单项选择题
Load control on a diesel engine is accomplished by （）.
A.regulating the speed of the turbocharger B.rotating the fuel injector pump plunger C.regulating the speed of the fuel oil transfer pump D.changing engine timing
单项选择题 When reassembling the bowl of a disk-type centrifuge, the bowl or locking ring is rotated （）.
单项选择题 In diesel engines designed with a crosshead, the motion of the piston rod can be described as （）.
单项选择题 Immediately after any diesel engine is started, the engineer should check the （）
