insulator隔离子

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• Insulator

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• Insulation light is located on.（） of main switchboard.

  A . Paralleling panel B . Load panel C . Emergency generator control pane D . Main generator control pane

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• Electric insulation is made of organic substances and so gradually （） with age.

  A . deteriorates B . increases C . are fouled D . becomes better

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• The need for insulation cleaning may be determined by （）

  A . visual inspection for dirt accumulation B . high megger readings C . low operating temperature D . the time period since the last cleaning

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• 常用隔膜式计量泵为传动隔膜式。（）

  A . 正确 B . 错误

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• 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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• 隔水管张力器被用来使隔水管（）。

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• Which organization would conduct a survey of the insulation in a reefer compartment prior to loading cargo? （）

  A . PRC Customs Service B . OSHA C . CCS D . CCIQ

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• Insulator绝缘子

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• If plastic film insulation becomes damaged in air conditioning system, （） may form within the film.

  A . evaporation B . condensation C . liquefies D . vaporizatio

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• 丝状真菌的无隔菌丝是由（）细胞组成，有隔菌丝是由（）细胞组成。后者又可以分为有隔封闭菌丝和有隔多孔菌丝。

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• 丝状真菌的无隔菌丝是由（）细胞组成，有隔菌丝是由（）细胞组成。后者又可以分为有隔封闭菌丝和有隔（）菌丝。

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• Which of the following materials is a good insulator?（）

  A . steel B . aluminum C . glass D . copper

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• In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）

  A . Hard rubber B . Canvas C . Leather D . Sponge rubber

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• The electric wires in a house____with some kind of insulation.

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• The room’s insulation is too bad. 这句话的 的意思是 _____ 。

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• Oligodendrocytes make myelin, a fatty substance that insulates nerve axons and speeds the conduction of impulses along nerve fibers.

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• 原文:Such materials are characterized by good insulation and high resistance to wear. 译文:这些材料的特点是:绝缘性好。

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• If you add enough insulation to your house, you may be able to________.

  A．improve your work environment B．cut your utility bills by half C．get rid of air-conditioners D．enjoy much better health

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• 电容器的特性是（)。A.通直流，也通交流B.通直流，隔交流C.隔直流，通交流D.隔直流，也隔交流

  电容器的特性是()。 A.通直流，也通交流 B.通直流，隔交流 C.隔直流，通交流 D.隔直流，也隔交流

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• You should NOT use a power tool if （).A.It has a three-prong plugB.The insulation of the p

  You should NOT use a power tool if (). A.It has a three-prong plug B.The insulation of the power wires is worn C.Hand tools can be used instead D.The power source is alternating current

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• Plastics are the best insulator of electricity, rubber______it closely.

  A．following B．followed C．to follow D．being followed

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• 真菌的菌丝分无隔菌丝和有隔菌丝两种，无隔菌丝的每个细胞内含1或2个核;有隔菌丝的细胞内有多个核。（)

  此题为判断题(对，错)。

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