問題一覧
1
Which of the following is correct about frequency modulation?
the frequency is constant
2
When an engineer on duty is inspecting an UMS-mode operated engine room at night what should precaution should be taken?
switch on the dead man alarm upon entering the control room
3
Where should the GMDSS radio log be kept on board ship?
At the GMDSS operating position
4
Which stat about the 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.
5
What is understood by the assigned frequency?
the upper side band (USB)
6
Who operates as marine traffic monitoring and communications systems , providing navigational information and the tracking of vessel movements within port limits?
VTS
7
Which of the following type/sizes of vessels in international trade do not need to be fitted with radiotelephone station?
Cargo ships below 300 tons gross
8
The "squelch" adjustment in the front of a mariphone serves to?
adjust the noise threshold of the mariphone receiver
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
10
Where does a long distance communication in the HF-bands depends on?
satellites
11
Moored in a harbour, transmitting with a mariphone is on what regulation?
not allowed
12
The squelch on the control panel of a VHF-sat serves to:
adjust the threshold level for admitting signals and refusing noise
13
How does the prefix PAN indicates in radiotelephone communications?
a calling station has an urgent message about the safety of a person
14
When may a compulsory vessel not be allowed to leave port?
When vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or logged
15
Which of the following is the full abbreviation VDR?
voyage data recorder
16
How should the letter "D" to be pronounced when spoken on the radiotelephone?
DELL TAH
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
18
A VHF transmission range is mainly restricted of which items on the list?
the curvature of the surface of the earth
19
Which one of the list is required before a mariphone is installed on board?
a license must be issued
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
21
What does MUF stand for?
highest possible frequency that will be reflected by the ionosphere
22
By non-reduced transmitting power in VHF how many power in watt should be require?
5-10 watt
23
Which of the following is a homing device to enable ships and SAR aircraft to accurately pinpoint a ship in distress position?
SART
24
Which one of the following report if an accident takes place involving the discharge or probable discharge of oil? (Annex I of MARPOL 73/78).
harmful substances report
25
What should you do FIRST to correct a condition wherein a diesel engine is operating with excessively high temperature on all cylinders?
Reduce the engine load
26
Which channel and mode should be used when initiating a Distress alert transmission?
Channel 70 DSC
27
Which signal is used by rescue unit to indicate "Avast hauling"?
Firing of a red star signal
28
Why does a radio waves used in satellite communication are not affected by ionosphere?
TDM-signals are used
29
What should you include in the body of a radio message seeking advise for a medical emergency at sea?
The name and owner of the ship, its position and destination
30
The legal type VHF-antenna has a length of?
1 meter
31
A wire aerial for an MF/HF-transmitter need to be suspended between isolators. Why?
to prevent contact with earth
32
An incinerator is a waste disposal unit that will burn?
solid material and all types of liquid waste
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
34
All ships with periodically unattended machinery plants shall, in addition to the general alam requirements should be provided with a _______.
engine room deadman's alarm
35
The secondary purpose of a radio installation onboard is _____.
To take part in public traffic
36
For the VHF-antenna connection is used?
a properly insulated copper wire of sufficient diameter
37
How does the polarization of a radio wave can be determine?
Position of the aerial
38
What requirement is required before a mariphone is installed on board?
a license must be issued
39
In maritime communication two internal treaties are primarily invoved. Identify who are they?
Solas and the international treaty of far messaging
40
Can you recall on the list why an Acoustic feedback can arise?
because the volume adjustment of the speaker is too high
41
In shore-ship use, what is useful range of VHF?
About 30-70 miles Line of sight
42
A polarization of a radio wave is determined by a:
Position of the aerial
43
The VHF radiotelephone frequency for Channel 15 is?
156.75 MHZ
44
Which of the following VHF marine frequencies have been set aside by the ITU for Digital Selective Calling frequency?
70
45
What is the degree of selectivity of a receiver?
Ability to make weak stations audible
46
To choose the HF-band the time difference between 2 stations is?
is hardly relevant
47
The content of table #2 of radiotelephony procedure is _______.
Position in code from the International code of signals
48
What is meant by frequency?
time lapse of vibrations
49
What is the most effective way of detecting any malfunction of machinery during their operation?
Electric siren
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
51
The VHF radiotelephone frequency for Channel 16 is?
156.8 MHz
52
What is the calling in distress frequency on a single side band(SSB) marine radiotelephone?
2182 kHz
53
What is a frequency mean?
time lapse of vibrations
54
You receive via the 8 MHz a DCS distress alert. The received DCS message is howver distorted. The MMSI as well as the 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
55
Channel 70 for digital selective calling for Distress, Safety, and Calling frequency operate a ?
156.526 MHz
56
Radio waves used in satellite communication are not affected by ionosphere because?
TDM-signals are used
57
How would you understand by the wave length?
independent of the frequency
58
In making VHF communication or test transmission you must?
with DSC use, first broadcast the carrier wave for at least three seconds.
59
Squelch mode serves to supress?
noise in speech-breaks in an SSB-signal
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
61
Acoustic feedback can arise?
because the volume adjustment of the speaker is too high
62
According to the "Regulation and Restrictions" of the mariphone license, how 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
63
The holder of ship low power radiotelephone operators permit is authorized to operate equipment or station using?
A3 or F3 emissions
64
Channel 70 for digital selective calling for Distress, Safety, and Calling frequency operate a ?
156.526 MHz
65
The holder of ship low power radiotelephone operator's permit is authorized to operate equipment or station using?
A3 or F3 emissions
66
Announcements and conversations from one station to another on board should be as brief as possible and consistent with _____.
intelligibility
67
VHF radiotelephone calling/safety/distress frequency is?
156.8 MHz (channel 16)
68
Which channel has been designated for on-scene communication in GMDSS? Remember Marine Engineers Question and Answers By Eduard Sweetman Co.
16 and 2174.5
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
70
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.
71
Which of the following reasons why an Acoustic amplifier regulation is used?
with varying incoming signals the variation in the out going signals is as small as possible
72
You are making ship-to-shore telephone calls on VHF. You should use the?
VHF-FM service
73
The VHF radiotelephone frequency for Channel 14 is?
156.7 MHz
74
Which statement concerning locating signals in the GMDSS is false?
Locating signals are transmitted by survival craft VHF transceivers.
75
What item is considered the equivalent of aircraft's black box?
VDR
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
77
How would you identify a VHF transmission range?
the height of the aerial
78
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
79
A polarization of a radio wave is determined by a ?
Position of the aerial
80
Which system may be useful for messages, such as local storm warning or a shore-to-ship distress alert,for which it is inappropriate to alert all ships in the satellite coverage area?
EGC
81
Where does the radio-telex in distress traffic preference is given?
ARQ
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
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 testing of the?
means of communication between the bridge and engine room
84
Where does a radio signals in the HF channels propagate mainly?
through hops between the ionized layers and the earth
85
The typical "daylight frequencies" for long distance transmission are located in the?
8 or 12 MHz-band
86
The VHF radiotelephone frequency for Channel 13 is?
156.65 MHz
87
What is the content of table #3 of radiotelephony procedures?
Nature of distress in code from the International code of signals
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
89
Which EPIRB transmits a distress alert that is received and relayed by an INMARSAT satellite?
L-Band EPIRBs
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
91
By the degree of selectivity of a receiver meant?
Ability to make weak stations audible
92
The reconnected connection between antenna and VHF is _____.
coax cable connection
93
You see a vessel displaying the code flag "LIMA" below which is a red ball. The vessel is?
in distress
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
95
Calls, announcements and conversations from one station to another on board should be as brief as possible and consistent with?
intelligibility
96
What is the Automatic amplifier regulations?
reduce distortion of weak incoming signals
97
Automatic amplifier regulation is used to?
reduce distortion of weak incoming signals
98
Underway on watch in the fireroom, the bridge reports white smoke coming from the stack. This would indicate?
excessive excess air
99
Can you name of the AM-signal
both amplitude and frequency of the carrier wave are variable
100
The button or switch "dimmer" of a mariphone serves?
to regulate the transmitting power