MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 of the following is not a factor for ring selection? |
| A. | Scavenging ratio |
| B. | Dimensions of engine block |
| C. | Piston design |
| D. | Piston displacement |
| Answer» B. Dimensions of engine block | |
| 2. |
What is the minimum number of compression rings required in an engine? |
| A. | 5 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 3. |
Which are the other materials added to cast iron in the manufacturing of piston ring? |
| A. | Aluminum and phosphorus |
| B. | Silicon and aluminum |
| C. | Silicon and manganese |
| D. | Cadmium and phosphorus |
| Answer» D. Cadmium and phosphorus | |
| 4. |
What is the reduction of gas leakage in a gapless type ring? |
| A. | 40-50 |
| B. | 10-20 |
| C. | 50-60 |
| D. | Has no effect |
| Answer» C. 50-60 | |
| 5. |
What is the range in millimeter of the end gap for the top compression ring per 25mm of bore size? |
| A. | 0.01-0.04 |
| B. | 0.04-0.07 |
| C. | 0.07-0.12 |
| D. | 0.12-0.15 |
| Answer» D. 0.12-0.15 | |
| 6. |
Which of the following is not an advantage of reducing the ring width? |
| A. | Machining the narrow grooves |
| B. | Better resistance to ring scuffing |
| C. | better resistance to ring flutter |
| D. | Ring inertia are reduced |
| Answer» B. Better resistance to ring scuffing | |
| 7. |
Which of the is caused due to excess of end gap? |
| A. | Blow by and rapid wear |
| B. | Scuffing and rapid wear |
| C. | only rapid wear |
| D. | Both blow bye and scuffing |
| Answer» E. | |
| 8. |
Which among the following type of piston ring is used for worn-out cylinders? |
| A. | Delay action scraper ring |
| B. | Composite rail scraper ring |
| C. | Multi-piece oil control ring |
| D. | Carbo glide ring |
| Answer» C. Multi-piece oil control ring | |
| 9. |
Which of the following is not a factor for scuffing? |
| A. | Proper protecting lubrication film |
| B. | Overheated engine |
| C. | Insufficient clearance |
| D. | Lack of lubrication |
| Answer» B. Overheated engine | |
| 10. |
Which among the following is defined as percentage gap collapse when the ring closed to nominal cylinder diameter for 6 hrs at 350 degrees centigrade? |
| A. | Thermal set |
| B. | Pulse width |
| C. | Base pulse width |
| D. | Enthalpy |
| Answer» B. Pulse width | |
| 11. |
Which of the following is provided to make up for the cylinder wear? |
| A. | Ring expander |
| B. | Temperature sensor |
| C. | Pressure relief valve |
| D. | Crankcase ventilation |
| Answer» B. Temperature sensor | |
| 12. |
Which among the following is not a function of the piston rings? |
| A. | To seal the high-pressure gases |
| B. | Easy passage for the heat to flow from crown to cylinder |
| C. | Maintain sufficient lubrication |
| D. | Helps in detonation |
| Answer» C. Maintain sufficient lubrication | |