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
The frequency 156.525MHZ and 156.8MHZ should be used in the band of（）.
A
MF
B
VHF
C
HF
D
LF
参考答案
参考解析
解析：
暂无解析
更多 “单选题The frequency 156.525MHZ and 156.8MHZ should be used in the band of（）.A MFB VHFC HFD LF” 相关考题
考题
以下哪个参数可以调整2A事件触发的难易度()
A.Absolute Threshold of the Quality ofthe Currently Used FrequencyB.Absolute Threshold of the Quality ofthe Non-used FrequencyC.HysteresisD.Weight of the Currently Used Frequency
考题
以下哪个参数可以调整1C事件触发的难易度()
A.Reporting Range ConstantB.WeightC.HysteresisD.Threshold used frequency
考题
In the event of fire in a machinery space，______.A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failedB.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishmentC.water in any form should not be used as it will spread the fireD.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel
考题
When can routine communications be resumed on a frequency or channel on which radio silence has been imposed ________．A.After determining that the frequency or channel appears to be no longer in useB.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsC.After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedD.Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
考题
When collecting condensation for drinking water，______．A.A sponge used to mop up and store condensation must be kept salt freeB.Only condensation on the bottom of the canopy should be collectedC.It should be strained through a finely woven clothD.Chlorine tablets should be used to make it drinkable
考题
If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies, which frequency should you call on ?______.A.Calling frequencyB.Distress frequencyC.Urgency frequencyD.Working frequency
考题
以下哪个参数可以调整2A事件触发的难易度（）A、Absolute Threshold of the Quality ofthe Currently Used FrequencyB、Absolute Threshold of the Quality ofthe Non-used FrequencyC、HysteresisD、Weight of the Currently Used Frequency
考题
Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）A、The power supply is faulty and should be replaced.B、The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.C、The radio frequency interference （RFI） is being received as noise.D、A plasma display is emitting infrared noise.
考题
A new department is formed and a new section of the building is being built out for them. All 50 new employees will need access to the wireless network. Which of the following should be completed to allow these new employees access to the wireless network?（）A、Frequency settings should be changedB、Additional WAPs should be installedC、Channels should be changedD、VLANs should be added
考题
What is used to prevent ‘ping-pong effects’, that is, rapid, successive handovers? （）A、Discontinuous TransmissionB、HysteresisC、Dynamic Power ControlD、Frequency HoppingE、Cell Load Sharing
考题
以下哪个参数可以调整1C事件触发的难易度（）A、Reporting Range ConstantB、WeightC、HysteresisD、Threshold used frequency
考题
Which of the following commands should be used to report statistics on network protocols used by the system？（）A、 lsattrB、 pstatC、 netstatD、 ifconfig
考题
单选题When collecting condensation for drinking water，（）.A
a sponge used to mop up and store condensation must be kept salt freeB
only condensation on the bottom of the canopy should be collectedC
it should be strained through a finely woven clothD
chlorine tablets should be used to make it drinkable
考题
单选题When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）A
After determining that the frequency or channel appears to be no longer in useB
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsC
After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedD
Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
考题
单选题When can routine communications be resumed when radio silence has been imposed?（）A
After determining that the frequency or channel appears to be no longer in useB
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsC
Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedD
If，in the Master's opinion，communications on that frequency will interfere with emergency communications
考题
单选题If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies，which frequency should you call on? （）A
Calling frequencyB
Distress frequencyC
Urgency frequencyD
Working frequency
考题
单选题What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? （）A
No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequencyB
The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was receivedC
The Operator should immediately set continuous watch on VHF channel 70D
The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received
考题
单选题Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）A
The power supply is faulty and should be replaced.B
The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.C
The radio frequency interference （RFI） is being received as noise.D
A plasma display is emitting infrared noise.
考题
单选题When it is accepted to remain on the frequency indicated，you should say（）.A
Standing by on VHF frequencyB
Coming to VHF frequencyC
VHF frequency. is the best place for you to stay byD
remaining in frequency. and do not change
考题
单选题To increase the frequency of an operating AC generator, you should （）A
increase the field excitationB
decrease the field excitationC
increase the number of magnetic polesD
increase the speed of the prime mover
考题
单选题The frequency 518KHZ will be used to transmit（）and（）wanings in NAVTEX.A
navigational / typhoonB
traffic / meteorologicalC
marine / hurricaneD
navigational / meteorological
考题
单选题Diesel engines driving alternators operating in parallel must maintain set frequency regardless of load changesThe governor characteristic used to accomplish this is known as （）A
actuationB
sensitivityC
compensationD
thrust shaft
考题
单选题An alternator switchboard has a synchroscope and synchronizing lamps, if the synchroscope is broken, which of the steps listed is the most essential before an alternator can be paralleled with the bus （）A
The breaker should be closed when one synchronizing lamp is dark and the other is brightB
The breaker should be closed when both synchronizing lamps are brightC
The frequency meter should be used to determine that the incoming alternator frequency is slightly higher than the busD
A portable phase sequence indicator must be used to verify the information from the lamps
考题
单选题What is NOT a requirement for testing the line throwing appliance on a vessel? （）A
The appliance should be tested every three monthsB
A regular service line should be used when testingC
A regular projectile should be used when testingD
An entry about the test must be made in the Official Log Book
考题
单选题Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）A
If no answer is received on the designated distress frequencies，repeat the distress call on any frequency availableB
Channel 16 (156.8) may be used for distress messagesC
It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds durationD
Distress messages should first be transmitted on 2182 kHz
考题
单选题When used with reversing reduction gears, medium-speed diesel engines should be bolted to their foundations with fitted bolts at the drive end and clearance(loosely fitted) bolts in other locations √This is done to （）A
maintain alignment when the ship’s hull is working in heavy seasB
ensure engine vibrations correspond to the natural frequency of the hullC
permit the engine to expand away from the driven equipment as the engine heats up and expandsD
maintain engine thrust bearing clearances
热门标签
最新试卷