Coolant can be lost from a diesel engine jacket cooling waster system by leakage from()
A、cylinder head cracks
B、piping joints
C、pump leaking
D、all of the above
A、cylinder head cracks
B、piping joints
C、pump leaking
D、all of the above
A、low coolant temperature B、insufficient fuel C、high ambient temperature D、carbon buildup on the injector tips
A、low oil pressure B、high coolant pressure C、leaking fuel injector D、cracked cylinder head or liner
A、A.clogged coolant passages B、B.a leaking cylinder head gasket C、C.low fuel oil pressure D、D.worn or broken cylinder liner sealing rings
A、A.air in the cooling system B、B.an overhauled water pump C、C.correct amount of coolant D、D.no air in the cooling system
A、A.Because voice data packets must follow a single dedicated path through the network B、B.Because voice data packets should arrive quickly and sequentially, and with no lost data C、C.Because lost voice-data packets must be retransmitted D、D.Because data does not need to arrive intact, so data transfer rates can be variable
A、A.Because data does not need to arrive intact, so data transfer rates can be variable B、B.Because lost voice-data packets must be retransmitted C、C.Because voice data packets should arrive quickly and sequentially, and with no lost data D、D.Because voice data packets must follow a single dedicated path through the network
A、The coolant temperature must be maintained at 180℃ B、The thermostatic bypass valves must be manually opened before the engine is started C、The pressure cap must be removed while the engine is secured D、Electrical power to the heater must be secured before the cooling system is drained