单选题 Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the_____.

单选题 The load sharing characteristics of two diesel generators operating in parallel are mostly dependent on their governor_____.

单选题 For the diesel engine, the operation between two fuel oil injections is called a_____, which consists of a fixed sequence of events.

单选题 The quantity of oil injected into the cylinder can be regulated_____.

单选题 Sealing between the crankcase and scavenging air boxes is achieved by means of the piston rod_____ located in the bottom of the scavenging air boxes.

单选题 Before the lubricating oil is entered into the system again, it must be purified by the_____ in the drain tank.

单选题 The connecting rod is fitted between the crosshead and the crankshaft. It transmits the firing force, and together with the crankshaft converts the_____ motion to a_____ motion.

单选题 Piston crowns are of the dished type to provide_____ between the piston crown and the cylinder head.