MCQOPTIONS
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MCQOPTIONS
This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find the % of C from the following data. |
| A. | 68.9g |
| B. | 62.1g |
| C. | 63.1g |
| D. | 70.8gView Answer |
| Answer» B. 62.1g | |
| 2. |
During metallurgical operations, n2 causes ___________ |
| A. | hardness to sample |
| B. | softness to sample |
| C. | moisture to sample |
| D. | heat to sample |
| Answer» B. softness to sample | |
| 3. |
% of nitrogen can be determined by the process _________ |
| A. | dulong’s formula |
| B. | orsat’s apparatus |
| C. | kjeldahl’s method |
| D. | fractional distillation |
| Answer» D. fractional distillation | |
| 4. |
In determination of % of C and H, the coal is burnt in the stream of _______ |
| A. | pure sulphur |
| B. | pure nitrogen |
| C. | pure alcohol |
| D. | pure oxygen |
| Answer» E. | |
| 5. |
Ultimate analysis of coal is also called as _________ |
| A. | quantitative analysis |
| B. | elementary analysis |
| C. | qualitative analysis |
| D. | secondary analysis |
| Answer» D. secondary analysis | |
| 6. |
The moisturizing the coal before introducing into furnace is called as _________ |
| A. | moisturizing |
| B. | filtering |
| C. | tempering |
| D. | combustion |
| Answer» D. combustion | |
| 7. |
The % of the fixed carbon can be given by _________ |
| A. | %C=[loss in weight due to removal of C/weight of coal sample]*100 |
| B. | %C=[weight of coal/12*100] |
| C. | %C=100-(% of ash) |
| D. | %C=100-(% of moisture+% of volatile matter+% of ash) |
| Answer» E. | |
| 8. |
The moisture content in the coal can be given by heating the coal for _____ hours. |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 6 |
| Answer» C. 4 | |
| 9. |
From the raw piece, coal is manufactured by ________ |
| A. | under crushing |
| B. | over crushing |
| C. | perfectly crushed |
| D. | powdered |
| Answer» D. powdered | |
| 10. |
ULTIMATE_ANALYSIS_OF_COAL_IS_ALSO_CALLED_AS:?$ |
| A. | quantitative analysis |
| B. | elementary analysis |
| C. | qualitative analysis |
| D. | secondary analysis |
| Answer» D. secondary analysis | |
| 11. |
of nitrogen can be determined by the process: |
| A. | dulong’s formula |
| B. | orsat’s apparatus |
| C. | kjeldahl’s method |
| D. | fractional distillation |
| Answer» D. fractional distillation | |
| 12. |
In determination of % of C and H, the coal is burnt in the stream of________ |
| A. | pure sulphur |
| B. | pure nitrogen |
| C. | pure alcohol |
| D. | pure oxygen |
| Answer» E. | |
| 13. |
An increase in 1% of percentage of oxygen decreases the calorific value by ________ |
| A. | 1.7% |
| B. | 2.7% |
| C. | 3.7% |
| D. | 4.7% |
| Answer» B. 2.7% | |
| 14. |
Weight of the coal is 2g and after heating the coal sample, the weight of the coal is 1.82g. What is the % of the moisture in coal? |
| A. | 20% |
| B. | 9% |
| C. | 10% |
| D. | 30% |
| Answer» C. 10% | |
| 15. |
During_metallurgical_operations,_n2_causes____________ |
| A. | hardness to sample |
| B. | softness to sample |
| C. | moisture to sample |
| D. | heat to sample |
| Answer» B. softness to sample | |
| 16. |
The moisturizing the coal before introducing into furnace is called as? |
| A. | moisturizing |
| B. | filtering |
| C. | tempering |
| D. | combustion |
| Answer» D. combustion | |
| 17. |
High % of moisture is undesirable because _________ |
| A. | increases the cost of transport |
| B. | increases the cost of calorific value |
| C. | increases the cost of efficiency |
| D. | decreases the cost of storage cost |
| Answer» B. increases the cost of calorific value | |
| 18. |
The % of the fixed carbon can be given by: |
| A. | %C=[loss in weight due to removal of C/weight of coal sample]*100 |
| B. | %C= [weight of coal/12*100]. |
| C. | %C=100-(% of ash) |
| D. | %C=100-(% of moisture+% of volatile matter+% of ash) |
| Answer» E. | |
| 19. |
To calculate the % of ash content the dry coal is heated in ____________ |
| A. | blast furnace |
| B. | muffle furnace |
| C. | reverberatory furnace |
| D. | electric furnace |
| Answer» C. reverberatory furnace | |
| 20. |
To find the % of volatile matter in coal, it must be heated in the crucible at ______ temperature. |
| A. | 5261<sup>0</sup>C |
| B. | 3281<sup>0</sup>C |
| C. | 825<sup>0</sup>C+10<sup>0</sup>C |
| D. | 925<sup>0</sup>C+20<sup>0</sup>C |
| Answer» E. | |
| 21. |
The moisture content in the coal can be given by heating the coal for _____ hours. |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 6 |
| Answer» C. 4 | |
| 22. |
From the raw piece, coal is manufactured by________ |
| A. | under crushing |
| B. | over crushing |
| C. | perfectly crushed |
| D. | powdered |
| Answer» D. powdered | |
| 23. |
In proximate analysis, which of the following elements can be found? |
| A. | % of moisture content |
| B. | % of carbon |
| C. | % of hydrogen |
| D. | % of nitrogen |
| Answer» B. % of carbon | |