問題一覧
1
49. To avoid the possibility of a scavenge fire what important check is to be carried out every watch and more frequently if a damaged piston ring is suspected
The scavenge drain line is not clogged
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43. Which of the listed requirements regarding two way radiotelephone apparatus for survival crafts do not correspond to present regulations
The apparatus shall be capable of being operated on VHF channel 16
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30. What does MUF stand for?
highest possible frequency that will be reflected by the ionosphere
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11. What is the used of Automatic amplifier regulations?
reduce distortion of weak incoming signals
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41. Which of the following VHF marine frequencies have been set aside by the ITU for the International distress, safety and calling frequency?
16
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3. Calls, announcement and conversation from one station to another on board should be as brief as possible and consistent with?
Intelligibility
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24. When onboard channel 16 is used for a shore radio connection, you always work?
simplex
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57. One wishes to have a telephone conversation with a person whose name is known . What type of call it is?
a personal call
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12. The wavelength of a radio signal reflected against the F- layer may be?
1.5 m
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23. Which channel has been designated for on-scene communication in GMDSS?
16 and 2174.5
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54. On which frequency are navigational and meteorological messages normally sent on the NAVTEX system?
518 kHZ
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50. What is the content of table #1 of radiotelephony procedures?
Phonetic alphabets and figure spelling
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2. One wishes to have a telephone conversation with a person whose name is known. This is what we called a?
a personal call
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20. What is the communication within the ships emergency organization or communication within the shore emergency response team?
Internal communication
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45. How would you determined the wave length of a radio signal ?
frequency
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6. Channel 70 for digital selectivity calling for Distress, for Safety and Calling frequency choose which one on the list?
156. 526 MHz
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24. Which statement concerning GMDSS distress alerts is true?
Information contained in a distress alert includes the name and position of the distressed vessel,and may include additional information such as the nature of the situation and what kind of assistance that may be required
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38. Can you recall on the list why an Acoustic feedback can arise?
because the volume adjustment of the speaker is too high
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27. How would you identify a VHF transmission range ?
the height of the aerial
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53. Squelch mode serves to suppress
noise in speech breaks in an SSB signal
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52.Which one on the list can mainly restricted the VHF transmission range
The curvature of the surface on the earth
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8. Which of the following requirements regarding radio telephone station do not correspond to present regulations?
While at sea the installation shall be maintained in a satisfactory condition
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39.Which statement concerning satellite EPIRBs is true?
Once activated , these EPIRBs continuously send up a signal for use in identifying the vessel and for determining the position of the beacon
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25. When the voyage is to be of 48 hours or greater duration, which equipment must be tested NOT more than 12 hours prior to getting underway from a port?
Emergency generator
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1. On board an accident happened. Urgent radio medical advice needed. Which category you choose?
safety
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14. Which channel and mode should be used when initiating a Distress alert transmission?
Channel 70 DSC
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19. Pledge of secrecy applies ?
only for those who want to send and or receive a message
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7. The transmitting power of the mariphone is adjusted by setting?
squelch
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18. The volume button of a mariphone controls?
the volume
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32. What item is considered the equivalent of aircraft's black box?
VDR
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33. The VHF radiotelephone frequency for Channel 13 is?
156.65 MHz
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44. What speed is know when the rotating shaft frequency and the natural vibrating frequency become synchronized at a particular speed?
Critical speed
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36. In shore ship use, what is useful range of VHF?
about 30-70 miles line of sight
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16. What does this mean by DUAL WATCH in maritime, VHF communication is understood?
the possibility to keep radio contact with two or more stations simultaneously
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26. With an Inmarsat- C installation there is the addressing option "special" .Via this option?
You can send a message by express delivery
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28. What is the content of table #3 of radiotelephony procedures?
Nature of distress in code from the International code of signal
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29. The VHF radiotelephone frequency for Channel 16 is?
156.8 MHz
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21. The VHF- band is in the frequency range of?
30 -300 GHz
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17. Automatic amplifier regulations is used for the following reasons?
with varying incoming signals the variation in the out going signal is a small as possible
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56. For the connection between VHF and antenna must be used?
a copper wire of sufficient diameter to minimize loses
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42. In maritime communication two international treaties are primarily involved . They are?
Solas and the international treaty of far messaging
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46. How would you understand by the wave length
independent of the frequency
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37. The maritime radio system consistinh of a series of coast stations transmitting coastal warning is called?
NAVTEX
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34. In radiotelephone communication can you indicates the prefix pan?
a calling station has an urgent message about the safety of a person
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55. What should you include in the body of a radio message seeking advice for a medical emergency at sea?
the name and owner of the ship , it's position and destination
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The call sign of a vessel is meant to?
be able to identify oneself
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15. The transmitting range of an HF transmitter is mainly determined by
the height of the transmitting antenna
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31. When all preparation have been made to ensure that the main engine is operational prior to departure what will be the final test to be carried out?
Blow indicator cocks test reversing of engine short firing kick
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47. What is a Polarization of a radio wave means ?
the direction of the electrical field
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5. With the use of INMARSAT and digital selectivity calling, distress alerts can be received?
With the NAVTEX
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51. You see a vessel displaying the code flag " LIMA" below which is red ball. The vessel is?
In distress
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4. The recommended connection between antenna and VHF is________
coax cable connection
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48. What is a Polarization of a radio wave means?
the direction of the electrical field
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40. Which visual distress signal is acceptable for daylight use only?
Hand held orange smoke distress flare
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13. Which of the following reasons why an Automatic amplifier regulation is used?
with varying incoming signals the variation in the out going signal is as small as possible
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22. Can you name of the AM signal?
both amplitude and frequency of the carrier wave are variable
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58. How does the polarization of a radio wave can be determine?
Position of the aerial
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8. Vessel with an EPIRB, you must check?
the working of the charger and check the loaded condition of the battery