MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
vegetable oils are added to the lubricants to improve their ___________ |
| A. | Lubrication |
| B. | Oiliness |
| C. | Viscosity |
| D. | Efficiency |
| Answer» C. Viscosity | |
| 2. |
Foaming of oils can be prevented by using ___________ |
| A. | Despersants |
| B. | Foam inhibitors |
| C. | Rust inhibitors |
| D. | Oxide inhibitors |
| Answer» C. Rust inhibitors | |
| 3. |
Gear oils on adding viscosity index improves can be used in ___________ |
| A. | Motor vehicles |
| B. | Machinery |
| C. | Air crafts |
| D. | Engines |
| Answer» D. Engines | |
| 4. |
The viscosity index can be improved by adding ___________ |
| A. | Linear polymers |
| B. | Branched polymers |
| C. | Cyclic polymers |
| D. | Inorganic materials |
| Answer» B. Branched polymers | |
| 5. |
On cooling below the pour point, the wax will be __________ |
| A. | Evaporated |
| B. | Condensed |
| C. | Crystallized |
| D. | Sublimated |
| Answer» D. Sublimated | |
| 6. |
The commonly used dispersant is _____________ |
| A. | Carboxylic acid |
| B. | Alkyl phosphoric acid |
| C. | Poly butyl succinic acid |
| D. | Sodium salts of alkyl benzene sulfonic acid |
| Answer» D. Sodium salts of alkyl benzene sulfonic acid | |
| 7. |
The oil insoluble sludge can be reduced by using ____________ |
| A. | Pour point depressants |
| B. | Friction modifiers |
| C. | Oxide inhibitors |
| D. | detergents |
| Answer» E. | |
| 8. |
In automotive applications __________ are used. |
| A. | Friction modifiers |
| B. | Dispersants |
| C. | Anti wear agents |
| D. | Oxide inhibitors |
| Answer» B. Dispersants | |
| 9. |
In steel and steel lubrication, the zinc dialkyl dithiosulphates forms __________ |
| A. | ZnSO<sub>4</sub> |
| B. | ZnSO<sub>2</sub> |
| C. | ZnSO<sub>3</sub> |
| D. | ZnS |
| Answer» E. | |
| 10. |
To reduce the wear and tear of the gears ____________ are used. |
| A. | Anti wear agents |
| B. | Rust inhibitors |
| C. | Oxide inhibitors |
| D. | Dispersants |
| Answer» B. Rust inhibitors | |
| 11. |
Tiadiazole and triazole derivatives are used for __________ |
| A. | Aluminium alloy corrosion |
| B. | Silver corrosion |
| C. | Copper corrosion |
| D. | Manganese corrosion |
| Answer» D. Manganese corrosion | |
| 12. |
The oxidation inhibitors terminate the hydro peroxide chain by combining with ___________ |
| A. | Hydrogen peroxide |
| B. | Oxides of metals |
| C. | Hydro carbons |
| D. | Ozone |
| Answer» B. Oxides of metals | |
| 13. |
The most common reason for the degradation of petroleum oil is their _________ |
| A. | Volatility |
| B. | Oxidation |
| C. | Reduction |
| D. | Temperature coefficient |
| Answer» C. Reduction | |