A. Less changes in fluidity of oil with temperature
B. Substantially high change in fluidity of oil with temperature
C. Its unsuitability under varying temperature conditions
D. None of these
Related Mcqs:
- Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its________________?
A. Poor oxidation stability and high gum forming tendency
B. Greater tendency of decomposition at elevated temperature
C. Hydrolysis tendency in presence of water
D. All A, B. and C - Lubricating greases are a mixture of__________________?
A. Mineral oil, soap and additives
B. Mineral oil and metallic soap
C. Mineral oil and fatty oil
D. Fatty oil and metallic soap - Sodium salt of higher molecular weight fatty acid is termed as the ______________________ soap?
A. Hard
B. Soft
C. Metallic
D. Lubricating - Hydrogenation of oil takes place in a/an ____________________ reactor ?
A. Autothermal
B. Trickle bed
C. Plug flow
D. None of these - Hydrogenation of oil does not ___________________?
A. Remove double bonds
B. Raise its melting point
C. Improve its resistance to oxidation
D. None of these - Fusel oil is a/an_________________?
A. Essential oil
B. Extract from medicinal herbs
C. Mixture of higher molecular weight alcohols (a by-product obtained during production of
alcohol from molasses)
D. None of these - Saponification value/number of an oil or fat is a measure of its ___________________?
A. Fatty acid content
B. Degree of unsaturation of the fatty acids present in it
C. Average molecular weight
D. Insoluble fatty acid content - Tall oil obtained as a by-product from the black liquor recovery is________________?
A. A black, sticky & viscous liquid
B. Used in the manufacture of greases, emulsions & soaps
C. Composed mainly of rosin & fatty acids
D. All A , B. & C. - Catalyst used in the hydrogenation of oil is_________________?
A. Nickel
B. Platinum
C. Iron
D. Alumina - Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________?
A. Decreases with decrease of thickness of the flakes
B. Increases with the increasing flake size keeping the flake thickness constant
C. Increases considerably with the rise of temperature
D. Decreases as the moisture content of flakes increases
