单选题为防硫酸钙大量生成,通常控制真空沸腾式海水淡化装置盐水含盐量为海水()倍。A1.1~1.3B1.3~1.5C2D3~4
单选题
为防硫酸钙大量生成,通常控制真空沸腾式海水淡化装置盐水含盐量为海水()倍。
A
1.1~1.3
B
1.3~1.5
C
2
D
3~4
参考解析
解析:
暂无解析
相关考题:
单选题On a ship,a fire pump may be used for other purposes if().Athe other services are run off a reducing station with a pressure gageBa separate fire pump is available for use on the fire mainCall other services are operated by a manifold near the pumpDAll of the above
单选题How must each storage tank for helicopter fuel on a ship be marked?()ADANGER - KEEP AWAYBDANGER - EXPLOSIVE VAPORSCDANGER - NO SMOKINGDDANGER - FLAMMABLE LIQUID
单选题Steering gears can be arranged with hydraulic control equipment known as a (), or with electrical control equipment.AtelemeterBtelemanometerCtelemotorDtelemometer
单选题When installed for bilge pumping or ballast duty, centrifugal pumps require a () to remove air from the suction pipe.Aair chamberBhead lankCprimerDprime mover
单选题Which of the following is not a factor which can interfere with the pulse of sound and cause a variation the depth reading?()AsalinityBtemperatureCthe hydrostatic pressureDVessel’s speed
单选题In a radial piston pump, reversal and control of fluid flow are accomplished by moving the ().Acentral valveBradial plungerCfloating ringDcylinder body
单选题PSC程序中,低标准船的判别和滞留的依据是()。 Ⅰ、船体、机器和设备或操作安全确实低于相应公约规定的标准 Ⅱ、配员不符合最低安全配员证书 Ⅲ、管理不善造成船舶或设备的实质性受损AⅠ+ⅡBⅠ+ⅢCⅡ+ⅢDⅠ+Ⅱ+Ⅲ
单选题船舶具有下列哪些行为时,登记机关给予警告、罚款直至没收船舶登记证书()。 Ⅰ.假冒中国国籍,悬挂中国国旗航行; Ⅱ.办理登记时弄虚作假; Ⅲ.隐瞒事实,重复登记; Ⅳ.涂改船舶登记证书。AⅠ~;ⅣBⅡ~ⅣCⅠ~ⅢDⅠ、Ⅲ、Ⅳ
单选题() may be the first possible cause which makes the engine to lose power or slow down when it is running.AHot bearingBStarting valvesCUnequal distribution of loadDExcessive crankshaft clearance
单选题当船上加装压载水时,压载水操作记录簿应记录的内容有()。 Ⅰ、加装日期、时间;Ⅱ、估计加装的数量m3;Ⅲ、加装地点(港口和经纬度); Ⅳ、加装时天气;Ⅴ、加装压载舱编号;Ⅵ、加装水域的水深(若在港外)。AⅠ+Ⅱ+Ⅲ+ⅣBⅠ+Ⅱ+Ⅲ+ⅤCⅠ+Ⅱ+Ⅲ+ⅥD以上全部
单选题双杆作业时,舷内吊杆稳索下端系结点应尽量高一些,使稳索仰角()。A越大越好B越小越好C接近90度D大于90度