MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
What is the feed size for a buhrstone mill? |
| A. | Size of peat |
| B. | Size of rock |
| C. | Size of grain |
| D. | Any size |
| Answer» D. Any size | |
| 2. |
Which of the following uses shearing action? |
| A. | Buhrstone mill |
| B. | Tumbling mill |
| C. | Rod mill |
| D. | Ball mill |
| Answer» B. Tumbling mill | |
| 3. |
What is percentage of tumbling mill speed? |
| A. | 80 to 100% |
| B. | 65 to 80% |
| C. | 50 to 90% |
| D. | 10 to 50% |
| Answer» C. 50 to 90% | |
| 4. |
At critical speed, = 0 and cos = 1, what is critical speed? |
| A. | n = nc |
| B. | 2 = nc |
| C. | g = nc |
| D. | gn= nc |
| Answer» B. 2 = nc | |
| 5. |
What is the angle of nip for ball mill? |
| A. | 4 <sup>2</sup>n<sup>2</sup> (R-d)/g |
| B. | 4 <sup>2</sup>n<sup>2</sup> (R+d)/g |
| C. | 4 <sup>2</sup>n<sup>2</sup> (R-r)/g |
| D. | 4 <sup>2</sup>n<sup>2</sup> (R-n)/g |
| Answer» D. 4 <sup>2</sup>n<sup>2</sup> (R-n)/g | |
| 6. |
Which of the following is true, when operating speed is less than critical speed? |
| A. | No grinding |
| B. | Effective grinding |
| C. | Best grinding |
| D. | Bold grinding |
| Answer» B. Effective grinding | |
| 7. |
Which of the following forces act on the tumbling mill? |
| A. | Tangential force |
| B. | Centrifugal force |
| C. | Circular force |
| D. | Gravitational force |
| Answer» C. Circular force | |
| 8. |
What is the ratio of length to diameter of tube mill? |
| A. | 4:1 |
| B. | 3 |
| C. | Both 3 and 4:1 |
| D. | 1:2 |
| Answer» D. 1:2 | |
| 9. |
The ball mill can be best used for which kind of feed? |
| A. | Wet and Dry |
| B. | Coarse and Fine |
| C. | Rocks and Bricks |
| D. | Any kind of feed |
| Answer» B. Coarse and Fine | |