更多"The frequency（）the safety message w"的相关试题:
[单项选择]If you wished to transmit a message by voice concerning the safety of navigation，you would preface it by the word（）.
A. Mayday
B. Pan-pan
C. Securite
D. Safety
[单项选择]The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.
A. Mayday
B. Pan
C. Safety
D. Interco
[单项选择]The frequency 518KHZ will be used to transmit（）and（）wanings in NAVTEX.
A. navigational / typhoon
B. traffic / meteorological
C. marine / hurricane
D. navigational / meteorological
[单项选择]It is possible for ships to receive safety message transmitted by Navtex station（）.
A. in any INMARSAT regions
B. in each NAVTEX area
C. at any distance
D. in Areas A3 and A4
[简答题]说明FSC报警点TRANSMIT-FAULT的含义。
[单项选择]CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）.
A. orbiting satellites in space
B. commercial radio stations
C. private，commercial，and military aircraft
D. ordinary radio stations
[单项选择]The frequency of the alternating current generated by a synchronous generator is governed by the speed and the（）
A. full excitation
B. load
C. power factor
D. number of poles
[单项选择]The radiotelegraphy safety messages for condition indicating distress，urgency and safety，respectively，are（）.
A. SOS，ZZZ，XXX
B. SOS，UUU，SSS
C. SOS，XXX，TTT
D. SOS，TTT，UUU
[单项选择]Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
A. increasing the volume of intake air
B. shutting off the fuel supply
C. increasing the engine back pressure
D. over-speeding the engine
[单项选择]The complying vessels can transmit ship-to-shore distress alerts by at least（）.
A. One means, whether satellite or terrestrial techniques
B. Two means, whether satellite or terrestrial techniques
C. Two separate and independent means, each using different radio communication services
D. Two means, such as MF DSC and HF DSC
[单项选择]For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
A. RCC
B. MCC
C. LUT
D. MRCC
[单项选择]When paralleling two AC generators, the frequency of the machine coming on-line, immediately prior to closing its breaker, should be （）
A. slightly less than the oncoming generator frequency
B. the same as the bus frequency
C. slightly greater than the bus frequency
D. the same as the bus voltage
[单项选择]The frequency of an alternator is controlled from the main switchboard by adjusting the（）
A. frequency meter
B. voltage regulator
C. governor control
D. sychroscope switch
[单项选择]The frequency output of an operating alternator is controlled by the （）.
A. relative speed of the rotor poles
B. number of turns of wire in the armature coil
C. strength of the magnets used
D. output voltage
[单项选择]SafetyNet is a maritime safety information broadcast service offering（）on suitably equipped ships.
A. free reception
B. free transmission
C. dedicated reception
D. dedicated transmission
[单项选择]Maritime Safety Information（）International SafetyNet Service and NAVTEX Service.
A. consists of
B. can be received
C. is transmitted by
D. Are made on
