MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Automotive Engine Auxiliary Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which is the sensor used to sense the pressure of the common rail? |
| A. | Rail pressure sensor |
| B. | Mass airflow sensor |
| C. | Oxygen sensor |
| D. | Thermostat |
| Answer» B. Mass airflow sensor | |
| 2. |
How much amount in millimeter cube of fuel is injected in a pilot injection phase? |
| A. | 1 |
| B. | 2 |
| C. | 5 |
| D. | 7 |
| Answer» B. 2 | |
| 3. |
Which among the following is the correct full form of ECU? |
| A. | Electrical control unity |
| B. | Electrical control unit |
| C. | Electronic control unity |
| D. | Electronic control unit |
| Answer» E. | |
| 4. |
Which among the following is not a component of the common rail fuel injection system? |
| A. | ECU |
| B. | Injector |
| C. | Spark plug |
| D. | Electric fuel pump |
| Answer» D. Electric fuel pump | |
| 5. |
How many numbers of engine variables are individually controlled in a common rail fuel injection system? |
| A. | 1 |
| B. | 5 |
| C. | 7 |
| D. | 3 |
| Answer» E. | |
| 6. |
Which of the following valve guards the system against excess pressure? |
| A. | Pressure limiter |
| B. | Inlet |
| C. | Outlet |
| D. | Both inlet and Outlet |
| Answer» B. Inlet | |
| 7. |
Which of the following does not depend on the fuel quantity injected? |
| A. | System pressure |
| B. | Duration of injection |
| C. | Size and shape of the nozzle |
| D. | Alternator speed |
| Answer» E. | |
| 8. |
Which of the following is an example of a radial piston pump? |
| A. | Low-pressure pump |
| B. | High-pressure pump |
| C. | Common rail |
| D. | ECU |
| Answer» C. Common rail | |
| 9. |
Which of the following is not a property for injector open time duration? |
| A. | Density of fuel |
| B. | Dynamic compressibility |
| C. | Injection pressure |
| D. | Engine temperature |
| Answer» E. | |
| 10. |
How many times is the fuel being injected in one cycle of a modern automotive diesel engine? |
| A. | 5-7 |
| B. | 7-10 |
| C. | 4-5 |
| D. | 10-12 |
| Answer» D. 10-12 | |
| 11. |
In which type of injection mode the exhaust gas temperature for the regeneration of the particulate filter is increased? |
| A. | Pilot injection mode |
| B. | Retarded post ignition mode |
| C. | Main injection |
| D. | Double pre injection |
| Answer» C. Main injection | |
| 12. |
Which of the following helps in the increase of the engine torque at lower engine speeds? |
| A. | Throttle body injection |
| B. | The common rail injection system |
| C. | Port injection |
| D. | Retarded post-injection |
| Answer» C. Port injection | |
| 13. |
How are the injectors activated in a modern common rail fuel injection system? |
| A. | Spring |
| B. | Solenoid valve |
| C. | Rotor |
| D. | Motor |
| Answer» C. Rotor | |