MCQOPTIONS
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MCQOPTIONS
This section includes 14 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 liquid lubricant may be _______ |
| A. | Boiled |
| B. | Evaporated |
| C. | Sublimated |
| D. | Heated |
| Answer» C. Sublimated | |
| 2. |
Generation of heat takes place in __________ lubrication. |
| A. | Thin lubrication |
| B. | Thick lubrication |
| C. | Extreme pressure lubrication |
| D. | Boundary lubrication |
| Answer» D. Boundary lubrication | |
| 3. |
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 | |
| 4. |
The coefficient of friction of unlubricated surface ranges about _________ |
| A. | 0.1-1.5 |
| B. | 0.1-0.5 |
| C. | 0.1-1.0 |
| D. | 1.5-2.0 |
| Answer» B. 0.1-0.5 | |
| 5. |
GENERATION_OF_HEAT_TAKES_PLACE_IN____________LUBRICATION.?$ |
| A. | Thin lubrication |
| B. | Thick lubrication |
| C. | Extreme pressure lubrication |
| D. | Boundary lubrication |
| Answer» D. Boundary lubrication | |
| 6. |
The_liquid_lubricant_may_be________$ |
| A. | Boiled |
| B. | Evaporated |
| C. | Sublimated |
| D. | Heated |
| Answer» C. Sublimated | |
| 7. |
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 | |
| 8. |
In boundary lubrication, the coefficient of friction ranges about ______ |
| A. | 0.05-0.1 |
| B. | 0.5-0.15 |
| C. | 0.05-0.15 |
| D. | 1-1.5 |
| Answer» D. 1-1.5 | |
| 9. |
The continuous fluid film cannot be maintained between the rubbing surfaces under the condition such as high load in boundary lubrication. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
The effectiveness of the hydro dynamic lubrication does not depends upon the ________ |
| A. | Design of bearing |
| B. | Load |
| C. | Rate of rotation of shaft |
| D. | Area of shaft |
| Answer» E. | |
| 11. |
The coefficient of friction of unlubricated surface ranges about _________ |
| A. | 0.1-1.5 |
| B. | 0.1-0.5 |
| C. | 0.1-1.0 |
| D. | 1.5-2.0 |
| Answer» B. 0.1-0.5 | |
| 12. |
The liquid lubricants stick due to the _________ property. |
| A. | Surface tension |
| B. | Viscosity |
| C. | Temperature coefficient |
| D. | Mass of the liquid |
| Answer» C. Temperature coefficient | |
| 13. |
The thickness of the lubricant film in the hydro dynamic lubrication is about __________ |
| A. | 1000<sup>o</sup>A |
| B. | 5000<sup>o</sup>A |
| C. | 500<sup>o</sup>A |
| D. | 100<sup>o</sup>A |
| Answer» B. 5000<sup>o</sup>A | |
| 14. |
How many mechanisms are there for lubrication? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |