Q. Generally speaking for better efficiency of IC engine the valves must (Solved)
1. open before the beginning of a stroke and close before the end of a stroke
2. open after the beginning of a stroke and close before the end of a stroke
3. open after the beginning of a stroke and close after the end of a stroke
4. open before the beginning of a stroke and close after the end of a stroke
5. None of the above
- d. open before the beginning of a stroke and close after the end of a stroke