1. . The process of introducing lubricant between the two moving parts in a machine is called:
(A) Fortification
(B) Liquefaction
(C) Lubrication
(D) Addition
2. . Lubricants are primarily used to reduce:
(A) Friction
(B) Density
(C) Specific gravity
(D) Volume
3. . In addition to other industrial applications, lubricants are used for:
(A) House construction
(B) Nuclear reaction
(C) Gardening
(D) Cooking
4. . Oil, water, and oil emulsion are used as:
(A) Engine oils
(B) Cutting fluids
(C) Gear oil
(D) Lubricant for bearing
5. . Cutting fluids should have viscosity:
(A) Low
(B) High
(C) Moderate
(D) Very high
6. . Mineral oils that are used as lubricants are obtained from:
(A) Animals
(B) Vegetables
(C) Petroleum
(D) Blended oils
7. . A maximum hardness on the Moh’s scale appears to be the practical limit for solid lubricant:
(A) 4
(B) 5
(C) 6
(D) 7
8. . The oils which decompose at high temperature, undergo oxidation easily, forming gummy and acidic hydrolyzed products are:
(A) Animal oils and vegetable oils
(B) Mineral oils
(C) Petroleum oils
(D) Blended oils
9. . The blended oils are mixtures of vegetable oils and:
(A) Fish oil
(B) Oils from feet of cattle
(C) Synthetic oil
(D) Petroleum products
10. . Petroleum oils have long-chain hydrocarbons, ranging between:
(A) 6–50 carbon atoms
(B) 12–50 carbon atoms
(C) 18–50 carbon atoms
(D) 24–50 carbon atoms
11. . The lubricants which are produced by oils or fats with soap and water at 204–316°C are:
(A) Grease
(B) Mineral oils
(C) Synthetic oil
(D) Petroleum products
12. . Oiliness of which oils can be improved by adding oils, such as Oleic and Stearic acid:
(A) Fish oils
(B) Mineral oils from petroleum
(C) Synthetic oils
(D) Blended oils
13. . Synthetic lubricants Polyglycols are produced by oxidation of ethylene and:
(A) Isobutene
(B) Butene
(C) Methylene
(D) Propylene
14. . The solid lubricant should have melting point:
(A) High
(B) Low
(C) Moderate
(D) Very low
15. . Which lubricant is usually used when it is not practical to use oil:
(A) Grease
(B) Solid
(C) Gas
(D) Synthetic
16. . Molybdenum disulfide is a common lubricant:
(A) Oil
(B) Solid
(C) Semi-solid
(D) Gas
17. . Light machines like sewing, watches, scientific equipment require lubricating oil of viscosity:
(A) High
(B) Low
(C) Moderate
(D) Very low
18. . Road rollers, tractors, railway tracks require lubricant:
(A) Grease
(B) Solid
(C) Gas
(D) Synthetic
19. . Steam engine cylinders require lubricant of viscosity:
(A) High
(B) Low
(C) Moderate
(D) Very high
20. . Spaceship, aeroplane engine, submarine engine, military weapons require lubricants:
(A) Grease
(B) Solid
(C) Gas
(D) Synthetic