Water Pump之中文名称为水泵.
Valve Seat之中文名称为气门头.
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Voltage之中文名称为电流.
Nozzle之中文名称为油道.
单选题The motor for the fresh water pump ().A need to repairB need to be repairedC needs to repairD needs repairing
单选题A water pump can not supply water after startingIt may be caused by ().A closed discharge valveB broken pipe lineC worn shaftD both A and B
单选题A centrifugal bilge pump requires priming ().A primarily to lubricate the shaft sealsB due to the inability of this type of pump to lift water to cover the suction (eye) of the impellerC to initially unload the pump by having its head pressure equal to discharge pressureD in order to overcome the potential energy of water in the discharge line
单选题The ()pump is usually used as the bilge feed pump to an oily water separator.A turbineB screwC vaneD ejector