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. |
In proximate analysis of coal, %fixed carbon = __________ |
| A. | 100 % (ash + volatile matter + moisture) |
| B. | 100 % (ash + moisture) |
| C. | 100 % (ash + moisture) + %volatile matter |
| D. | 100 % (moisture + volatile matter) |
| Answer» B. 100 % (ash + moisture) | |
| 2. |
__________ is the weight of residue obtained after burning a weighed amount of dry coal. |
| A. | Ash |
| B. | Volatile matter |
| C. | Moisture |
| D. | Carbon |
| Answer» B. Volatile matter | |
| 3. |
In ultimate analysis, %carbon is given by __________ |
| A. | (Increase in weight of KOH tube 12 100 / weight of coal sample taken 44) |
| B. | (Increase in weight of KOH tube 2 100 / weight of coal sample taken 18) |
| C. | (Increase in weight of CaCl<sub>2</sub> tube 12 100 / weight of coal sample taken 44) |
| D. | (Increase in weight of CaCl<sub>2</sub> tube 2 100 / weight of coal sample taken 18) |
| Answer» B. (Increase in weight of KOH tube 2 100 / weight of coal sample taken 18) | |
| 4. |
In ultimate analysis, %hydrogen is given by __________ |
| A. | (Increase in weight of CaCl<sub>2</sub> tube 2 100 / weight of coal sample taken 18) |
| B. | (Increase in weight of KOH tube 2 100 / weight of coal sample taken 18) |
| C. | (Increase in weight of CaCl<sub>2</sub> tube 4 100 / weight of coal sample taken 18) |
| D. | (Increase in weight of KOH tube 4 100 / weight of coal sample taken 18) |
| Answer» B. (Increase in weight of KOH tube 2 100 / weight of coal sample taken 18) | |
| 5. |
In coal, Sulphur is usually present in the extent of __________ |
| A. | 0.5-3% |
| B. | 90-95% |
| C. | 70-75% |
| D. | 80-85% |
| Answer» B. 90-95% | |
| 6. |
Percentage of ash by analysis of coal is given by _____ |
| A. | (weight of residue/weight of sample) 100 |
| B. | (weight of sample weight of residue) 100 |
| C. | (weight of sample weight of residue)/weight of sample 100 |
| D. | (weight of residue weight of sample) 100 |
| Answer» B. (weight of sample weight of residue) 100 | |
| 7. |
Good quality of coal should have _____ % of oxygen. |
| A. | low |
| B. | high |
| C. | 100 |
| D. | 0 |
| Answer» B. high | |
| 8. |
Hydrogen available for combustion is lesser than the actual one. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 9. |
In determination of carbon and hydrogen by ultimate analysis, increase in weight of calcium chloride bulb represents ______ |
| A. | weight of water formed |
| B. | weight of carbon dioxide formed |
| C. | carbon |
| D. | hydrogen |
| Answer» B. weight of carbon dioxide formed | |
| 10. |
In analysis of coal, determination of _______ is done by Kjeldahl method. |
| A. | Volatile matter |
| B. | Nitrogen |
| C. | Ash |
| D. | Oxygen |
| Answer» C. Ash | |