更多"[单选题]( )Every A3 ship, while a"的相关试题:
[单选题]( )Every A3 ship, while at sea, shall maintain a continuous watch:
A.On VHF DSC channel 70
B.On the distress and safety DSC frequency 2,187.5 kHz and 8,414.5 kHz and also on at least one of the distress and safety DSC frequencies 4,207.5 kHz, 6,312 kHz, 12,577 kHz or 16,804.5 kHz, appropriate to the time of day and the geographical position of the ship
C.For satellite shore-to-ship distress alerts
D.All of these
[单选题]( )Every ship, while at sea, shall be capable of
A.transmitting and receiving search and rescue co-ordination communications
B.transmitting and receiving on-sence communications
C.transmitting and receiving bridge-to-bridge communications
D.A,
B, C are all right.
[单选题]( )If a ship is on fire in the Sea Area A3, which of the following equipments would be used to make ship-to-shore distress alerts?[
A.HF DSC
B.406MHZ EPIRB
C.INMARST-C
D.ALL of above
[判断题]4~20mA的标准信号分成五等分校验分别为0 mA、5 mA、10 mA、15 mA、20mA( )
A.正确
B.错误
[单选题]( )What is ship's heading? ship's heading is the direction .
A.the vessel is pointing.
B.the vessel is traveling relative to land
C.the vessel is traveling relative to ground
D.the vessel is drifting
[单选题] 带电气阀门定位器的调节阀校准一般选输入信号4 mA、8 mA、12 mA、16 mA、( )5个点进行校准。
A.18 mA
B.20 mA
C.22 mA
D.24 mA
[简答题]避雷器直流1mA电压U1mA及0.75U1mA下的泄漏电流，0.75U1mA下的泄漏电流不应大于 。
[单选题]输出范围为4mA-12mA-20ma的变送器，其基准值为（）。
A.8；
B.12；
C.16；
D.20。
[单选题]能让人感觉到的交流电流约1mA；交流5mA能引起轻度痉挛，交流达到（ ） mA时在较短的时间就能危及人的生命。 ( )
A.10
B.30
C.50
D.100
[单选题]1000kV金属氧化物避雷器直流1mA电压(U1mA)及在0.75U1mA下泄漏电流测量的基准周期为( )年。
A.1
B.2
C.3
D.4
[判断题]信号机工作电流 110mA -150mA（）
A.正确
B.错误
[判断题]测量金属氧化物避雷器0.75U1mA下漏电流时的U1mA电压值应选用U1mA实测值。
A.正确
B.错误
[单选题]对于工频电流人的感知电流为 0.5-1mA、摆脱电流为5-10mA、室颤电流约为 50mA。某事故现场如下图所示，电动机接地装置的接地电阻为 2Ω；该电动机漏电，流过其接地装置电流为 5A；地面十分潮湿。如果电阻 1000 Ω的人站在地面接触该电动机，最有可能发生的情况是（）。
A.引起该人发生心室纤维性颤动
B.使该人不能脱离带电体
C.使该人有电击感觉
D.使该人受到严重烧伤
[判断题]测量金属氧化物避雷器 0.75U1mA下漏电流时的U1mA电压值应选用U1mA初始值或制造厂给定的U1mA值。
A.正确
B.错误
