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单选题
船舶锚设备需定期检查保养，磨损检查时，检查环与环的接触处和锚链与锚链筒的摩擦处，用卡尺量其同一截面的最大、最小直径，取平均值；I类航区，若发现链环直径小于原规定直径的（）就应换新。
A
85%
B
86%
C
87%
D
88%
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更多 “单选题船舶锚设备需定期检查保养，磨损检查时，检查环与环的接触处和锚链与锚链筒的摩擦处，用卡尺量其同一截面的最大、最小直径，取平均值；I类航区，若发现链环直径小于原规定直径的（）就应换新。A 85%B 86%C 87%D 88%” 相关考题
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单选题关于转叶式液压舵机的组成，下列哪种说法正确（） ①由转舵机构和动力源两大部分组成； ②最关键问题是回转体的密封； ③回转体所有小舱室最终形成两条油路。A
①②③；B
②；C
①②；D
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考题
单选题Due to the nature of a vessel’s construction for a particular trade，it does not fully comply with the provisions of SOLAS. Where will this be indicated?（）.A
On the Exemption CertificateB
On the reverse of the particular SOLAS certificate affectedC
On the face of the Certificate of InspectionD
Nowhere； the vessel must comply to engage in international trade
考题
单选题The purpose of the purge valve at the top of the condenser in a refrigerating system is to（）A
remove any air that may accumulate in the systemB
take out unpleasant fumes from the refrigerantC
vent off excess refrigerant in an emergencyD
permit opening the refrigerating system for cleaning and inspecting
考题
单选题How about deducting 10 bundles，（）is to say 50 bundles partly rusty?A
itB
thisC
thatD
which
考题
单选题The lower end of each piston rod is reduced in diameter to fit a bore in the cross-head, this being secured to the piston rod by （）.A
a boltB
a capC
a discD
a nut
考题
单选题（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.A
Half lengthB
Mid-bodyC
Center lineD
Amidships
考题
单选题The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.A
specific gravityB
viscosityC
S E numberD
hydrolytic stability
考题
单选题A wobbling tail shaft is an indication of（）.A
shallow waterB
an engine that is misfiringC
a tight tail shaft glandD
worn stern bearing or misalignment
考题
单选题Every new crude oil tanker of 20000 tons deadweight and above and every new product carrier of 30000 tons deadweight and above shall be provided with（）.A
segregated ballast tanksB
moulded draught measurement systemC
additional ballast water systemD
dedicated clean ballast tanks system
考题
单选题GravinerMark-5型曲柄箱油雾浓度监视报警器中，测量系统的工作原理是基于（）。A
油雾浓度不同，透光程度不同B
油雾浓度不同，导热率不同C
油雾浓度不同，导电率不同D
油雾浓度不同，顺磁性不同
考题
单选题船厂对修理质量应负责，修理质量保质期为（）。A
固定件12个月，运动件6个月B
固定件6个月，运动件3个月C
固定件3个月，运动件1个月D
固定件12个月，运动件3个月
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