Which of the motors for the devices listed below is fitted with an instantaneous overload relay?（）

A、A.Fan

B、B.Pump

C、C.Winch

D、D.Machine tool

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更多“Which of the motors for the devices listed below is fitted with an instantaneous overload relay?（）”相关的问题

第1题

[单选题] Which of the following electric motors would be the safest and most reliable to use on the main deck of a vessel in foul weather conditions?（）

A、Sealed motors B、Drip proof motors C、Enclosed motors D、Watertight motors

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第2题

[单选题] Which of the following electric motors would be the safest and most reliable to use on the main deck of a vessel in foul weather conditions?（）

A、Sealed motors B、Drip proof motors C、Enclosed motors D、Watertight motors

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第3题

[单选题] “A centrifuge consists of an electric motor driving a vertical shaft on the top of which is mounted the bowl assembly”.According to this sentence, we can know that is mounted on the top of the vertical shaft（）

A、a centrifuge B、an electric motor C、a bowl assembly D、a driving motor

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第4题

[单选题] “380V/220V Y/△” noted on the nameplate of a non-synchronous motor means that（）

A、the armature terminals of the motor should be connected in star formation when voltage of power supply is 380 B、the armature terminals of the motor should be connected in star formation when voltage of power supply is 220 C、both A and B are correct D、the armature terminals of the motor should be connected in reverse ways of A and B

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第5题

[单选题] Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?（）

A、Impeller B、Electric motor C、Volute D、Eye

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第6题

[单选题] Electrical failures in motors are caused by the breakdown of insulation, which may be caused by （）

A、penetration of moisture B、accumulation of dirt C、overheating D、All of the above

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第7题

[单选题] Among the basic categories of equipment, which of the following are used to convert mechanical into hydraulic energy?（）

A、The hydraulic pumps B、Valves C、Hydraulic cylinders D、Hydraulic motors

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第8题

[] An AC synchronous transmission type remote steering control system consists of a （）.

A、A.transmitter at the steering station and a receiver at the steering engine B、B.reversible motor at the steering station geared to the steering pumps C、C.small induction motor on the bridge which controls the redder through pulleys D、D.variable displacement hydraulic pump driven by a reversible DC motor

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第9题

[单选题] In a general cargo crane, （） is fitted to lift the cargo load.

A、the slewing motor B、the luffing motor C、the hoisting motor D、none of the above

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第10题

[单选题] Among the basic categories of equipment, which of the following are used to allow the hydraulic energy to be controlled?（）

A、hydraulic pumps B、valves C、hydraulic cylinders D、hydraulic motors

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