MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Operations knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A screen is said to be blinded when the _________ |
| A. | Oversized is present in the undersize fraction |
| B. | Undersized is present in the oversize fraction |
| C. | Screen is plugged with solid particles |
| D. | Screen capacity is abruptly increased |
| Answer» B. Undersized is present in the oversize fraction | |
| 2. |
Size measurement of ultrafine particles can be best expressed in terms of _______ |
| A. | Cm |
| B. | Screen size |
| C. | Micron |
| D. | Surface area per unit mass |
| Answer» E. | |
| 3. |
Ultrafine grinders operate principally by _________ |
| A. | Slow compression |
| B. | Impact |
| C. | Attrition |
| D. | Cutting action |
| Answer» D. Cutting action | |
| 4. |
A_SCREEN_IS_SAID_TO_BE_BLINDED_WHEN_THE__________?$ |
| A. | Oversized is present in the undersize fraction |
| B. | Undersized is present in the oversize fraction |
| C. | Screen is plugged with solid particles |
| D. | Screen capacity is abruptly increased |
| Answer» B. Undersized is present in the oversize fraction | |
| 5. |
SIZE_MEASUREMENT_OF_ULTRAFINE_PARTICLES_CAN_BE_BEST_EXPRESSED_IN_TERMS_OF________?$ |
| A. | Cm |
| B. | Screen size |
| C. | Micron |
| D. | Surface area per unit mass |
| Answer» E. | |
| 6. |
Ultrafine grinders operate principally by ________? |
| A. | Slow compression |
| B. | Impact |
| C. | Attrition |
| D. | Cutting action |
| Answer» D. Cutting action | |
| 7. |
The energy consumed by ball mill depends on _________ |
| A. | Its speed |
| B. | Density |
| C. | Wettability |
| D. | Electrical and magnetic properties |
| Answer» E. | |
| 8. |
Screen capacity is expressed in terms of ________ |
| A. | Tons/hr |
| B. | Tons/ft<sup>2</sup> |
| C. | Tons |
| D. | Tons/hr-ft<sup>2</sup> |
| Answer» E. | |
| 9. |
For beneficiation of iron ore, the most commonly used method is ________ |
| A. | Flocculation |
| B. | Froth floatation |
| C. | Jigging and tabling |
| D. | Filter |
| Answer» D. Filter | |
| 10. |
Froth floatation is the most suitable for treating _________ |
| A. | Iron ores |
| B. | Supplied ores |
| C. | Quartile |
| D. | Iron ores |
| Answer» C. Quartile | |
| 11. |
In case of revolving mill, wet grinding compared to dry grinding ___________ |
| A. | Requires more energy |
| B. | Has less capacity |
| C. | Complicates handling and classification of the product |
| D. | Effects the motion of the ball |
| Answer» E. | |
| 12. |
Traces of liquid tar fog present in coke oven gas is separated using _________ |
| A. | Electrostatic precipitator |
| B. | Cyclone separator |
| C. | Strainer |
| D. | Vibrating screen |
| Answer» B. Cyclone separator | |
| 13. |
Ore concentration by jigging is based on the difference in the _______ of the particles. |
| A. | Specific gravities |
| B. | Wet ability |
| C. | Shape |
| D. | Size |
| Answer» B. Wet ability | |