单选题具有大、小液压泵的自动绞缆机在系泊期间()。A只有大液压泵工作B大、小液压泵同时工作C只有小液压泵工作D小液压泵与蓄能器配合工作
单选题
具有大、小液压泵的自动绞缆机在系泊期间()。
A
只有大液压泵工作
B
大、小液压泵同时工作
C
只有小液压泵工作
D
小液压泵与蓄能器配合工作
参考解析
解析:
暂无解析
相关考题:
单选题Excessive piston ring wear in a diesel engine will cause()Ahigh lube oil viscosityBincreased lube oil consumptionClow lube oil temperaturesDhigh firing pressures
单选题In a central cooling system, used in some modem ships, sea water is supplied to cool ()which will circulate to other individual cooler, greatly reducing the corrosion problems.Amain bearingsBsea waterCcooling oilDlower temperature fresh water
单选题某船吃水5.25m时排水量Δ=6842t,TPC=11.74t/cm,从ρ=1.020t/m3的港口装货驶往最大吃水5.23m且ρ=1.005t/m3的目的港,途中油水消耗共117t,则该轮出发时允许最大平均吃水约为()m。A5.42B5.22C5.24D5.36
问答题某轮伙食冰机故障 配置为:两台由DAIKININDUSTRIESLTD.生产的6C552A-F压缩机,使用冷剂为:R22。 该轮自1994年下水投人营运后,虽然偶尔出现过几次伙食冰库温度异常现象,但总体上说系统工作正常。2002年7~8月份,两次补充使用国产冷剂后,冰库系统均出现不同程度的异常现象,尤以第二次为甚。主要表现为: (1)吸人、排出压力比平常低(分别为0.03~0.05MPa和0.9~1MPa); (2)压缩机吸入阀处结霜或结冰,进而发展到吸入阀处无冰凉感觉; (3)低温库达不到要求的一l8℃,只能在一12℃左右徘徊,严重时只能维持在一8℃左右。 (4)随后,高温库也出现异常现象。制冷系统的日常管理应加以注意的几个事项
单选题If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be ()Aa glazed surface on the springBnicks in the protective coatingCa build up of sludge depositsDcracks in the surface of the spring
单选题If you are transmitting a distress message by radiotelephone you should().Ause English languageBalways use the International CodeCpreface it by the word IntercoDfollow the transmission with the radio alarm signal
单选题All of the following steps are taken in starting a centrifugal pump,EXCEPT to().Aset the relief valveBcheck the lubrication systemCvent the pump casingDopen the pump suction and discharge valves
单选题我国《防止船舶污染海域管理条例》规定,150总吨及以上的油轮和400总吨及以上非油轮(但小于1万总吨),可不配备下列哪种防污设备()。A机舱污水和压载水分别使用不同管系,并设置污油储存舱B装有油水分离设备或过滤系统C装设标准排放接头D装有排油监控装置
单选题Galvanizing would be suitable for protecting wire rope which is used for().Acargo runnersBstaysCtopping liftsDAll of the above
单选题在北半球,船舶处于右半圆,观测到风向呈顺时针变化时抛抗台八字锚,应:().A先抛左锚,后抛右锚,出链左长右短B先抛右锚,后抛左锚,出链左长右短C先抛左锚,后抛右锚,出链右长左短D先抛右锚,后抛左锚,出链右长左短
单选题During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?()Afailure of the proper operation of the main steering gearBfailure of the proper operation of electrical installationsCleakage of domestic water pumpDinsulation of exhaust pipes in engine room contaminated by oil