Piston cooling fins are located ______. A: at top the piston crown B: beneath the piston crown C: at the base of the piston skirt D: inside the cylinder liner<br/>cooling water jacket

It is _____ at the top of the piston. A: thick B: thin C: big D: small

piston

The piston is fitted with _____piston rings. A: four B: three C: two D: one

The process of loop scavenge is that the exhaust will be via ports （） the air ports and controlled by the same piston.

The lower end of each piston rod is reduced in diameter to fit a bore in （）， this being secured to the piston rod by a nut.

Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）

The energy for pushing this piston up can be supplied from （）， so that the piston can keep moving up and down.

The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.

The lower section of a piston is called the （）.