問題一覧
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1. Which of the following is correct about frequency modulation?
the frequency is constant
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2. When an engineer on duty is inspecting an UMS-mode operated engine room at night what precaution should be taken?
switch on the dead man alarm upon entering the control room
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3. Where should the GMDSS radio log be kept on board ship?
At the GMDSS operating position
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4. Which statement about transmitting distress messages by radiotelephone is incorrect?Analyze Marine Engineers Question and Answers.. Eduard Sweetman Co.
It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration.
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5. What is understood by the assigned frequency?
the upper side band (USB)
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6. Who operates as marine traffic monitoring and communications systems, providing navigational information and the tracking of vessel movements within the port limits?
VTS
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7. Which of the following types/sizes of vessels in international trade do not need to be fitted with a radiotelephone station?
Cargo ships below 300 tons gross
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8. The "squelch" adjustment on the front panel of a mariphone serves to ?
adjust the noise threshold of the mariphone receiver
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9. This communication system is used for distress alert, transmission and reception of maritime safety information via enhanced group calls. This may also be used for general communications.
Satcom C
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10. Where does a long distance communication in the HF-bands depends on ?
satellites
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11. Moored in a harbour, transmitting with a mariphone is on what regulation?
not allowed
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12. The squelch on the control panel of a VHF-sat serves to:
adjust the threshold level for admitting signals and refusing noise
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13. How does the prefix PAN indicates in radiotelephone communications?
a calling station has an urgent message about the safety of a person
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14. When may a compulsory vessel not be allowed to leave port?
When the vessel has replaced a required piece of GMDSS - related equipment but its performance has not been verified or logged
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15. Which of the following is the full name of abbreviation VDR?
Voyage data recorder
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16. How should the letter "D" be pronounced when spoken on the radiotelephone?
DELL TAH
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17. You see an iceberg that has not been reported. What kind of radio message do you transmit to warn others? Apply Marine Engineers Question & Answers ...Eduard Sweetman Co...
Safety message
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18. A VHF transmission range is mainly restricted of which items on the list ?
the curvature of the surface of the earth
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19. Which one on the list is required before a mariphone is installed on board ?
a license must be issued
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20. At what temperature in degree Celsius will safety devices called fusible plug installed in air compressor or compressed air system melts in order to prevent explosion?
100
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21. What does MUF stand for?
highest possible frequency that will be reflected by the ionosphere
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22. By non-reduced transmitting power in VHF how many power in watt should be require?
5 - 10 watt
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23. Which of the following is a homing device to enable ships and SAR aircraft to accurately pinpoint a ship in distress position ?
SART
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24. Which one of the following report if an incident takes place involving the discharge or probable discharge of oil ?(Annex I of MARPOL 73/78).
harmful substances report
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25. What should you do FIRST to correct a condition wherein a diesel engine is operating with excessively high exhaust temperature on all cylinders ?
Reduce the engine load
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26. Which channel and mode should be used when initiating a Distress alert transmission? Remember ..Marine Engineers Question and Answers ..Eduard Sweetman Co.
Channel 70 DSC
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27. Which signal is used by a rescue unit to indicate"Avast hauling"?
Firing of a red star signal
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28. Why does a radio waves used in satellite communication are not affected by ionosphere?
TDM-signals are used
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29. 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, its position and destination
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30. The legal type VHF-antenna has a length of ?
1 meter
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31. A wire aerial for an MF/HF -transmitter need to be suspended between isolators, Why?
to prevent contact with earth
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32. An incinerator is a waste disposal unit that will burn ?
solid material and all types of liquid waste
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33. In maritime radio-communication by "low power" given by a nautical phone is meant a transmitting power. What is the maximum power of watt given?
0.5 watt maximum
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34. All ships with periodically unattended machinery plants shall, in addition to the general alarm requirements should be provided with a
engine room deadman's alarm
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35. The secondary purpose of a radio installation onboard is
To take part in public traffic
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36. For the VHF-antenna connection is used ?
a properly insulated copper wire of sufficient diameter
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37. How does the polarization of a radio wave can be determine?
Position of the aerial
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38. What requirement is required before a mariphone is installed on board ?
a license must be issued
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39. In maritime communication two international treaties are primarily involved. Identify who are they?
Solas and the international treaty of far messaging
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40. 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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41. In shore-ship use, what is useful range of VHF?
About 30-70 miles Line of sight
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42. A polarization of a radio wave is determined by a:
position of the aerial
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43. The VHF radiotelephone frequency for Channel 15 is ?
156.75 MHz
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44. Which of the following VHF marine frequencies have been set aside by the ITU for Digital Selective Calling frequency?
70
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45. What is the degree of selectivity of a receiver?
Ability to make weak stations audible
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46. To choose the HF-band, the time difference between 2 stations is ?
is hardly relevant
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47. The content of table #2 of radiotelephony procedures is
Position in code from the International code of signals
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48. What is meant by frequency?
time lapse of vibrations.
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49. What is the most effective way of detecting any malfunction of machinery during their operation?
Electric siren
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50. When a licensed mariphone is replaced, what would you do?
the old mariphone must be checked out and the new one must be checked
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51. The VHF radiotelephone frequency for Channel 16 is ?
156.8 MHz
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52. What is the calling in distress frequency on a single side band (SSB) marine radiotelephone?
2182 kHz
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53. What is a frequency mean?
time lapse of vibrations.
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54. You receive via the 8 MHz a DCS distress alert. The received DCS message is however distorted. The MMSI as well as the position are illegible. After listening at the 8 MHz telephone distress frequency, nothing is heard. This is because ?
First an acknowledgement of a coastguard station must be received via the 8MHz
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55. Channel 70 for digital selective calling for Distress, Safety and Calling frequency operate a ?
156.526 MHZ
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56. Radio waves used in satellite communication are not affected by ionosphere because ?
TDM-signals are used
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57. How would you understand by the wave length ?
independent of the frequency.
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58. In making VHF communication or test transmission you must?
with DSC use, first broadcast the carrier wave for at least three seconds
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59. Squelch mode serves to suppress?
noise in speech-breaks in an SSB-signal
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60. The ship normally carries portable VHF and UHF marine radios. They are used for internal communications and small boat operations. They are called ?
walkie talkies
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61. Acoustic feedback can arise ?
because the volume adjustment of the speaker is too high
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62. According to the "Regulation and Restrictions" of the mariphone licence, how would you define the mariphone?
apart from its position as indicated alsobe used in other places provided its call sign is at least transmitted once at the start and at the end of each transmission
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63. The holder of ship low power radiotelephone operators permit is authorized to operate equipment or station using ?
A3 or F3 emissions
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64. Channel 70 for digital selective calling for Distress, for Safety and Calling frequency choose which one on the list?
156.526 MHz
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65. The holder of ship low power radiotelephone operator's permit is authorized to operate equipment or station using ?
A3 or F3 emissions
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66. Announcements and conversations from one station to another on board should be as brief as possible and consistent with
Intelligibility
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67. VHF radiotelephone calling /safety/distress frequency is ?
156.8 MHz (channel 16),
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68. Which channel has been designated for on-scene communications in GMDSS? Remember..Marine Engineers Question and Answers..By Eduard Sweetman Co.
16 and 2174.5
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69. Which of the listed requirements regarding portable radio apparatus for survival crafts do not correspond to present regulations?
Transmitter and receiver to be tested with intervals of not more than one month
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70. At what speed a radio-wave travels in the air ?
300.000 per kilometers per hour
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71. 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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72. You are making ship-to-shore telephone calls on VHF. You should use the ?
VHF-FM service
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73. The VHF radiotelephone frequency for Channel 14 is?
156.7 MHz
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74. Which statement concerning locating signals in the GMDSS is false? Remember..Marine Engineers Question and Answers Eduard Sweetman Co.
Locating signals are transmitted by survival craft VHF transceivers.
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75. What item is considered the equivalent of aircraft's black box?
VDR
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76. 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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77. How would you identify a VHF transmission range ?
the height of the aerial
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78. Which statement concerning satellite EPIRBs is true? Remember..Marine Engineers Question & Answers..Eduard Sweetman Co.
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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79. A polarization of a radio wave is determined by a ?
position of the aerial
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80. Which system may be useful for messages, such as local storm warnings or a shore-to-ship distress alert, for which it is inappropriate to alert all ships in the satellite coverage area?Understand
EGC
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81. Where does the radio-telex in distress traffic preference is given?
ARQ
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82. Which of the following requirements regarding radio telephone stations do not correspond to present regulations?
While at sea the installation shall be maintained in a satisfactory condition
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83. Regulations require that any tankship making a voyage of over a 48 hour duration must have certain tests conducted not more than 12 hours prior to leaving port. Meeting this requirement includes the testing of the ?
means of communication between the bridge and engine room
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84. Where does a radio signals in the HF channels propagate mainly ?
through hops between the ionized layers and the earth
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85. The typical "daylight-frequencies" for long distance transmission are located in the ?
8 or 12 MHz-band
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86. The VHF radiotelephone frequency for Channel 13 is ?
156.65 MHz
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87. What is the content of table #3 of radiotelephony procedures?
Nature of distress in code from the International code of signals
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88. 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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89. Which EPIRB transmits a distress alert that is received and relayed by an INMARSAT satellite?
L-Band EPIRBs
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90. What is the best example of a wire to be used for the connection between VHF and antenna ?
a copper wire of sufficient diameter to minimize loses
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91. By the degree of selectivity of a receiver is meant ?
ability to make weak stations audible
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92. The recommended connection between antenna and VHF is
coax cable connection
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93. You see a vessel displaying the code flag "LIMA" below which is a red ball. The vessel is ?
In distress
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94. In order to comply with GMDSS regulations, what is the minimum number of portable two way VHF walkie talkies to use in survival craft that should be carried onboard vessels?
3 sets
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95. Calls, announcement and conversations from one station to another on board should be as brief as possible and consistent with ?
Intelligibility
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96. What is the used of Automatic amplifier regulation ?
reduce distortion of weak incoming signals
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97. Automatic amplifier regulation is used to ?
reduce distortion of weak incoming signals
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98. Underway on watch in the fireroom, the bridge reports white smoke coming from the stack. This would indicate ?
excessive excess air
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99. Can you name of the AM-signal ?
both amplitude and frequency of the carrier wave are variable
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100. The button or switch "dimmer" of a mariphone serves?
to regulate the transmitting power