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. |
On what basis does the grading of coals is done in India for coals containing high moisture? |
| A. | On the basis of its calorific value |
| B. | On the basis of its volatile matter |
| C. | On the basis of its ignition temperature |
| D. | On the basis of its ash content and moisture |
| Answer» E. | |
| 2. |
Which type of coal is found in the Cutch and Lameta ghat of Narbada valley? |
| A. | Gondwana |
| B. | Jurassic |
| C. | Tertiary |
| D. | Cretaceous |
| Answer» C. Tertiary | |
| 3. |
Which region of Gondwana coals have prime coking coals deposits? |
| A. | Bilaspur |
| B. | Raniganj |
| C. | Jharia |
| D. | Chhindwara |
| Answer» D. Chhindwara | |
| 4. |
How can we calculate the calorific value of coal using proximate analysis? |
| A. | By using Seyler s formulae |
| B. | By using Dulong s formula |
| C. | By using Davies formulae |
| D. | By using Nakamura s formulae |
| Answer» E. | |
| 5. |
Which of the following is the expression for determination of calorific value of coal using Davies formulae? (where CV is calorific value, %H is percentage of hydrogen, %C is percentage of carbon, %O is percentage of oxygen and %S is percentage of sulphur.) |
| A. | CV = (6.543 %H + 403)[%C/3 + %H (%O %S)/8] |
| B. | CV = (6.543 %H + 403)[%C/3 + %H + (%O %S)/8] |
| C. | CV = (6.543 %H 403)[%C/3 + %H (%O %S)/8] |
| D. | CV = (6.543 %H 403)[%C/3 + %H + (%O %S)/8] |
| Answer» B. CV = (6.543 %H + 403)[%C/3 + %H + (%O %S)/8] | |
| 6. |
Which of the following substance contributes towards its heating value? |
| A. | Nitrogen |
| B. | Hydrogen |
| C. | Sulphur |
| D. | Oxygen |
| Answer» D. Oxygen | |
| 7. |
Carbon, hydrogen and oxygen directly contribute towards the calorific value of the coal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
What is the product obtained in the determination of the percentage of nitrogen by ultimate analysis? |
| A. | Nitrogen di-oxide |
| B. | Nitrogen oxide |
| C. | Ammonia |
| D. | Ammonium ion |
| Answer» D. Ammonium ion | |
| 9. |
In ultimate analysis, how does the percentage of carbon and hydrogen are determined? |
| A. | By using pure oxygen |
| B. | By using pure nitrogen |
| C. | By using pure sulphur |
| D. | By using pure silicon |
| Answer» B. By using pure nitrogen | |
| 10. |
At what temperature does the ash is determined by heating to complete its combustion? |
| A. | 400<sup>o</sup> C |
| B. | 600<sup>o</sup> C |
| C. | 850<sup>o</sup> C |
| D. | 750<sup>o</sup> C |
| Answer» E. | |