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
Related Mcqs:
- ________________ treatment is done for appreciable improvement in viscosity index of lubricating oil?
A. Acid
B. Solvent extraction
C. Alkali
D. Clay - 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 - 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 - Diesel index (an alternative index for expressing the quality of diesel) is_______________?
A. Determined by using a test engine
B. Not related to aniline point
C. Equal to cetane number plus 3
D. All A., B. & C. - 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 - Which of the following has the highest viscosity of all (at a given temperature) ?
A. Naphtha
B. Fuel oil
C. Light diesel oil
D. Petrol - With increase in density, the viscosity of petroleum products _____________________?
A. Increases
B. Decreases
C. Remain same
D. Either A. or B.
