MCQOPTIONS
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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. |
How do the chances of spontaneous combustion of coal can decrease? |
| A. | Decrease in the maturity of coal |
| B. | By washing the coal time to time |
| C. | Increase in the maturity of coal |
| D. | By the reducing the quantity of coal |
| Answer» D. By the reducing the quantity of coal | |
| 2. |
Which of the following is a disadvantage of storing coal for a long period of time? |
| A. | Increase in the friability of coal |
| B. | Decrease in its ignition temperature |
| C. | Increase in its calorific value |
| D. | Increase in the proportion of fine |
| Answer» E. | |
| 3. |
What is the main purpose for a blending of coal? |
| A. | To produce more amount of coal |
| B. | To produce good quality of coal |
| C. | To decrease the cost of coal |
| D. | To produce different types of coal at same time |
| Answer» C. To decrease the cost of coal | |
| 4. |
Which of the following is not an advantage of the cleaning of coal? |
| A. | It increases the cost of the coal |
| B. | It increases the efficiency of coal |
| C. | It removes the impurities like phosphorous and sulphur |
| D. | It reduces its ash content |
| Answer» B. It increases the efficiency of coal | |
| 5. |
Froth flotation process is used for ____________________ |
| A. | Screening of coal |
| B. | Beneficiation of coal |
| C. | Dewatering of coal |
| D. | Mining of coal |
| Answer» C. Dewatering of coal | |
| 6. |
For coarse fractions of dewatering of coal, which of the following process is used? |
| A. | Filtration |
| B. | Thickening |
| C. | Flocculation |
| D. | Centrifugation |
| Answer» E. | |
| 7. |
Which of the following is used for the removal of impurities by heavy media separation in industries? |
| A. | Magnetite |
| B. | Zinc chloride |
| C. | Bromoform |
| D. | Carbon Tetrachloride |
| Answer» B. Zinc chloride | |
| 8. |
By which process does the impurities of coal are generally removed? |
| A. | Screening process |
| B. | Sorting |
| C. | Blending |
| D. | Wet washing |
| Answer» E. | |
| 9. |
How is the sizing of coal processed? |
| A. | By the use of measuring instruments |
| B. | By the use of computer software |
| C. | By crushing and screening |
| D. | By the mass of the coal |
| Answer» D. By the mass of the coal | |
| 10. |
How do the non-coking coals are subjected to consumers in India? |
| A. | By washing |
| B. | By sizing |
| C. | By sorting |
| D. | By blending |
| Answer» C. By sorting | |