单项选择题

Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the（）

A.cooling water leaving each cylinder
B.fuel oil entering the injector
C.exhaust gases at various locations
D.lube oil at the bearing supplies

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单项选择题

A.low water in the expansion tank
B.improperly seated valves
C.low fuel oil pressure
D.worn or broken cylinder liner sealing rings

单项选择题

A.exhaust
B.fuel oil
C.cooling water
D.cylinder liner

单项选择题

A.improperly seating intake valves
B.leaking cylinder liner seal rings
C.late fuel injection timing
D.carbon deposits on the piston