MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Pulp & Paper Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The ____________ is extraction of de-graded lignin compounds, which would increment the chemical usage in subsequent bleaching stages. |
| A. | a)B stage |
| B. | b)C stage |
| C. | c)D stage |
| D. | d)E stage |
| Answer» E. | |
| 2. |
Bleaching with H2O2, is not common for chemical pulps. (But this is changing somewhat as mills look for chlorine-free systems.) It’s used for brightening mechanical pulps. What is the name of the alternative method utilized? |
| A. | a)E stage |
| B. | b)H stage |
| C. | c)P stage |
| D. | d)D stage |
| Answer» D. d)D stage | |
| 3. |
____________ and other chemicals are considered for bleaching stages, but don’t enjoy commercial importance. |
| A. | a)Nitrogen oxides |
| B. | b)Nitrogen peroxide |
| C. | c)Nitrous hydroxide |
| D. | d)Hydrogen |
| Answer» B. b)Nitrogen peroxide | |
| 4. |
The ____________ stage is a modification of C stage bleaching, where some of the chlorine is replaced with ClO2. |
| A. | a)AD |
| B. | b)CD |
| C. | c)FD |
| D. | d)MD |
| Answer» C. c)FD | |
| 5. |
2NaCl + 2 H2O + ____________ andrarr; Cl2 + 2NaOH + H2 |
| A. | a)Electricity |
| B. | b)Heat |
| C. | c)Acid |
| D. | d)Alkali |
| Answer» B. b)Heat | |
| 6. |
Mechanical pulp bleaching is accomplished with various compounds containing Cl or O2 and alkali extractions in several stages. |
| A. | a)True |
| B. | b)False |
| Answer» C. | |
| 7. |
Cellulose viscosity of mechanical pulps and of high yield pulps are not measured since it’s quite low . |
| A. | a)True |
| B. | b)False |
| Answer» C. | |