1. sQ1. The process of introducing lubricant between the two moving parts in a machine is called
(A) fortification
(B) liquefaction
(C) addition
(D) lubrication
2. . Lubricants are primarily used to reduce
(A) density
(B) friction
(C) specific gravity
(D) volume
3. . In addition to other industrial applications, lubricants are used for
(A) house construction
(B) cooking
(C) gardening
(D) nuclear reaction
4. . Oil, water, and oil emulsion are used as
(A) Cutting fluids
(B) Engine oils
(C) Gear oil
(D) Lubricant for bearing
5. . Cutting fluids should have viscosity
(A) Low
(B) Moderate
(C) High
(D) Very high
6. . Mineral oils that are used as lubricants are obtained from
(A) petroleum
(B) vegetables
(C) animals
(D) blended oils
7. . A maximum hardness on the Moh’s scale appears to be the practical limit for solid lubricant
(A) 4
(B) 7
(C) 6
(D) 5
8. . Easily oxidized at high temperature into acid and become gummy at low temperature is
(A) blended oils
(B) mineral oils
(C) petroleum oils
(D) animal oils and vegetable oils
9. . The blended oils are mixtures of vegetable oils and
(A) fish oil
(B) oils from feet of cattle
(C) petroleum products
(D) synthetic oil
10. . Petroleum oils have long-chain hydrocarbons, ranging between
(A) 6-50 Carbon atoms
(B) 24-50 Carbon atoms
(C) 18-50 Carbon atoms
(D) 12-50 Carbon atoms
11. . The lubricants which are produced by oils or fats with soap and water at 204-316°C
(A) Petroleum products
(B) Mineral oils
(C) Synthetic oil
(D) Grease
12. . Oiliness of which oils can be improved by adding oils, such as Oleic and Stearic acid
(A) Fish oils
(B) Blended oils
(C) Synthetic oils
(D) Mineral oils from petroleum
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) very low
(B) low
(C) moderate
(D) high
15. . Which lubricant is usually used when it is not practical to use oil
(A) Gas
(B) Solid
(C) Grease
(D) Synthetic
16. . Molybdenum disulfide is a common lubricant
(A) Oil
(B) Semi-solid
(C) 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) Gas
(B) Solid
(C) Grease
(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) Synthetic
(C) Gas
(D) Solid