MCQOPTIONS
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MCQOPTIONS
This section includes 53 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The temperature expressed in multiples of 1oC at which the haze of the wax crystal appears when the oil is cooled under prescribed conditions is called ________ |
| A. | Pour point |
| B. | Cloud point |
| C. | Oxidation stability |
| D. | Acid number |
| Answer» C. Oxidation stability | |
| 2. |
Excessive friction takes place, when the viscosity is ________ |
| A. | Too high |
| B. | Too low |
| C. | Moderate |
| D. | Zero |
| Answer» B. Too low | |
| 3. |
Redwood viscometer no1 is used to find the viscosity of the _________ liquids. |
| A. | High viscous |
| B. | Low viscous |
| C. | Moderate viscous |
| D. | No viscous |
| Answer» C. Moderate viscous | |
| 4. |
Coating and overlays will be done by using _________ |
| A. | inorganic lubricants |
| B. | organic lubricants |
| C. | soft metal |
| D. | oxides |
| Answer» D. oxides | |
| 5. |
In determination of saponification value of the oil reaction _______ is unreacted. |
| A. | NaOH |
| B. | Nacl |
| C. | KOH |
| D. | Kcl |
| Answer» D. Kcl | |
| 6. |
A good liquid lubricant must possess the property of ___________ |
| A. | Low viscosity |
| B. | High boiling point |
| C. | High freezing point |
| D. | Low oiliness |
| Answer» C. High freezing point | |
| 7. |
Which of the following are the disadvantages of solid lubricants? |
| A. | poor heat dissipation |
| B. | more effective even at high pressures |
| C. | high resistance to detoriation |
| D. | permit equipment is heavy |
| Answer» B. more effective even at high pressures | |
| 8. |
________is used in machines operating at high pressure and slow speeds. |
| A. | Kerosene |
| B. | Diesel oil |
| C. | Heavy oil |
| D. | Crude oil |
| Answer» D. Crude oil | |
| 9. |
For machines operating at the high speed and low pressure _______ are used. |
| A. | Heavy oils |
| B. | Light oils |
| C. | Crude oils |
| D. | Diesel oil |
| Answer» C. Crude oils | |
| 10. |
The wear and tear of metal surfaces are involved and _________ are formed in thin lubrication. |
| A. | P-n junctions |
| B. | Welded junctions |
| C. | Layers |
| D. | Thin layers |
| Answer» C. Layers | |
| 11. |
The higher values of blended oils is because of the presence of ___________ |
| A. | Catalyst |
| B. | Salts |
| C. | Additives |
| D. | Reagents |
| Answer» D. Reagents | |
| 12. |
The capacity of the flask is about ________ |
| A. | 100ml |
| B. | 150ml |
| C. | 50ml |
| D. | 25ml |
| Answer» D. 25ml | |
| 13. |
On cooling below the pour point, the wax will be _______ |
| A. | Evaporated |
| B. | Condensed |
| C. | Crystallized |
| D. | Sublimated |
| Answer» D. Sublimated | |
| 14. |
Cooling bath contains suitable ________ |
| A. | Ice |
| B. | Water |
| C. | Cooling mixture |
| D. | Cool water |
| Answer» D. Cool water | |
| 15. |
For, delicate instruments the suitable lubricants are _____ |
| A. | light cutting oil |
| B. | sunflower oil |
| C. | heavy cutting oil |
| D. | thin vegetable oil |
| Answer» E. | |
| 16. |
The mixtures derived from the diverse fatty acids are _________ |
| A. | Glycerides |
| B. | Bi glycerides |
| C. | Triglycerides |
| D. | Polyglycerides |
| Answer» D. Polyglycerides | |
| 17. |
Lubricating oil having low aniline point results in _________ |
| A. | Deterioration of metal |
| B. | Deterioration of rubber |
| C. | Deterioration of wall of jar |
| D. | Deterioration of iron |
| Answer» C. Deterioration of wall of jar | |
| 18. |
Which of the following is not the liquid lubricant? |
| A. | Olive oil |
| B. | Palm oil |
| C. | Castor oil |
| D. | Grease |
| Answer» E. | |
| 19. |
Flame exposure device is connected with _______ |
| A. | Flange |
| B. | Shutter |
| C. | Pilot burner |
| D. | Oil cup |
| Answer» C. Pilot burner | |
| 20. |
The lubricant should have _____ vapor pressure. |
| A. | High |
| B. | Extreme |
| C. | Moderate |
| D. | Low |
| Answer» E. | |
| 21. |
Pensky -Marten's apparatus is used to find out the ________ |
| A. | Cloud point |
| B. | Pour point |
| C. | Flash point |
| D. | Fire point |
| Answer» D. Fire point | |
| 22. |
Petroleum oils are also called as _________ |
| A. | Petrol oils |
| B. | Hydrocarbon oils |
| C. | Fatty oils |
| D. | Whale oil |
| Answer» C. Fatty oils | |
| 23. |
The liquid lubricant may be _______ |
| A. | Boiled |
| B. | Evaporated |
| C. | Sublimated |
| D. | Heated |
| Answer» C. Sublimated | |
| 24. |
What is the best lubricant for tractor roller? |
| A. | graphite |
| B. | heavy oil |
| C. | grease |
| D. | vegetable oil |
| Answer» D. vegetable oil | |
| 25. |
The lowest temperature expressed in multiple of 2oC at which the oil is observed to flow after cooled at prescribed conditions is called pour point. |
| A. | True |
| B. | False |
| Answer» C. | |
| 26. |
The deformations caused in oil paintings are due to saponification. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 27. |
Soft metals possess lubrication due to _____ |
| A. | low plasticity |
| B. | high plasticity |
| C. | no plasticity |
| D. | moderate plasticity |
| Answer» C. no plasticity | |
| 28. |
The neutralisation number cannot give the __________ of the lubricating oil. |
| A. | Corrosive nature |
| B. | Amount of acid |
| C. | Amount of base |
| D. | Moisture level |
| Answer» B. Amount of acid | |
| 29. |
Darkening of the oil colour takes place due to ________ |
| A. | Oxidation |
| B. | Reduction |
| C. | Hydrolysis |
| D. | Catalysis |
| Answer» B. Reduction | |
| 30. |
Petrol captured the market up to the percentage of _____ |
| A. | 1 |
| B. | 0.9 |
| C. | 0.98 |
| D. | 0.75 |
| Answer» D. 0.75 | |
| 31. |
The most common reason for the degradation of the petroleum oil is their ______ |
| A. | Volatility |
| B. | Oxidation |
| C. | Reduction |
| D. | Temperature coefficient |
| Answer» C. Reduction | |
| 32. |
To improve the refined petroleum oils ______ are added. |
| A. | Additives |
| B. | Inhibitors |
| C. | Catalysts |
| D. | Carbon |
| Answer» B. Inhibitors | |
| 33. |
The entire redwood viscometer apparatus rests on _______ |
| A. | Table |
| B. | Stand |
| C. | Tripod stand |
| D. | Burner |
| Answer» D. Burner | |
| 34. |
Friction modifiers have 12-18 carbons. |
| A. | False |
| B. | True |
| Answer» C. | |
| 35. |
Soft metal lubricants are produced by using ______ |
| A. | purifying |
| B. | thermal spraying |
| C. | distillation |
| D. | electroplating |
| Answer» C. distillation | |
| 36. |
Easily oxidised impurities cause ___________ |
| A. | Moisture formation |
| B. | Nitrogen formation |
| C. | Sludge formation |
| D. | Ash formation |
| Answer» D. Ash formation | |
| 37. |
The maximum pour-point requirements for refrigerator system are about ________ for lightest grade. |
| A. | -10oF |
| B. | -20oF |
| C. | -30oF |
| D. | -40oF |
| Answer» E. | |
| 38. |
The long side tube is used to heat the water by means of _______ |
| A. | Burner |
| B. | Spirit lamp |
| C. | Bunsen burner |
| D. | Candle |
| Answer» C. Bunsen burner | |
| 39. |
The lubricants for gears must possess ______ |
| A. | less oiliness |
| B. | effected by centrifugal force |
| C. | resistance to oxygen |
| D. | low load carrying capacity |
| Answer» D. low load carrying capacity | |
| 40. |
The lubricating oils must be refined to remove ___________ |
| A. | Wax |
| B. | Hydrocarbons |
| C. | Nitrogen |
| D. | Oxygen |
| Answer» B. Hydrocarbons | |
| 41. |
Lithium soap greases are_______ |
| A. | temperature resistant |
| B. | fire resistant |
| C. | water resistant |
| D. | pressure resistant |
| Answer» D. pressure resistant | |
| 42. |
In gears, the lubricants are exposed to _______ |
| A. | high temperature |
| B. | high pressure |
| C. | low temperature |
| D. | low pressure |
| Answer» C. low temperature | |
| 43. |
The viscosity index can be improved by adding ______ |
| A. | Linear polymers |
| B. | Branched polymers |
| C. | Cyclic polymers |
| D. | Inorganic materials |
| Answer» B. Branched polymers | |
| 44. |
What is the thickness of the MoS2 film? |
| A. | 10µm |
| B. | 15µm |
| C. | 5µm |
| D. | 20µm |
| Answer» C. 5µm | |
| 45. |
Sodium base greases can be utilized up to the temperature of______ |
| A. | 175oC |
| B. | 100oC |
| C. | 75oC |
| D. | 80oC |
| Answer» B. 100oC | |
| 46. |
In oil in water emulsions, how much water is present _______ |
| A. | 3-20% |
| B. | 40-50% |
| C. | 3-4% |
| D. | 5-8% |
| Answer» B. 40-50% | |
| 47. |
The friction is needed to be reduced because _____ |
| A. | will increase the load |
| B. | will increase the consumption electricity |
| C. | it will be reducing the excess heat generation |
| D. | will increase the excess the heat generation |
| Answer» D. will increase the excess the heat generation | |
| 48. |
A dispersion system consisting of two immiscible liquids is called ________ |
| A. | Lubricants |
| B. | Emulsions |
| C. | Semi solids |
| D. | Solids |
| Answer» C. Semi solids | |
| 49. |
The jacket is provided with a gasket that prevents the test jar from ______ |
| A. | Cooling |
| B. | Heating |
| C. | Breakage |
| D. | Touching the jacket |
| Answer» E. | |
| 50. |
The oil insoluble sludge can be reduced by using _______ |
| A. | Pour point depressants |
| B. | Friction modifiers |
| C. | Oxide inhibitors |
| D. | detergents |
| Answer» E. | |