单选题气缸注油量随转速而调节的主要缺点是（）。A气缸油注油器传动机构复杂B低转速工作时注油量过小C低负荷运转时注油量过大D低转速运转时注油量不稳定
单选题
气缸注油量随转速而调节的主要缺点是（）。
A
气缸油注油器传动机构复杂
B
低转速工作时注油量过小
C
低负荷运转时注油量过大
D
低转速运转时注油量不稳定
参考解析
解析：
暂无解析
相关考题：
单选题Strainers are commonly used in hydraulic systems to （）.Aprotect the pump from fine soluble contaminantsBprevent solid particles from entering the pumpCprevent solid particles from entering the filterDprotect the directional control valves
单选题Why is it necessary to warn engine room personnel before activating the fixed CO2 system?（）ATo make them aware there is a fireBTo let them know they should leave the engine roomCTo prevent possible injury from frostbiteDTo make them aware that ventilation will automatically stop
单选题下列有关主管轮机员在加油时不正确的说法是（）A检查装油管系，正确开关阀门，防止跑冒滴漏B核实供油方的油品质量和数量C确定各种油品的装油次序和供油速度D规定好双方的联系信号，以供油方为主，切实执行
单选题How should you signal the crane operator to raise the boom and lower the load?（）.AExtend arm with the palm down and and hold this position rigidlyBPlace both fists in front of the body with the thumbs pointing outward each otherCClasp hands in front of you bodyDExtend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired
单选题根据1976年商船最低标准公约规定，船东应对海员按协议服务期间发生的疾病、受伤、死亡负责，其除外情况包括（） Ⅰ．并非在船上工作时的受伤； Ⅱ．海员自身故意； Ⅲ．海员违章； Ⅳ．海员受雇时拒绝进行体检； Ⅴ．签约时已发生但未发现的疾病。AⅠ、ⅢBⅠ、Ⅱ、ⅢCⅠ、Ⅱ、Ⅲ、ⅣDⅠ、Ⅱ、Ⅲ、Ⅳ、Ⅴ
单选题交货记录是集装箱运输经营人与收货人或其代理人之间共同签署的文件，其主要作用有（）。Ⅰ．证明货物已经交付；Ⅱ．证明货物交付时的状况；Ⅲ．证明收货人对货物的责任已经开始；Ⅳ．证明运输经营人对货物的责任已告终止。AⅠ，Ⅱ，ⅣBⅡ～ⅣCⅠ～ⅣDⅠ～Ⅲ
单选题A vessel casualty must be reported to the MSA in China if it involves（）.Aloss of lifeBan injury requiring only first aidCproperty damageDloss of equipment which doesn't reduce the vessel's maneuverability
单选题Every（）shall be fitted with a cargo tank cleaning system using crude oil washing.Aexisting crude oil tanker of 20000 tons deadweight and underBnew crude oil tanker of 20000 tons deadweight and underCexisting crude oil tanker of 20000 tons deadweight and aboveDnew crude oil tanker of 20000 tons deadweight and above
单选题《国际危规》定义的危险货物应同时具有（）。 Ⅰ.海洋污染性质； Ⅱ.能抵御海运一般风险，但若处理不当容易造成事故 Ⅲ.需要特别防护； Ⅳ.《国际危规》所列危险货物类别的性质。AⅠ，Ⅱ，Ⅲ，ⅣBⅢ，ⅣCⅡ，Ⅲ，ⅣDⅡ，Ⅳ
单选题In each inflatable liferaft，what equipment is provided to make quick，emergency，temporary repairs to large holes in the raft? （）ANo equipment is providedBGlue and rubber patchesCSeveral various-sized sealing clampsDSelf-adhesive rubberized canvas patches
单选题我国《钢质海船入级规范》对锚机规定：锚机链轮上的刹车装置应工作可靠，当自由抛锚速度达（）时，仍能有效刹住正在下滑的锚链。A5～7.5m/min；B5～7.5m/s；C8～9m/s；D8～9m/min。
单选题Pilot Station，this is Chinese ship Jinsha（）.Over.AcallsBcalledCcallingDcall