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海船船员考试 问题列表
问题
单选题Under normal conditions, the refrigerant enters the compressor in an operating refrigeration system as a ().A
liquidB
dry saturated gasC
wet saturated gasD
superheated vapor
问题
单选题When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be ().A
dryB
wetC
super-cooledD
superheated
问题
单选题船舶空调装置冬季为控制舱内湿度适合,以下各项中正确的是()。A
送风湿度控制在40%~50%B
送风湿度控制在30%~40%C
气温高于0~5℃一般不加湿D
气温越高加湿量应越大
问题
单选题The phrase when built in the certificate of vessel’s nationality definitely means().A
when was your vessel builtB
at what time is your vessel buildingC
when is your vessel builtD
at what time you built your vessel
问题
单选题当柴油机转速增加时,在下述变化中正确的是() ①喷油正时不变; ②喷油延迟角加大; ③喷油提前角增大; ④单位凸轮转角的喷油量减小; ⑤供油提前角增大; ⑥喷油持续角增大。A
①+②+③B
①+③+⑤C
①+③+④D
②+④+⑥
问题
单选题海上拖带时,拖航速度的确定与什么有关()?A
船长、排水量、拖缆强度B
船宽、排水量、拖缆强度C
型深、排水量、拖缆强度D
主机马力、排水量、拖缆强度