Deoiling of wax is done by its _________________?
Deoiling of wax is done by its _________________?
A. Heating
B. Cooling
C. Solvent extraction
D. Both B. & C.
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Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ?
Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ?A. Paraffins
B. Naphthenes
C. Aromatics
D. Iso-paraffinsParaffins are desirable in lubricating oil, as it has got high_____________________?
Paraffins are desirable in lubricating oil, as it has got high_____________________?A. Viscosity
B. Viscosity index
C. Smoke point
D. Pour pointAniline point test of an oil qualitatively indicates the ______________ content of an oil?
Aniline point test of an oil qualitatively indicates the ______________ content of an oil?A. Paraffin
B. Olefin
C. Aromatic
D. NaphtheneMaximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is _______________ centistokes (or 100 Redwood I seconds) ?
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. 100Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of ____________________?
Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of ____________________?A. Thermal cracking
B. Gum formation
C. Coking
D. DiscolorationWhich of the following tests is not done for transformer oil ?
Which of the following tests is not done for transformer oil ?A. Flash point and acid value
B. Aniline point
C. Dielectric strength
D. Copper strip corrosion test