单项选择题
A.the cylinder cover is cracked B.the injector holes is clogged C.the cams are not properly set D.fuel pump is leaking
Blow-off of the relief valves of the engines cylinders ...
单项选择题Blow-off of the relief valves of the engines cylinders may be caused by （）.
A.too low lead B.water in fuel C.too tight spring D.leakage
Before starting the turning gear, （） should be worked b...
单项选择题Before starting the turning gear, （） should be worked by hand to minimize corrosive action on the liners.
A.the indicators B.the starting valves C.the cylinder lubricators D.the turning gear
Before starting the engine the air bottle should be （）....
单项选择题Before starting the engine the air bottle should be （）.
A.pumped up B.loaded C.discharged D.opened
