Q.1
A good liquid lubricant must possess the property of ___________
  • a) Low viscosity
  • b) High boiling point
  • c) High freezing point
  • d) Low oiliness
Q.2
Which of the following is not the liquid lubricant?
  • a) Olive oil
  • b) Palm oil
  • c) Castor oil
  • d) Grease
Q.3
Castor oil is used for _______
  • a) Plastic industry
  • b) For guns
  • c) For sewing machines
  • d) Light machinery
Q.4
Petroleum oils are also called as _________
  • a) Petrol oils
  • b) Hydrocarbon oils
  • c) Fatty oils
  • d) Whale oil
Q.5
Petrol captured the market up to the percentage of _________
  • a) 100%
  • b) 90%
  • c) 98%
  • d) 75%
Q.6
The lubricating oils must be refined to remove ___________
  • a) Wax
  • b) Hydrocarbons
  • c) Nitrogen
  • d) Oxygen
Q.7
Easily oxidised impurities cause ___________
  • a) Moisture formation
  • b) Nitrogen formation
  • c) Sludge formation
  • d) Ash formation
Q.8
To improve the refined petroleum oils ___________ are added.
  • a) Additives
  • b) Inhibitors
  • c) Catalysts
  • d) Carbon
Q.9
A dispersion system consisting of two immiscible liquids is called ________
  • a) Lubricants
  • b) Emulsions
  • c) Semi solids
  • d) Solids
Q.10
In oil in water emulsions, how much water is present ___________
  • a) 3-20%
  • b) 40-50%
  • c) 3-4%
  • d) 5-8%
Q.11
The emulsifiers in water in oil type emulsions are ________
  • a) Sodium salts
  • b) Potassium salts
  • c) Oxides
  • d) Alkaline earth soaps
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