更多"[单选题]VHF用于（ ）
What is funcation of"的相关试题:
[单选题]HF系统用于（ ）
What is funcation of HF.
A.长距离通讯
Long distance communication
B.短距离通讯
Short distance communication
C.超长距离通讯
Super long distance commnication.
[单选题]includes.VHF系统包括（ ）
What parts of the VHF system
A.天线、 收发机 、 耦合器
Antenna,transceiver ,coupler
B.天线、收发机、控制面板
Antenna, transceiver and control panel.
C.天线 、耦合器、收发机、ACP
Antenna,coupler, transceiver and ACP.
[单选题]What is funcation of AMU?AMU的作用是（ ）
A.centralized All audio signal and frequency of communication system.集中通讯系统的所有音频信号及频率
B.The AMU acts as an interface between the users and the various radio
communication and navigation systems. 作为用户与各无线电通讯和导航系统的接口
C.Recive audio signal only.仅接收音频信号
[单选题]静电释放刷的作用是（ ）
What is funcation of the static discharger?
A.避免雷击
Avoid lightning
B. 减少静电随机释放给通讯，导航系统带来干扰
Avoid static electricity discharging noise and ensure a good quality of radio transmission and navigation, without interference.
C. 避免产生静电
Avoid static electricity.
[单选题] What does the abbreviation VHF stand for？
A. Vessel's Hoisting Flag
B. Very High Safety
C.Vessel's Homing Frequency
D. Very High Frequency
[单选题] What is the right way to use VHF CH16 and working channel?
A.Ships can call other ships on Ch16 but should move to a working channel as soon as possible.
B.Ship should use working channel to call other ships at any time.
C.Ch16 is only used as the international distress and calling frequency.
D.Ship can use Ch16 or working channel as they like
[单选题]VHF便携通信电台主要用于哪些方面（ ）。
A.塔台指挥
B.电磁环境测量
C.校飞
D.以上全是
[单选题]无线电的甚高频段VHF的频率范围是（ ），主要用于传送电视、调频广播、空中管制、车辆通信、导航、集群通信和无线寻呼等。
A.3Hz～30KHz
B.3Mz～30MHz
C.30～300KHz
D.0.3Hz～3MHz
[单选题]对于现场的局部放电探测，采用电气的VHF/UHF法，由于VHF/UHF信号衰减的结果，很多耦合器必须装在GIS内，两个相邻的耦合器之间的最大距离大约（）米。
A.几
B.几十
C.几百
D.几千
[单选题]VHF天线的数量：
A.2
B.3
C.4
D.1
[单选题] International distress signal in VHF calling for help is ______．
A.Help，Help，Help
B.Mayday，Mayday，Mayday
C.Save，Save，Save
D.Rescue，Rescue，Rescue
[单选题]VHF通信系统工作频率为：
A. 1030MHz及1090MHz
B.2MHz至29.999MHz
C.88MHz至108MHz
D.118.00MHz至136.975MHz
[单选题]勤务内话功能用于（ ）
What's the function of servic interphone?
A.客舱服务员与地面人员以及地面人员之间的通讯
Between the cabin crew and ground staff and ground staff communication
B.驾驶员与服务员之间的通讯
Between the pilot and the attendant communication
C.驾驶舱与飞机上勤务内话插孔之间以及客舱站位与勤务内话插孔之间的通讯
Enables voice communications between the SERVICE INTERPHONE JACKS, the cockpit
and the cabin stations.
[单选题]FAP上的LAV MAINT 按钮用于（ ）
What's the function of LAV MAINT pushbutton on FAP?
A.Tune on maintenance lights in the toilet. 打开厕所中的维护灯
B.Make the lights in toilet 50% bright.使厕所中的照明灯半亮
C.Make the lights in toilet 100% bright.使厕所中的照明灯全亮
[单选题]当VHF2收到一个选择呼叫时
A.VHF2键上的CALL灯琥珀色闪亮
B.VHF2键上的三个绿杠亮起
C.VHF2键上的白色CALL灯亮
D.VHF2键上的红色CALL灯稳亮；
[单选题]VHF-DSC使用的频道为 ?
A.VHF CH16
B.VHF CH70
C.VHF CH08
