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    				| 1. | What do you understand by engine cylinder and spark plug with regard to piston engine? | 
| Answer» The engine cylinder and spark plug with regard to piston engine : (a) Engine cylinder: It provides the housing for the piston to move up and down during various strokes. (b) Spark plug: It is fitted on the cylinder head to give spark at the plug points to ignite the mixture in the cylinder. | |