【名词&注释】
中心线(center line)、轮机长(chief engineer)
[单选题]有毒液体物质残余物排放时，对于非自航船船速要求是?()
A. 至少7kn
B. 至少4kn
C. 少于7kn
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举一反三：
[单选题]The desirable properties of a marine fuel oil should include .
A. high flash point and high viscosity
B. low flash point and high viscosity
C. low heating value and high sulphur content
D. high heating value and low sulphur content
[单选题]Which of the following conditions is true concerning a flammable liquid with a concentration above the upper explosive limit?
A. The mixture is too lean to burn
B. The mixture is too rich to burn
C. The vapor is about to explode
D. Conditions are perfect for combustion
[单选题]Besides Yokohama, M. V. Gaohe will also ________ at some other Japanese ports
A. call
B. visit
C. get
D. reach
[单选题]某轮陀螺罗经航向为030°，已知罗经差为2°W，求该轮所驶真航向：()
A. 032°
B. 028°
C. 32°
D. 28°
[单选题]保持船级的水管锅炉的内部检验每______年内不少于______次，最大间隔期不超过______年。
A. 8/3/3
B. 5/2/3
C. 8/2/4
D. 5/3/2
[单选题]船舶的报警系统一般由_______负责，由_______负责维修。
A. 船长∕轮机长
B. 大副∕大管轮
C. 三副∕三管轮
D. 三副∕电机员
[单选题]_______应与活塞中心线垂直相交，垂直度要求不大于0.025mm/100mm，位置度要求：活塞直径200mm时应不大于0.10mm；活塞直径＞200mm时应不大于0.20mm
A. 环槽平面
B. 活塞销孔中心线
C. 曲轴中心线
D. 活塞顶面
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