Electrical power is expressed in （）

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• Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）

  A . Use the CO system and evacuate the engine room B . Use the fire main system and evacuate the engine room C . Evacuate the engine room and use the CO system D . Evacuate the engine room and use the fire main system

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• If a person is unconscious from electric shock，you should first remove him from the electrical source and then（）.

  A . administer ammonia smelling salts B . check for serious burns on the body C . determine if he is breathing D . massage vigorously to restore circulatio

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• Which of the listed devices is used to measure pressure and convert it to an electrical signal?（）

  A . Transducer B . Reducer C . Transformer D . Rectifier

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• The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the（）.

  A . loss of residual magnetism B . absorption of moisture in the insulation C . insulation varnish flaking D . dirt collecting on the winding

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• Your vessel is equipped with a fixed C02 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）.

  A . Use the C0 system and evacuate the engine room B . Use the fire main system and evacuate the engine room C . Evacuate the engine room and use the C0 system D . Evacuate the engine room and use the fire main system

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• （） is a machine by which electrical energy is transformed into mechanical energy.

  A . An alternator B . An electric motor C . A diesel engine D . A main switchboard

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• The part of the shipboard electrical system used to control the distribution of power to the branch circuits, is the （）.

  A、bridge control panel B、disconnect links C、governor relay box D、main switchboard

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• The unit of electrical resistance is the （）

  A . ampere B . volt C . watt D . ohm

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• If the power is 0 dBm， what is the power in mW？（）

  A .  0 mW B .  1 mW C .  10 mW D .  1.5 mW

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• A fire in an electrical generator is considered to be （）.

  A . Class "A" B . Class "B" C . Class "C" D . Class "D&quot

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• Which of the listed classes of fire is considered as one involving electrical equipment?（）

  A . Class "A" B . Class "B" C . Class "C" D . Class "D&quot

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• Since electrical burn victims may be in shock，the FIRST medical response is to check for（）

  A . indication of broken bones B . breathing and heartbeat C . symptoms of concussion D . bleeding injurie

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• In an alternating current electrical system, a low system power factor is a direct sign of （）

  A . wasted energy B . efficient operation C . a short in the exciter field windings D . an excessive number of minor system ground

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• Diesel powered industrial trucks on a ship that are provided with safeguards to the exhaust，fuel，and electrical systems are designated（）.

  A . DEFE B . DE C . DS D . DES

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• Power is defined as the （）.

  A . rate of doing work B . amount of force needed to overcome friction C . amount of work accomplished D . distance through which an object is moved

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• An electrical device which prevents an action from occurring until all other required conditions are met is called a/an （）.

  A . limit B . monitor C . modulator D . interlock

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• When a rescuer finds an electrical burn victim in the vicinity of live electrical equipment or wiring，his first step is to（）.

  A . flush water over any burned area of the patient B . apply ointment to the burned areas on the patient C . get assistance to shut down electrical power in the area D . remove the patient from the vicinity of the live electrical equipment or wiring

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• Basic emergency care for third degree electrical burn is to（）.

  A . flood the burned area with warm water for two minutes B . brush away the charred skin and wrap the burned area C . cover the burned area with a clean cloth and transport the patient to a medical facility D . apply ointment or spray to the burned area and wrap with a clean cloth

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• The （）, cage rotor induction motor is the first choice marine motor in most modern ships because of its electrical and mechanical simplicity.

  A . single phase B . two phase C . three phase D . four phase

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• 6. Most of us . But do you know that about 1.5 billion people in this world have no access to electrical power.(take......for granted)

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• Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire？

  A.CO2 B.ABC dry chemical C.CO2 propelled foam D.All of the above

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• The device capable of doing this is called a capacitor. The ability of a capacitor to store electrical energy is termed capacitance.（）

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• How much of your country’s electrical supply is ________ from water power？

  A) deduced B) detached C) derived D) declined

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• Prior to fertilization, the egg’s electrical charge is positive.（）

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