Working cycles for internal combustion engines include 2 stroke and 4 stroke ________ ignition and _______ ignition.

Working cycles for internal combustion engines include 2 stroke and 4 stroke ________ ignition and _______ ignition.

Working cycles for internal combustion engines include 2 stroke and 4 stroke ________ ignition and _______ ignition.


a) Heat
b) Spark
c) Compression
d) Flash


Answer: bc


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