One of the purposes for water cooling the exhaust manifold in marine diesel engine is to ()
A、reduce lube oil temperature
B、raise exhaust temperature reduce
C、excessive heating of engine room
D、reduce load on cooling water pump
A、reduce lube oil temperature
B、raise exhaust temperature reduce
C、excessive heating of engine room
D、reduce load on cooling water pump
A、can fit any size hose B、converts a stream of water into a fog C、increases the amount of water reaching the fire D、can spray two streams of water at the same time
A、help preheat the air for the furnaces B、help preheat the feedwater C、protect economizer from excessive heat D、prevent excessive furnace heat losses
A、containers are classified as general purpose (dry cargo) container and specific purpose container B、general purpose container (GP) is suitable for the widest varieties of cargo C、specific purpose container is suitable for the specific cargo D、bulk container, reefer container, open-top container are all general purpose containers
A、containers are classified as general purpose (dry cargo) container and specific purpose container B、general purpose container (GP) is suitable for the widest varieties of cargo C、specific purpose container is suitable for the specific cargo D、bulk container, reefer container, open-top container are all general purpose containers
A、the purpose of trimming B、the approval for ballast C、the purpose of voyage D、the approval for operation
A、describes a change to the OSPF hello timer B、carries one or more link-state advertisements C、establishes and maintains neighbor relationships D、describes the contents of the entire link-state database
A、A.half the resistance of the other resistor B、B.a resistance equal to the other C、C.at least ten times the resistance of the other D、D.a partial short circuit
A、one meter from the tank bottom and one meter below the tank top B、one half the ullage of the tank and one meter below the tank top C、one half the ullage of the tank and one meter above the tank bottom D、at three meter intervals from the tank top to the bottom
A、one meter from the tank bottom and one meter below the tank top B、one half the ullage of the tank and one meter below the tank top C、one half the ullage of the tank and one meter above the tank bottom D、at three meter intervals from the tank top