Subelement D – Other Equipment Flashcards
1-19D1 What are the antenna requirements of a VHF telephony coast, maritime utility or ship station?
A. The shore or on-board antenna must be vertically polarized.
B. The antenna array must be type-accepted for 30-200 MHz operation by the FCC.
C. The horizontally-polarized antenna must be positioned so as not to cause excessive interference to other stations.
D. The antenna must be capable of being energized by an output in excess of 100 watts.
A
1-19D2 What is the antenna requirement of a radiotelephone installation aboard a passenger vessel?
A. The antenna must be located a minimum of 15 meters from the radiotelegraph antenna.
B. The antenna must be vertically polarized and as non-directional and efficient as is practicable for the transmission and reception of ground waves over seawater.
C. An emergency reserve antenna system must be provided for communications on 156.800 MHz.
D. All antennas must be tested and the operational results logged at least once during each voyage.
B
1-19D3 What is the most common type of antenna for GMDSS VHF?
A. Horizontally polarized circular antenna.
B. Long wire antenna.
C. Both of the above.
D. None of the above.
D
1-19D4 What is the purpose of the antenna tuner?
A. It alters the electrical characteristics of the antenna to match the frequency in use.
B. It physically alters the length of the antenna to match the frequency in use.
C. It makes the antenna look like a half-wave antenna at the frequency in use.
D. None of the above.
A
1-19D5 What advantage does a vertical whip have over a long wire?
A. It radiates more signal fore and aft.
B. It radiates equally well in all directions.
C. It radiates a strong signal vertically.
D. None of the above.
B
1-19D6 A vertical whip antenna has a radiation pattern best described by? A. A figure eight. B. A cardioid. C. A circle. D. An ellipse.
C
1-20D1 For a small passenger vessel inspection, reserve power batteries must be tested:
A. At intervals not exceeding every 3 months.
B. At intervals not exceeding every 6 months
C. Before any new voyage
D. At intervals not exceeding 12 months, or during the inspection.
D
1-20D2 What are the characteristics of the Reserve Source of Energy under GMDSS?
A. Supplies independent HF and MF installations at the same time.
B. Cannot be independent of the propelling power of the ship.
C. Must be independent of the ship’s electrical system when the RSE is needed to supply power to the GMDSS equipment.
D. Must be incorporated into the ship’s electrical system.
C
1-20D3 Which of the following terms is defined as a back-up power source that provides power to radio installations for the purpose of conducting Distress and Safety communications when the vessel’s main and emergency generators cannot?
A. Emergency Diesel Generator. C. Reserve Source of Diesel Power.
B. Reserve Source of Energy. D. Emergency Back-up Generator.
B
1-20D4 In the event of failure of the main and emergency sources of electrical power, what is the term for the source required to supply the GMDSS console with power for conducting distress and other radio communications?
A. Emergency power. C. Reserve source of energy.
B. Ship’s emergency diesel generator. D. Ship’s standby generator
C
1-20D5 What is the requirement for emergency and reserve power in GMDSS radio installations?
A. An emergency power source for radio communications is not required if a vessel has proper reserve power (batteries).
B. A reserve power source is not required for radio communications.
C. Only one of the above is required if a vessel is equipped with a second 406 EPIRB as a backup means of sending a distress alert.
D. All newly constructed ships under GMDSS must have both emergency and reserve power sources for radio communications.
D
1-20D6 What is the meaning of “Reserve Source of Energy”?
A. The supply of electrical energy sufficient to operate the radio installations for the purpose of conducting Distress and Safety communications in the event of failure of the ship’s main and emergency sources of electrical power.
B. High caloric value items for lifeboat, per SOLAS regulations.
C. Diesel fuel stored for the purpose of operating the powered survival craft for a period equal to or exceeding the U.S.C.G. and SOLAS requirements.
D. None of these.
A
1-21D1 What is an EPIRB?
A. A battery-operated emergency position-indicating radio beacon that floats free of a sinking ship.
B. An alerting device notifying mariners of imminent danger.
C. A satellite-based maritime distress and safety alerting system.
D. A high-efficiency audio amplifier.
A
1-21D2 When are EPIRB batteries changed?
A. After emergency use; after battery life expires.
B. After emergency use or within the month and year replacement date printed on the EPIRB.
C. After emergency use; every 12 months when not used.
D. Whenever voltage drops to less than 20% of full charge.
B
1-21D3 If a ship sinks, what device is designed to float free of the mother ship, is turned on automatically and transmits a distress signal?
A. An emergency position indicating radio beacon.
B. EPIRB on 2182 kHz and 405.025 kHz.
C. Bridge-to-bridge transmitter on 2182 kHz.
D. Auto alarm keyer on any frequency.
A