单项选择题

Which of the listed pre-start procedures should be carried out prior to starting a crosshead type diesel engine after an overhaul?（）

A.Pre-lube cylinders with hand cranks
B.Open all air space drain cocks
C.Open all indicator valves
D.All of the above

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单项选择题

A.low exhaust temperature
B.low exhaust pressure
C.mechanical knock in each cylinder
D.black or gray exhaust smoke

单项选择题

A.swept volume of the cylinder
B.inside diameter of the cylinder
C.piston displacement in the cylinder
D.length of the piston stroke

单项选择题

A.Advanced ignition
B.Clogged air intake
C.Leaky exhaust valve
D.High exhaust pressure