MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
At what temperature should the coal be heated so as to determine the moisture content of coal? |
| A. | 90-100<sup>o</sup>C |
| B. | 145-155<sup>o</sup>C |
| C. | 125-140<sup>o</sup>C |
| D. | 105-110<sup>o</sup>C |
| Answer» E. | |
| 2. |
Ashes with fusion temperature above than 1430oC are called as ___________ |
| A. | Fixed ash |
| B. | Free ash |
| C. | Refractory ash |
| D. | Fusible ash |
| Answer» D. Fusible ash | |
| 3. |
For manufacturing of metallurgical coke which of the following properties a coal should have? |
| A. | Low volatile matter and high fixed carbon content |
| B. | High volatile matter and high fixed carbon content |
| C. | High volatile matter and low fixed carbon content |
| D. | Low volatile matter and low fixed carbon content |
| Answer» B. High volatile matter and high fixed carbon content | |
| 4. |
Which of the following component is not a constituent of coal? |
| A. | Moisture |
| B. | Ash |
| C. | Fixed carbon |
| D. | Volatile matter |
| Answer» E. | |
| 5. |
Why is the high percentage of moisture undesirable for coal? |
| A. | It increases the rate of combustion |
| B. | It increases the cost of the coal |
| C. | It reduces the calorific value of coal |
| D. | It decreases its ignition temperature |
| Answer» D. It decreases its ignition temperature | |
| 6. |
Proximate analysis includes the estimation of ash, carbon, hydrogen, sulphur, nitrogen and oxygen. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
Which of the following coal contains alternative dull and laminated layers? |
| A. | Cannel coals |
| B. | Banded coals |
| C. | Splint coals |
| D. | Bog-head coals |
| Answer» C. Splint coals | |
| 8. |
How is peat directly converted into anthracite by the process of parallel evolution (Hilt s law)? |
| A. | By maintaining the acid conditions |
| B. | By the process of consolidation and dewatering |
| C. | By the aerobic decay of peat |
| D. | By continuous eliminations of H<sub>2</sub> gas |
| Answer» E. | |
| 9. |
Which of the following substance is transformed to coal in its early stage? |
| A. | Animal debris |
| B. | Bacteria |
| C. | Vegetable debris |
| D. | Non-living compounds |
| Answer» D. Non-living compounds | |
| 10. |
What is the time required for the formation of young brown coals? |
| A. | 10<sup>7</sup> years |
| B. | 3 10<sup>8</sup> years |
| C. | 3 10<sup>9</sup> years |
| D. | 10<sup>10</sup> years |
| Answer» B. 3 10<sup>8</sup> years | |