MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Pulp Paper knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why is zone refining carried out in an inert atmosphere? |
| A. | To prevent reduction of metal |
| B. | To prevent oxidation of metal |
| C. | To reduce the external pressure |
| D. | To reduce the external temperature |
| Answer» C. To reduce the external pressure | |
| 2. |
Which of the following is not refined by zone refining method? |
| A. | Germanium |
| B. | Silicon |
| C. | Gallium |
| D. | Gold |
| Answer» E. | |
| 3. |
Which of the following is an electrolyte used during the electrolytic refining of copper? |
| A. | Copper sulphate solution |
| B. | Copper sulphate solution acidified with sulphuric acid |
| C. | Sulphuric acid |
| D. | Copper chloride |
| Answer» C. Sulphuric acid | |
| 4. |
What is the purity range for copper obtained from electrolytic refining? |
| A. | 90-95% |
| B. | 98-99% |
| C. | 100% |
| D. | 99.95-99.99% |
| Answer» E. | |
| 5. |
What is the anode made up of in electrolytic refining? |
| A. | Impure metal |
| B. | The metal ore |
| C. | Pure metal |
| D. | Double salt of metal |
| Answer» B. The metal ore | |
| 6. |
Which of the following processes is used to purify lead? |
| A. | Distillation |
| B. | Liquation |
| C. | Electrolytic refining |
| D. | Zone refining |
| Answer» C. Electrolytic refining | |
| 7. |
Zone refining is also called fractional crystallization. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which of the following metals cannot be refined by distillation? |
| A. | Zinc |
| B. | Cadmium |
| C. | Mercury |
| D. | Tin |
| Answer» E. | |
| 9. |
Which of the following is not an impurity generally present in crude metals? |
| A. | Other metals |
| B. | Non-metals |
| C. | Unreacted oxides |
| D. | Pine oil |
| Answer» E. | |
| 10. |
Refining is not an important process in metallurgy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
In __________ both the burst and tear strengths are crucial, although increment in refining to raise the burst strength leads to less tear strength. |
| A. | Brown paper bag |
| B. | Polythene |
| C. | Black paper bag |
| D. | Carton bag |
| Answer» B. Polythene | |
| 12. |
__________ is a measure of the power input to the motors of the refiner based on the amount of pulp processed. It’s an indirect measure of the energy spent in cutting. |
| A. | Refining power |
| B. | Actualization power |
| C. | Compartmentalization power |
| D. | Degree power |
| Answer» B. Actualization power | |
| 13. |
Fill in the blank. __________= (∑ Ni X Li)/ (∑ Ni) |
| A. | Pulp average processed |
| B. | Mass average processed |
| C. | Weight average processed |
| D. | Number average length |
| Answer» E. | |
| 14. |
What is the name of the part? |
| A. | Cutting coarse bar |
| B. | Double disk refiner |
| C. | Twin flow refiners |
| D. | Food processing |
| Answer» D. Food processing | |
| 15. |
Mass average lengt? |
| A. | Weight average length |
| B. | Power average momentum |
| C. | Work done average power |
| Answer» B. Power average momentum | |
| 16. |
Refiners are machines that mechanically macerate and/or cut pulp fibers prior to making them into paper. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 17. |
What are the 2 types of refiners in refining? |
| A. | Cubical and cuboidal |
| B. | Circular and triangular |
| C. | Disk and conical |
| D. | Conical and circular |
| Answer» D. Conical and circular | |
| 18. |
A __________ is an early device used to treat pulp to improve the papermaking properties. |
| A. | Refiner |
| B. | Beater |
| C. | Hinge |
| D. | Spreader cone |
| Answer» C. Hinge | |
| 19. |
__________ is the production of rough surfaces on fibers by mechanical action; refiners break the outer layer of fibers and the secondary cell wall to protrude from the fiber surfaces. |
| A. | Fibrillation |
| B. | Drainage |
| C. | Fiber cutting |
| D. | Fiber brushing |
| Answer» B. Drainage | |
| 20. |
Pulp refining is a chemical treatment process of pulp fibers to evolve their papermaking properties in which paper properties depend on the product being made. |
| A. | True |
| B. | False |
| Answer» C. | |