Electrical conductivity()A、电导率B、载流子数C、载流子迁移率

Electrical conductivity()

  • A、电导率
  • B、载流子数
  • C、载流子迁移率

相关考题:

[A] concentration[B] continuity[C] conformity[D] conductivity

In Trial 9, the electrical force exerted by Sphere Y on Sphere X and the electrical force exerted by Sphere X on Sphere Y were exerted in which direction(s)?A.east; eastB.east; westC.west; westD.west; east

The modern house has many useful electrical ____. A.ambulancesB.equipmentsC.mechanismsD.appliances

Loran-C is which type of system ________.A.Reflected electronB.Electrical radiationC.Quarterpoint electrical navigationD.Hyperbolic radio navigation

All electrical appliances aboard a vessel should be grounded to ______.A.prevent them from falling when the vessel rollsB.protect personnel from electrical shockC.increase their operating efficiencyD.prevent unauthorized personnel from operating them

thermal conductivity gauge的意思是()。A、离子计B、热传导真空计C、放电型真空计D、麦克劳式真空计

电气设备(electrical equipment)

下面哪一个打开备用电源的操作顺序是正确的?A、I 打开Standby electrical power。II 打开E-inverter。 III 打开TRU。B、I 打开Standby electrical power。II 打开TRU。 III 打开E-inverter。C、I 打开E-inverter。II 打开TRU。 III 打开Standby electrical power。D、I 打开TRU。II 打开E-inverter。 III 打开Standby electrical power。

单选题When electrical equipment is involved in a fire,the stream of dry chemicals should be().Aaimed at the source of the flamesBfogged above the equipmentCshot off a flat surface onto the flamesDused to shield against electrical shock

名词解释题电气装置(electrical installation)

单选题The unit of electrical power is the ()AampereBkilovoltCwattDfarad

单选题Wires should have each feature of the following except ()Aflame retardantBmoisture resistantCoil resistantDlow conductivity

单选题When a rescuer finds an electrical burn victim in the vicinity of live electrical equipment or wiring,his first step is to().Aflush water over any burned area of the patientBapply ointment to the burned areas on the patientCget assistance to shut down electrical power in the areaDremove the patient from the vicinity of the live electrical equipment or wiring

单选题Electrical conductivity()A电导率B载流子数C载流子迁移率

单选题A semiconductor is a material with a ().Aconductivity higher than a normal conductorBconductivity higher than a normal insulatorChigh conductivity at low temperaturesDlow conductivity at high temperatures

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

单选题Which of the following statements is true concerning any evaporator?()AHigh conductivity of the distillate indicates distillate salinity is excessiveBIncreasing the absolute pressure of the shell will increase the distillers capacityCMesh separators are used in evaporators to filter the distillateDReducing the brine density will reduce the heat lost overboard

名词解释题电气设备(electrical equipment)

单选题Bunkering shall be terminated if there is a ()Asevere electrical stormBfire on the pierCfire on the shipDany of the above

单选题To repair a small electrical motor that has been submerged in saltwater, you should ().Awash it with fresh water and apply an external source of heatBrenew the windingsCsend it ashore to an approved service facilityDrinse all electrical parts with a carbon tetrachloride cleaning solvent and then blow dry the motor with compressed air

单选题All electrical appliances aboard a vessel should be grounded to().Aprevent them from falling when the vessel rollsBprotect personnel from electrical shockCincrease their operating efficiencyDprevent unauthorized personnal from operating them

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

单选题What is the MOST important consideration when determining how to fight an electrical fire?()AWhether the fire is in machinery or passenger spacesBDanger of shock to personnelCThe amount of toxic fumes created by the extinguisherDMaintaining electrical power

单选题A transformer in an electric circuit serves to ()Agenerate its own electrical powerBtransform electrical energy into mechanical energyCincrease or decrease circuit voltage as requiredDconvert AC current to DC current