent extraction
B. Sweating
C. Resettling
D. All A., B. & C. - An upper limit of oil content is limited to about ______________ percent for achieving efficient and satisfactory level of wax sweating?
A. 5
B. 15
C. 40
D. 60 - Both asphalt and wax are produced by ______________ base crude oils?
A. Naphthenic
B. Asphalt
C. Paraffin
D. Mixed - Testing of the knocking characteristics of petrofuels is done in a _________________ engine ?
A. Carnot
B. CFR (Co-operative fuel research)
C. Stirling
D. Diesel - The colour of gasoline is an indication of its _________________?
A. Octane number
B. Lead susceptibility
C. Gum forming tendency & thoroughness of refining
D. None of these - Specific gravity of a petroleum product gives an indication of its _________________?
A. Degree of refinement
B. Hydrocarbon content type (aromatic or paraffinic)
C. Ease of atomisation
D. Sulphur content - Pyrolysis of kerosene or natural gasoline is done to produce mainly the___________________?
A. Olefins and aromatics
B. Lighter paraffins
C. Stabilised gasoline
D. Diesel - ________________ treatment is done for appreciable improvement in viscosity index of lubricating oil?
A. Acid
B. Solvent extraction
C. Alkali
D. Clay - Complete removal of _____________ from gasoline is done by Unisol process using caustic soda and methyl alcohol?
A. Waxes
B. Mercaptans
C. Asphalt
D. Diolefins
