【名词&注释】
有效性(effectiveness)、收缩压(systolic pressure)、正常成年人(normal adult)、主管机关(competent authorities)
[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may be _____.
A. failure of the fuel pumps
B. starting air pressure too low
C. stop valve in air line closed
D. the turning gear still engaged
查看答案&解析
举一反三：
[单选题]《符合证明》的有效性服从于由主管机关(competent authorities)认可的机构执行____。
A. 初次审核
B. 年度审核
C. 中间审核
D. 换证审核
[单选题]Which of the following is NOT mentioned in this passage?
A. There may be oil vapor in the engine room
B. Pipes and fittings may be damaged if explosion takes place
C. The cooler should be drained
D. Bursting caps must be fitted
[单选题]Usually, emergency electricity supplies to_______on board
A. Cargo winch
B. Windlass
C. Steering gear
D. Main air compressor
[单选题]正常成年人收缩压为______。
A. 90～140mmHg
B. 60～80mmHg
C. 140～160mmHg
D. 20～30mmHg
[单选题]A crack in a cylinder liner can be caused by
A. worn piston rings
B. installation of undersized sealing rings
C. operating the engine at low loads
D. restricted cooling water passages
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