
【名词&注释】
热处理(heat treatment)、机械性能(mechanical properties)、进出口(import and export)、一般性(general)、救生筏(life raft)、轮机员(engineer)、面粗糙度(surface roughness)
[单选题]对于新造船或新购置活塞,轮机员(engineer)除对活塞的尺寸、形状和表面粗糙度(surface roughness)做一般性检验外,还应对活塞的_______进行检验
A. 位置精度
B. 材料和热处理工艺
C. 机械性能
D. 外观状况
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举一反三:
[单选题]对气阀导管的错误说法有( )。
A. 导管承受气阀侧推力
B. 承担气阀散热
C. 导管过度磨损导致阀壳或缸盖报废
D. 润滑要采用柴油或煤油稀释的滑油
[单选题]海图底质注记中,“沙泥”表示:()
A. 分层底质,上层为沙,下层为泥
B. 分层底质,上层为泥,下层为沙
C. 沙的成分多于泥的成分的混合底质
D. 泥的成分多于沙的成分的混合底质
[单选题]In the presence of an open flame or hot surfaces, chlorinated flourocarbon refrigerants decomposes and form .
A. petroleum crystals
B. phosgene gas
C. water vapor
D. carbon monoxide
[单选题]救生筏中备有海锚两只,存放布置的要求是()
A. 两只海锚都存放在备品袋中,以便于安全可用用
B. 一只存放在备品袋中、一只存放在进出口的专用袋中便于立即可
C. 一只存放在备品袋中,另一只系在筏的进出口,随着筏的充账而抛放入水
[单选题]This windlass ________ now
A. has repaired
B. is under repair
C. was repaired
D. has been repaired
[单选题]If a used lube oil analysis indicates excessive chromate content, this means
A. air filtration is inadequate
B. engine coolant is leaking into the lube oil
C. fuel oil is leaking into the lube oil
D. the piston rings are excessive worn
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