Which of the following statements is more relevant in the context of IC engines?
1
Compression ratio of the fuel-air mixture is in the range of 6 to 10 in Spark Ignition (SI) engines.
2
Compression ratio for air is in the range of 16 to 20 for SI engines.
3
Walls of the engine cylinder of SI engines need to be thicker than CI engines.
4
Compression Ignition (CI) engines have lesser weight than SI engines.
5
None of the above