(Piston area)X(Piston stroke)K(numbers of the cylinders)=engine（） ["brake horsepower","displacement","cylinder volume","cylinder clearance"]
Each fire pump on a tanker must have a pressure gauge located at（）. ["the pump discharge","the manifold connection","each fire station discharge","the pump statio"]
什么是配电变压器的“三位一体”接地方式？为什么采用这种接地方式？
During oil transfer operations，who is responsible for ensuring that the posted transfer procedures are followed?（）. ["The designated person in charge","The tankerman","The senior able seaman","The oiler"]
Which of the listed conditions will affective pressure the most in the cylinder of a diesel engine?（） ["TBN of the lubricating oil","Temperature of the lube oil","Completeness in the mixing of the fuel and air","Temperature of the cooling (sea) water"]
确定电子清纱器的原理，它和机械式清纱板相比有何优缺点？
