Electrical circuits are protected against overheating by means of a/an （）.

A、circuit breaker

B、amplifier

C、diode

D、capacitor

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更多“Electrical circuits are protected against overheating by means of a/an （）.”相关的问题

第1题

[单选题] A transformer in an electric circuit serves to （）

A、generate its own electrical power B、transform electrical energy into mechanical energy C、increase or decrease circuit voltage as required D、convert AC current to DC current

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第2题

[单选题] When working on a high voltage circuit, you should always have another person present with you.This person should have a good working knowledge of （）

A、the circuit being worked on and the location of all switches and circuit breakers controlling it B、first-aid techniques for treating electrical shock C、cardiopulmonary resuscitation (CPR) D、All of the above

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第3题

[单选题] A ground in an electrical circuit outside the engine room （）.

A、cannot be detected tinder normal conditions B、is of no consequence to engineering personnel C、is indicated at the branch circuit breaker panel D、is indicated by the ground detecting lamps on the main switchboard

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第4题

[多选题] 下列哪类或哪些PCB规则属于电气类型（Electrical）的规则（）。

A、安全间距（ClearancE. B、短路（Short-Circuit） C、未连接网络（Un-RoutedNet） D、布线宽度（Width）

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第5题

[单选题] Which of the electrical properties listed will always be the same for each component in a parallel circuit?（）

A、Impedance B、Current C、Resistance D、Voltage

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第6题

[单选题] Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out （）

A、De-energize the applicable switchboard bus B、Bypass the interlocks C、Secure and tag the supply circuit breaker in the open position D、Station a man at the circuit supply switch

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第7题

[单选题] A ground can be defined as an electrical connection between the wiring of a motor and its（）.

A、shunt field B、circuit breaker C、metal framework D、inter-pole

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第8题

[单选题] 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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第9题

[] An important step in fighting any electrical fire is to（）.

A、A.stop ventilation B、B.stop the vessel C、C.de-energize the circuit D、D.apply water to extinguish the fire