《电子电气员英语》试卷(A，闭卷)
班级： 姓名： 学号：
一、选择题(每小题2分，共80分)
1. The _______ diel engine is a type of diel engine ud on ships.
A. turbine B. gas 元宵节图片大全 C. steam D. marine
2. The diel engine is a type of ____ engine.
A. turbine engine B. gas turbine C. internal combustion D. steam engine
3. The diel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a ____.
A. air bottle B. air compressor C. crank ca D. combustion chamber
4. The main moving parts of a diel engine consist of the ____ and the pistons.
A. bedplate, connecting rods B. crankshaft, the connecting rods
C. frames, crossheads D. crankshaft, the cylinder
5. The transmission system is made up of shafts, bearings, and finally the ____.
A. thrust shaft B. propeller C. reduction gear box D. train transmission
北京考驾照6. A main propulsion diel engine is normally shut down by ____
A. shutting off the air supply B. over-speeding the engine
C. curing the fuel supply D. curing the ignition system
7. The pumps employed on board ship can be divided into two main positive displacement pumps and ____pumps.
A. rotary B. non-positive displacement C. gear D. centrifugal
8.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. the fan motor
9.______are ud to handle anchors and chains.
A. Cargo winches B. Mooring winches C. Windlass D. Cargo hatches
四年级下册课本10. If the pitch of a propeller is constant throughout the length and breadth of the blade, it is said to be of _____.
A. fixed pitch B. variable pitch C. uniform pitch D. non-uniform pitch
11. The staring current of an A.C. motor is ______the rated current.
A. the same as B. much larger than C. less than D. equals
二级保养
12. Ammeter is to measure the ______
A. current B. voltage C. power D. frequency
13. Current measuring instruments must always be connected in _____.
A. parallel with a circuit B. ries with a circuit
C. ries-parallel with a circuit D. delta with the shunt
14. Current changing in direction and rising and falling in value is ______.
A. A.C. B. D.C. C. generator D. fresh water generator
15. Electrical power is expresd in _____.
A. ohms B. volts C. amps D. watts
16. The ______, cage rotor induction motor is the first choice marine motor in most modem ships becau of its electrical and mechanical simplicity.
A. single pha B. two pha C. three pha D. four pha
17. 爱你是个错Electrical circuits are protected against overheating by means of a(n) .
A.circuit breaker B.amplifier C.diode D.capacitor
18. Moisture in a D.C. motor would cau ____.
A. short circuit B. speed up C. slow down D. hunting
19. An is an electric motor driven by .
A.direct current B.wind power C.alternating current D.oil
20. ____ is a machine by which electrical energy is transformed into mechanical energy.教师新年寄语
A. An alternator B. An electric motor C. A diel engine D. A main switchboard
21. The device that most commonly utilizes the principle of electromagnetic induction is the _________. 测试你的性格
A. diode B. transformer C. transistor D. rheostat 卡牌天赋
22. One factor that determines the frequency of an alternator is the _____.
A. number of turns of wire in the armature coil B. strength of the magnets ud
C. number of magnetic poles D. output voltage
23. Reduced voltage applied to a motor during the starting period will _____.
A. result in decread acceleration time only
B. lower the starting current and increa accelerating time
C. cau a greater starting torque
D. increa the starting current and pump capacity
24. The number of cycles per cond occurring in AC voltage is known as the _____.
A. pha angle B. frequency C. wave form D. half mode
25. Electric insulation is made of organic substances and so gradually ____ with age.
A. deteriorates B. increas C. are fouled D. becomes better
