MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Olefins have higher anti-knocking properties than the corresponding ______________ |
| A. | Paraffin |
| B. | Benzene |
| C. | Toluene |
| D. | Nitrobenzene |
| Answer» B. Benzene | |
| 2. |
Which of the following compound has the least knocking properties? |
| A. | n-heptane |
| B. | n-hexane |
| C. | n-pentane |
| D. | n-butane |
| Answer» E. | |
| 3. |
How is the knocking tendency increased? |
| A. | Due to the compression ratio of the engine |
| B. | Due to size of the engine |
| C. | Due to the decrease in the engine speed |
| D. | Due to a defect in an engine |
| Answer» D. Due to a defect in an engine | |
| 4. |
Which of the following compound produces the least knocking? |
| A. | Benzyl |
| B. | Paraffin |
| C. | Olefin |
| D. | Diesel |
| Answer» B. Paraffin | |
| 5. |
At what value of compression ratio, a knock can be heard? |
| A. | At the minimum value |
| B. | At the maximum value for power output |
| C. | At the maximum value above the power output |
| D. | In between of lowest and highest value |
| Answer» D. In between of lowest and highest value | |
| 6. |
The power output of engine increases continuously with an increase in the compression ratio. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
On what factor does the temperature of the engine depend? |
| A. | Rate of oxidation |
| B. | Size of the engine |
| C. | Compression ratio of the engine |
| D. | Fuel used in the engine |
| Answer» D. Fuel used in the engine | |
| 8. |
How will be the knocking sound produce in an engine? |
| A. | Due to an increase in the rate of oxidation of hydrocarbon |
| B. | Due to a decrease in the rate of oxidation of hydrocarbon |
| C. | Due to the impurities present in fuel |
| D. | Due to an increase in the percentile of ethanol molecule |
| Answer» B. Due to a decrease in the rate of oxidation of hydrocarbon | |
| 9. |
On what factor does the rate of oxidation of a hydrocarbon molecule depend? |
| A. | On the calorific value of the compound |
| B. | On the number of carbon atoms |
| C. | On the rate of combustion |
| D. | On its moisture content |
| Answer» C. On the rate of combustion | |
| 10. |
Which compound of fuel is oxidised in the process of knocking? |
| A. | Coke |
| B. | Gasoline |
| C. | Hydrocarbon |
| D. | Compounds containing sulphur |
| Answer» D. Compounds containing sulphur | |