問題一覧
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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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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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146. 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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123. Which radio frequency/channels are reserved for emergency communication?
2182 kHZ/HF channel 16
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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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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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113. Which of the listed requirements regarding VHF radiotelephone installations do not correspond to present regulations?
Cargo ships of less than 500 tons gross shall have the batteries located in the upper part of the ship
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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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37. How does the polarization of a radio wave can be determine?
Position of the aerial
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109. The call sign of a vessel is meant to?
be able to identify oneself
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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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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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97. Automatic amplifier regulation is used to ?
reduce distortion of weak incoming signals
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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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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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112. Which visual distress signal is acceptable for daylight use only?
Hand-held orange smoke distress flare
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101. The transmitting range of an HF transmitter is mainly determined by ?
the height of the transmitting antenna
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147. Which of the listed requirements regarding radiotelegraph installations do not correspond to present regulations?
The installation shall include equipment for radiotelephone communication on distress frequencies in addition to working frequencies
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81. Where does the radio-telex in distress traffic preference is given?
ARQ
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135. The transmitting power of the mariphone is adjusted by setting?
squelch
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108. On which frequency are navigational and meteorological messages normally sent on the NAVTEX system?
518KHZ
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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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75. What item is considered the equivalent of aircraft's black box?
VDR
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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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138. Distress alert initiated for other than an appropriate test, by communications equipment intended for alerting, when no distress situation actually exists.
False alarm
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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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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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41. In shore-ship use, what is useful range of VHF?
About 30-70 miles Line of sight
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16. How should the letter "D" be pronounced when spoken on the radiotelephone?
DELL TAH
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114. What is the primary purpose for Digital Selective Calling (DSC)? Understand Red Book of Marine Engineering Question and Answers Vol. 1 & 2 Paterson, W.B.
DSC is to be used for transmitting and receiving distress alerts to and from other ship or coast radio stations via radio
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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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53. What is a frequency mean?
time lapse of vibrations.
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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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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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46. To choose the HF-band, the time difference between 2 stations is ?
is hardly relevant
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160. In making VHF communication or test transmission, you must tell how, when, where, and why?
with DSC use, first broadcast the carrier wave for at least three seconds
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151. The VHF radiotelephone calling/safety/distress frequency is ?
156.8 MHz (channel 16),
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51. The VHF radiotelephone frequency for Channel 16 is ?
156.8 MHz
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10. Where does a long distance communication in the HF-bands depends on ?
satellites
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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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79. A polarization of a radio wave is determined by a ?
position of the aerial
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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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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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3. Where should the GMDSS radio log be kept on board ship?
At the GMDSS operating position
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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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30. The legal type VHF-antenna has a length of ?
1 meter
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42. A polarization of a radio wave is determined by a:
position of the aerial
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128. The legal type VHF-antenna has a length of?
1 meter
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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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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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145. In radiotelephone communications can you indicates the prefix PAN ?
a calling station has an urgent message about the safety of a person
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111. Which distress signal is required for a liferaft in ocean service and could be effectively used to attract the attention of aircraft at night? Understand ... Red Book of Marine Engineering Questions & Answers Vol. 1 & 2 Paterson, W.B.
Red flares
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136. Which statement concerning GMDSS distress alerts is true? Understand..Red Book of Marine Engineering Questions & Answers.. Eduard Sweetman Co
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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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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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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150. Squelch mode serves to suppress ?
noise in speech-breaks in an SSB-signal
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86. The VHF radiotelephone frequency for Channel 13 is ?
156.65 MHz
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139. With the use of INMARSAT and digital selective calling, distress alerts can be received ?
With the NAVTEX
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110. What is the content of table #1 of radiotelephony procedures?
Phonetic alphabets and figure spelling
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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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61. Acoustic feedback can arise ?
because the volume adjustment of the speaker is too high
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43. The VHF radiotelephone frequency for Channel 15 is ?
156.75 MHz
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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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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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143. A radiotelegraph station shall be provided with
direct access to the navigating bridge
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148. You are approaching a port when you see three lights in a vertical line. The upper and lower are green and the middle white. What does this mean?
A vessel may proceed only when it has received specific orders to do so.
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153. 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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36. For the VHF-antenna connection is used ?
a properly insulated copper wire of sufficient diameter
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115. Which one on the list can mainly restricted the VHF transmission range?
The curvature of the surface of the earth
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118. On which frequency are navigational and meteorological messages normally sent on the NAVTEX system?
518KHZ
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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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121. The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called?
NAVTEX
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152. The VHF-band is in the frequency range of ?
30 - 300 GHz
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159. Pledge of secrecy applies ?
only for those who want to send and/or receive a message
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156. Which one of the listed entries in the radio log for radiotelephone station do not correspond to present regulations? Entries in the radio log shall include
the condition and results of tests of the main radiotelegraph installation
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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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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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99. Can you name of the AM-signal ?
both amplitude and frequency of the carrier wave are variable
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132. 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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11. Moored in a harbour, transmitting with a mariphone is on what regulation?
not allowed
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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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120. Which one of the listed requirements regarding radiotelephone auto alarm do not correspond to present regulations?
in presence of atmospheric or interfering signals automatically adjust itself
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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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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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1. Which of the following is correct about frequency modulation?
the frequency is constant
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100. The button or switch "dimmer" of a mariphone serves?
to regulate the transmitting power
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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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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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73. The VHF radiotelephone frequency for Channel 14 is?
156.7 MHz
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131. What speed is known when the rotating shaft frequency and the natural vibrating frequency become synchronized at a particular speed?
Sympathetic speed
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129. When onboard channel 16 is used for a shore radio-connection, you always work?
simplex
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134. For the connection between VHF and antenna must be used ?
a copper wire of sufficient diameter to minimize loses
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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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103. You are proceeding to a distress site where the survivors are in liferafts. Which action will assist in making your vessel more visible to the survivors? Apply... Red Book of Marine Engineering Questions & Answers Vol. 1 & 2..Paterson W.B.
Making smoke in daylight
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45. What is the degree of selectivity of a receiver?
Ability to make weak stations audible
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102. What does a Modulation meant ?
to enhance the side bands in relation to the carrier wave
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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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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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124. What is meant by the degree of selectivity of a receiver ?
ability to make weak stations audible