Related Questions

After the increase of price of oil by 40%, a family decided to reduce its oil consumption so that the expenditure for oil goes up by 26% only. If the total consumption of oil before the price rise was 10 kg per month, then what is the current consumption of oil per month (in kg)?
A 8
B 8.50
C 9
D None of these
If P denotes + Q denotes - R, denots +and S denotes X, then what is the value of 18s36R12Q6p7?
A 115
B 55
C 25
D none of these
If p denotes + , Q dentes -, R denotes ÷, and S denotes X, then what is the value of 18s36R12Q6p7?
A 115
B 55
C 25
D None of them
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
__________ treatment is done for appreciable improvement in viscosity index of lubricating oil.
A Acid
B Solvent extraction
C Alkali
D Clay
A multigrade lubricating oil means an oil having high
A Viscosity index
B Viscosity
C Aniline point
D Flash point
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
With increase in temperature, the thermal conductivity of fresh lubricating oil
A Increases
B Decreases
C Remains unchanged
D May increase or decrease; depends on its composition
Paraffins are desirable in lubricating oil, as it has got high
A Viscosity
B Viscosity index
C Smoke point
D Pour point
Detergent is added as an additive in engine lubricating oil to
A Reduce deposit formation
B Keep contaminants in suspension
C Increase oxidation stability
D Prevent rusting

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