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. |
Which of the following compound is added to the petrol engine to overcome the problems caused by tetra ethyl lead (TEL)? |
| A. | Methylene dibromide |
| B. | Ethylene dibromide |
| C. | Propylene dibromide |
| D. | Butylene dibromide |
| Answer» C. Propylene dibromide | |
| 2. |
What is the work of TEL in addition in petrol engine? |
| A. | It increases its induction period by 200-300 % |
| B. | It decreases the induction period by 50 % |
| C. | It increases the induction period by 50-100 % |
| D. | It increases the induction period by 400-500 % |
| Answer» B. It decreases the induction period by 50 % | |
| 3. |
How is knocking produced in a petrol engine? |
| A. | Due to the size of the engine |
| B. | Due to spontaneous combustion in the engine |
| C. | Due to the presence of less impurities in the fuel |
| D. | Due to the parts of the engine |
| Answer» C. Due to the presence of less impurities in the fuel | |
| 4. |
At most how much ml of TEL can be added, so as to increase the octane rating of aviation fuel? |
| A. | 15 ml per gallon |
| B. | 9 ml per gallon |
| C. | 7 ml per gallon |
| D. | 5 ml per gallon |
| Answer» D. 5 ml per gallon | |
| 5. |
At what temperature does TEL (tetra ethyl lead) starts getting decomposed? |
| A. | 500 <sup>0</sup>C |
| B. | 100 <sup>0</sup>C |
| C. | 900 <sup>0</sup>C |
| D. | 200 <sup>0</sup>C |
| Answer» E. | |
| 6. |
Gasoline containing TEL is colourless to indicate its poisonous nature. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
How much ml of tetra ethyl lead (TEL) is added to aviation petrol? |
| A. | 1 ml/litre |
| B. | 0.5 ml/litre |
| C. | 2 ml/ litre |
| D. | 3 ml/litre |
| Answer» B. 0.5 ml/litre | |
| 8. |
What is the specific gravity of tetra ethyl lead (TEL)? |
| A. | 1.09 |
| B. | 1 |
| C. | 1.97 |
| D. | 1.62 |
| Answer» E. | |
| 9. |
Which compound is usually added to decrease the knocking in the engine? |
| A. | Sulphur |
| B. | Phosphorous |
| C. | Tetra ethyl lead |
| D. | Vanadium penta-oxide |
| Answer» D. Vanadium penta-oxide | |
| 10. |
How can we increase the octane rating of gasoline? |
| A. | By addition of fuel of low anti-knock value |
| B. | By addition of fuel of high anti-knock value |
| C. | By adding a product of high cetane rating |
| D. | By heating of the fuel |
| Answer» C. By adding a product of high cetane rating | |