网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
A3海区船舶的双配套设备是指（）
A
所有设备x2
B
增加一套VHFDSC设备
C
增加一套VHFDSC和增加一套MF/HFDSC设备或INMARSAT船站
D
上述均可
参考答案
参考解析
解析：
暂无解析
更多 “单选题A3海区船舶的双配套设备是指（）A 所有设备x2B 增加一套VHFDSC设备C 增加一套VHFDSC和增加一套MF/HFDSC设备或INMARSAT船站D 上述均可” 相关考题
考题
单选题（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.A
anaerobic bacteriaB
aerobic bacteriaC
air bubblesD
disinfection chemicals
考题
单选题An underwriter is liable for（）.A
loss arising from the subject itself because of its inherent qualitiesB
loss caused by the ordinary evaporation of liquidsC
loss caused by heavy weatherD
the natural decay of the vessel due to the passage of time
考题
单选题Your kind attention to the above will be much（）.A
appreciateB
appreciatedC
appreciatingD
being appreciated
考题
单选题在气动避上限的自动回避临界转速回路中，若双气路控制的二位三通阀卡在上位（靠近控制端），则可能产生的现象是（）。A
只能加速到临界转速上限值B
只能加速到临界转速的下限值C
实际转速在临界转速区D
输出始终等于设定转速值
考题
单选题What is an advantage of using foam in fire fighting?（）A
It is effective in controlling fire in flowing oil such as coming from a broken fuel lineB
It absorbs heat from materials that could cause reignitionC
Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishmentD
Once the surface is blanketed with foam and the fire is extinguished，no further foam is required
考题
单选题某货舱舱容2380m3，按舱容比分配货重2450t，现拟配S.F分别为0.68m3/t和1.36m3/t的两种货物，则各自应配装（）t和（）t才可使其满舱。A
1300；1150B
1350；1100C
1400；1050D
1450；1000
考题
单选题The grip of a joint represents the（）.A
thickness of the connected membersB
diameter of the headC
entire length of the rivetD
diameter of the shank
考题
单选题AC C20网络型主机遥控系统中，当测量转速在某一预设时间范围内保持恒定时，调速系统将在指令控制下进入定油量控制模式。这种模式只适用于（）。A
低转速区间B
中转速区C
高转速区间D
临界转速区间
考题
单选题船舶电站中，自动准同步并车的并车条件所依据的脉动电压的特征，其正确的说法是（）。 ①脉动电压为0时，待并发电机的频率与电网频率相同； ②脉动电压周期越长，待并发电机与电网频率差越小； ③待并发电机与电网的相位差为0时，脉动电压应等于0； ④待并发电机与电网的频率差越小，脉动电压的周期越短； ⑤待并发电机的加、减速是由脉动电压大小来控制的； ⑥待并发电机的加、减速是由频率差的方向来控制的。A
①②③B
②③⑥C
③④⑤D
④⑤⑥
考题
单选题In a medium speed diesel engine, a trunk type piston may be cooled by（） Ⅰ.oil circulation though passages in the piston crown Ⅱ.heat transfer through piston rings and liner wallA
Ⅰ onlyB
Ⅱ onlyC
either Ⅰ or ⅡD
neither Ⅰ or Ⅱ
考题
单选题下列的辅锅炉水位双位控制方案中，不正确的是（）。A
电极室中设不同长度的电极棒B
采用气动差压变送器，从测量水位水压中去除蒸汽压力的影响，其输出控制压力继电器C
采用浮子开关D
采用压力继电器，其输入为测量水位水压
考题
单选题Floors aboard ship are（）.A
also called decksB
vertical transverse plates connecting the vertical keel with the margin platesC
large beams fitted in various parts of the vessel for additional strengthD
found in passenger and berthing spaces only
考题
单选题During the watch keeping at sea, at appropriate intervals inspection should be made of （）, auxiliary machinery and steering gear spaces by the duty engineer.A
the main propulsion plantB
lifesaving jacketsC
lifeboat engineD
state of emergency generator
考题
单选题Pump out No.2 port ballast tank to（）.A
keep vessel afloatingB
refloat vessel listing to portC
make vessel all-rightD
bring vessel upright
热门标签
最新试卷