A signal of one prolonged，one short，one prolonged，and one short blast，in that order is given by a vessel（）.

相似题目

• One of the signals，other than a distress signal，that can be used by a vessel to attract attention is a(n)（）.

  A . red star shell B . searchlight C . burning barrel D . orange smoke signal

  查看最佳答案

• When a magnetic compass is not in use for a prolonged period of time it should（）.

  A . be shielded from direct sunlight B . be locked into a constant heading C . have any air bubbles replaced with nitrogen D . have the compensating magnets removed

  查看最佳答案

• If you hear more than six short blasts and one long blast of the whistle supplemented by the same signal on the general alarm，you should（）.

  A . start the fire pump B . go to your man overboard station C . go to your lifeboat station D . stand by for collisio

  查看最佳答案

• One of the signals，other than a distress signal，that can be used by a rescue boat to attract attention is a/an（）.

  A . red star shell B . searchlight C . burning barrel D . orange smoke signal

  查看最佳答案

• A whistle signal of one prolonged，one short，one prolonged and one short blast，is sounded by a vessel（）.

  A . at anchor B . towing a submerged object C . being overtaken in a narrow channel D . in distre

  查看最佳答案

• Which radiotelephone signal indicates receipt of a distress message?（）

  A . Roger wilco B . Romeo，romeo，romeo C . SOS acknowledged D . Mayday roger

  查看最佳答案

• In the International Code of signals，a group of three letters indicates（）.

  A . urgency or an emergency B . the vessel's national identity signal C . a group from the general signal code D . a group from the medical signal code

  查看最佳答案

• The duration of a prolonged blast of the whistle is（）.

  A . 2 to 4 seconds B . 4 to 6 seconds C . 6 to 8 seconds D . 8 to 10 second

  查看最佳答案

• What approximates the signal attenuation of a plasterboard wall？（）

  A . Crowd of people B . Office window C . Metal door D . Brick wall

  查看最佳答案

• While underway，in fog，you hear a whistle signal of one prolonged blast followed by two short blasts. This signal is sounded by a vessel（）.

  A . not under command B . being towed C . on pilotage duty D . aground

  查看最佳答案

• （）, which consisted of seven short blasts and one prolonged blast, all passengers have to go to their assembly station.

  A . When the distress alert is sounded B . When the emergency equipment is switching on C . When the general emergency alarm is sounded D . When the distress broadcast is sounded

  查看最佳答案

• A light signal consisting of three flashes means （）.

  A . I am in doubt as to your actions B . My engines are full speed astern C . I desire to overtake you D . I am operating astern propulsio

  查看最佳答案

• If your vessel is underway in fog and you hear one prolonged and three short blasts，this is a （）.

  A . vessel not under command B . sailing vessel C . vessel being towed (manned) D . vessel being towed (unmanned)

  查看最佳答案

• Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in （）.

  A . decreased fuel consumption per brake horsepower B . more complete cylinder scavenging C . extended valve life D . carbon formation on combustion chamber surface

  查看最佳答案

• A list signal of one white light indicates that the vessel is （）.

  A . on an even keel B . listing about 1° to the side the light is displayed on C . listing over 5° With the light displayed on the high side D . listing，and the chutes should be directed to the side where the light is displayed

  查看最佳答案

• If you hear more than six short blasts and one long blast of the whistle supplemented by the same signal on the general alarm,you should（）.

  A . start the fire pump B . go to your man overboard station C . go to your lifeboat station D . collision statio

  查看最佳答案

• A sound signal of seven short blasts and one long blast given with the vessel’s sound system is（）.

  A . Safety alarm B . Distress alarm C . Fire drill alarm D . General emergency alarm

  查看最佳答案

• Which equipment is not a source of locating signals?（）

  A . EPIRB's that transmit on 406 MHz B . Survival craft VHF transceivers that provide a beacon on 121.5 MHz C . COSPAS-SARSAT EPIRBs D . SARTs operating on 9 GHz

  查看最佳答案

• When a vessel signals her distress by means of a gun or other explosive signal，the firing should be at intervals of approximately（）.

  A . 10 minutes B . 1 minute C . 1 hour D . 3 minute

  查看最佳答案

• Jitter is an unwanted variation of one or more characteristics of a periodic signal in electronics and telecommunications and（）refers to call issues that cause variations in timing or time of arrival. 

  A .  echo B .  jitter C .  packet loss D .  digitized sampling

  查看最佳答案

• When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.

  A . a light signal of at least five short and rapid flashes B . one prolonged，one short，one prolonged，and one short whistle blasts C . four short whistle blasts D . two short whistle blast

  查看最佳答案

• 24. If your vessel is underway in fog and you hear one prolonged and three short blasts, this is a ______

  查看最佳答案

• What wind condition prolongs the hazards of wake turbulence on a landing runway for the longest period of time？

  A、Direct tailwind B、Light quartering tailwind C、Light quartering headwind

  查看最佳答案

• Passage 1Its one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect chemical signals released f

  A、 mice s inborn terror of cats B、 the evolution of Toxoplasma C、 a new study about the effects of a parasite on mice D、 a harmful parasite called Toxoplasma gondii

  查看最佳答案