MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Oxides of nitrogen in Petrol engine exhaust can be reduced by the following methods:1. Use of 5% lean mixture2. Advancing the spark timing3. Recirculating a fraction of exhaust gas4. Using an oxidation catalyst in the exhaust manifoldWhich of the above statements is/are correct? |
| A. | 1 and 2 |
| B. | 2 only |
| C. | 3 and 4 |
| D. | 3 only |
| Answer» E. | |
| 2. |
Oxides of nitrogen in the engines exhaust can be reduced by the following methods:1. Decrease in compression ratio2. Exhaust gas recirculation3. Use of 5% lean mixture4. Use of oxidation catalysts in exhaust manifold.The correct methods are |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 1, 2 and 4 |
| D. | 2, 3 and 4 |
| Answer» D. 2, 3 and 4 | |
| 3. |
In Diesel engines, the control of black smoke in the exhaust can be achieved by:1) Running the engine at lower load.2) Maintaining the injection system perfect.3) Using Diesel fuel of higher Cetane number.Which of the above statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» C. 1 and 3 only | |
| 4. |
Pune-based organisation________ conducted a study using a 15% M - 15 methanol blend in vehicles and tested them for 3,000 km to evaluate emissions in real-world conditions as well as to check the performance of the vehicles. |
| A. | Automotive Research Association of India (ARAI) |
| B. | Research Association of India (RAI) |
| C. | Automotive Organisation (AO) |
| D. | Vehicle Organisation of India (VOI) |
| Answer» B. Research Association of India (RAI) | |