MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Galvanizing is the process of applying _______ over steel. |
| A. | Carbon |
| B. | Aluminium |
| C. | Zinc |
| D. | Nickel |
| Answer» D. Nickel | |
| 2. |
What is the reduced potential required to prevent the corrosion of steel? |
| A. | 350 mV |
| B. | 250 mV |
| C. | 150 mV |
| D. | 50 mV |
| Answer» B. 250 mV | |
| 3. |
Which ions are used as cathodic inhibitors? |
| A. | Ferric irons |
| B. | Aluminium ions |
| C. | Zinc ions |
| D. | Nickel ions |
| Answer» D. Nickel ions | |
| 4. |
______ are classified as dangerous inhibitors. |
| A. | Cathodic inhibitors |
| B. | Anodic inhibitors |
| C. | Voltage |
| D. | Current flow |
| Answer» C. Voltage | |
| 5. |
The corroding piece of metal is described as a “mixed electrode”. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
WHICH_IONS_ARE_USED_AS_CATHODIC_INHIBITORS??$ |
| A. | Ferric irons |
| B. | Aluminium ions |
| C. | Zinc ions |
| D. | Nickel ions |
| Answer» D. Nickel ions | |
| 7. |
Galvanizing is the process of applying _______ over steel.$ |
| A. | Carbon |
| B. | Aluminium |
| C. | Zinc |
| D. | Nickel |
| Answer» D. Nickel | |
| 8. |
What is the reduced potential required to prevent the corrosion of steel?$ |
| A. | 350 mV |
| B. | 250 mV |
| C. | 150 mV |
| D. | 50 mV |
| Answer» B. 250 mV | |
| 9. |
______ are classified as dangerous inhibitors? |
| A. | Cathodic inhibitors |
| B. | Anodic inhibitors |
| C. | Voltage |
| D. | Current flow |
| Answer» C. Voltage | |
| 10. |
What is pH range for oxygen removal? |
| A. | 3.5-4.5 |
| B. | 6.5-8.5 |
| C. | 10-12 |
| D. | 12-13.5 |
| Answer» C. 10-12 | |
| 11. |
Stainless steel is protected by _______ |
| A. | Iron oxide |
| B. | Nitrous oxide |
| C. | Chromium sesquioxide |
| D. | Carbon monoxide |
| Answer» D. Carbon monoxide | |
| 12. |
Increase in __________ concentration usually gives an increase in corrosion rate. |
| A. | Carbon |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Iron |
| Answer» C. Nitrogen | |
| 13. |
What is pH below which pH increases? |
| A. | 7 |
| B. | 5 |
| C. | 4 |
| D. | 3 |
| Answer» D. 3 | |
| 14. |
The corroding piece of metal is described as a “mixed electrode”.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
A loss in mechanical strength is due to ______ |
| A. | Chemicals |
| B. | Reduction of metal thickness |
| C. | Water flow |
| D. | Water velocity |
| Answer» C. Water flow | |
| 16. |
Which is the most widely used material in water conduits? |
| A. | Steel |
| B. | Aluminium |
| C. | Copper |
| D. | Nickel |
| Answer» B. Aluminium | |
| 17. |
Corrosion is the deterioration of materials by chemical interaction with their environment. |
| A. | True |
| B. | False |
| Answer» B. False | |