电子技工英语题库

1、船舶電子技工題庫 電氣系 12級船電班 Thursday, January 09, 2014【关联题】In synchronous machines, a direct current is applied to the rotor winding, which then produces a rotor magnetic field. The rotor is then turned by a prime mover producing a rotating magnetic field. “Field windings” applies to the windings that produ

2、ce the main magnetic field in a machine, and “armature windings” applies to the windings where the main voltage is induced. For synchronous machines, the field windings are on the rotor, so the terms“rotor windings” and “field windings” are used interchangeably. The rotor of a synchronous generator

3、is a large electromagnet and the magnetic poles on the rotor can either be salient or non-salient construction. Non-salient pole rotors are normally used for rotors with 2 or 4 poles rotor, while salient pole rotors are used for 4 or more poles rotor.(1)The prime mover mentioned in the passage does

4、not include .A. diesel engine B. wind power C. Water power(2) Non-salient pole rotors are normally used for those with poles.A. not more than 2 pairsB. not more than 4 pairsC. more than 2 pairs(3)Which of the following statements is not TRUE?A. Field windings produce the main magnetic fieldB. A dire

5、ct current is used to produce magnetic field C. The main voltage is produced by armature windings(4)The word “salient” means .A. prominentB. pointing outwards C. not iceable【单选】The English for “兆欧表”is .A. Megger B. Voltmeter C. Multimeter【单选】The is used to measure current.A. ammeterB. voltmeterC. wa

6、ttmeter【单选】 is a vertical height between the sea level and the bottom of the ship.A. LOAB. BeamC. Breadth【单选】The of the M/E is 5500kw at 115rpm.A. outputB. temperatureC. speed【单选】The insulation class of an electric motor indicates its .A. Maximum input of horsepower.B. Maximum temperature rise of th

7、e insulation materialC. Maximum input of kilowatts【单选】The English for “电压表”is .A. VoltmeterB. SynchrometerC. Ammeter【单选】The SOLAS Convention is the main international convention .A. Covering safety of life.B. About marineC. About marine pollution prevention【单选】 is used to measure the voltage.A. Sync

8、hrometerB. AmmeterC. Voltmeter【单选】The indicator cock is fixed on the cylinder. The meaning of “indicator cock” is . A. 示功阀B. 排气阀C. 安全阀【单选】Voltage will always lead current in a/an .A. inductive circuitB. capacitive circuitC. magnetic circuit【单选】Remote control means that . A. The system is controlled

9、automatically.B. The system is manned manuallyC. The system is situated remotely from the operator【单选】The star-delta starter is an effective method of voltage starting of a motor.A, the reducedB. increasedC. unchanged 【单选】The number of cycles per second occurring in AC voltage is known as the .A. wa

10、ve formB. phase angleC. frequency【单选】De-ballasting of STARBOARD No.1 ballast tk. The meaning of “STARBOARD” No.1 ballast tank” is .A,前尖舱B.右舷1号压载舱C后尖舱【单选】The English for “二极管”is .A, thyristorB. DiodeC. transistor【单选】Which of the following mechanical components has the function for housing the connect

11、ion terminal box?A. A stator B. A rotorC. A chassis【单选】Before doing maintenance on electrical equipment, you should .A. with a test pen in handB. turn on power firstC. turn off power first【单选】If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST .A. find

12、 a soda acid extinguisher B. shut off the fuel oil supplyC. secure the ventilation【单选】High values of ohms per volt any change in circuit characteristics.A. denoteB. minimizeC. indicate【单选】Which of the following statements about the short-circuit protection is not true?A. It is often provided to cate

13、r for terminal flashoversB. It is provided because faults between phases often occurC. It is often provided to cater for major stator winding faults【单选】 Conductor insulation designed for 600V should indicate a resistance of .A.600,00 or lowerB.60,00 or higherC.600,00 or higher【单选】SOLAS stands for .A

14、. the International Convention for the prevention from shipB. the International Convention on Standards of Training, Citification and Watch keeping for SeafarersC. the International Convention for the Safety of the Life at Sea 【单选】Which of the following materials is a good insulator?A. glassB. alumi

15、numC. steel【单选】If you are asked to accept delivery of stores and spare parts, you should .A. accept all itemsB. refuseC. make clear of your authority【单选】If an oil spill occurs on deck, you should cover the area with absorbent material. The meaning of “oil spill” is .A. 着火B. 搁浅C. 溢油【单选】Which one of t

16、he following is not safety precaution?A. safety shoes B. jacketC. safety cap【单选】Which of the following is not one of the incorrect operating conditions of ship generators?A. compile records regularlyB. reverse power protectionC. outside short circuit protection【单选】The English for“污水泵”is .A. boiler f

17、eed water pumpB. sewage pumpC. fuel transfer pump【单选】We should pay attention to the when welding and cutting?A. WaterB. AirC. Fuel oil【单选】The Safety of Life at Sea Conventions was developed by the A. IMDG conferenceB. International Maritime OrganizationC. American Bureau of Shipping【单选】Under the ter

18、ms of ISPS code, shipping companies are required to designate a Company Security Officer for the company and a for each of its ships.A. Ship Security OfficerB. Designated Person AshoreC. Internal Auditor【单选】The fresh water generator is used produce fresh water. The meaning of fresh water generatoris

19、 .A. 空压机B. 绞缆机C. 造水机【单选】When measuring AC current flow, you must always connect the meter .A. in parallel with the power source and load B. in series with the power source and loadC. insuring correct polarity【单选】When the voltage remains constant and the resistance is increased in a series circuit, t

20、he current .A. decreasesB. increasesC. increases by the square of the original value【单选】 bilge water to oily water separator.A. TransferB. Pump outC. Start【单选】The ballast water can be stored in the double bottom. The meaning of “double bottom” is .A. 涡轮增压器B. 双层底C. 油底壳【单选】Which is not one of the poss

21、ible functions of the loss-of load protection? A. It can allow a motor to recover when the voltage is restored.B. It can stop a motor in case of a failure in a mechanical transmission.C. It can be used to protect a pump against becoming unprimed.【单选】What type of oil is NOT covered in the oil pollution laws?A. main switchboardB. emergency switchboardC. main busbar【单选】The Chinese for “fuel oil system” is .