搜题

【单选题】

An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard ship as a （）.

A、magnetic amplifier

B、ship’s service alternator

C、three-wire DC generator

D、saturable core reactor

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更多“An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard ship as a （）.”相关的问题

第1题

[单选题] 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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第2题

[单选题] 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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第3题

[单选题] 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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第4题

[单选题] 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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第5题

[单选题] A switchboard for an AC electrical system requires the use of which of the following devices（）.

A、Frequency meter B、Ohmmeter C、Induction voltage regulator D、Current transformer governor

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第6题

[单选题] Which device is designed to automatically hold the load if power should fail to an electric winch?（）

A、Pneumatic brake B、Electromagnetic brake C、Hand brake D、Motor controller

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第7题

[单选题] Combustible gas indicators operate by drawing an air sample into the instrument（）.

A、over an electrically heated platinum filament B、where it is mixed with nitrogen C、where it is ignited by a sparking device D、where its specific gravity is measured

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第8题

[单选题] （） 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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第9题

[] Which of the following devices can route electrical signals only when activated by an external control signal？（）

A、A.Solenoid B、B.Relay C、C.Clutch D、D.Capacitor

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