电子电气员英语试卷

《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 _______ diesel engine is a type of diesel engine used on ships.

A. turbine

B. gas

C. steam

D. marine

2. The diesel engine is a type of ____ engine.

A. turbine engine

B. gas turbine

C. internal combustion

D. steam engine

3. The diesel 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 case

D. combustion chamber

4. The main moving parts of a diesel 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

6. A main propulsion diesel engine is normally shut down by ____

A. shutting off the air supply

B. over-speeding the engine

C. securing the fuel supply

D. securing the ignition system

7. The pumps employed on board ship can be divided into two main categories i.e. 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 used to handle anchors and chains.

A. Cargo winches

B. Mooring winches

C. Windlasses

D. Cargo hatches

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

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. series with a circuit

C. series-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 expressed 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 because of its electrical and mechanical simplicity.

A. single phase

B. two phase

C. three phase

D. four phase

17. 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 cause ____.

A. short circuit

B. speed up

C. slow down

D. hunting

19. An A.C.motor 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.

A. An alternator

B. An electric motor

C. A diesel engine

D. A main switchboard

21. The device that most commonly utilizes the principle of electromagnetic induction is the _________.

A. diode

B. transformer

C. transistor

D. rheostat

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 used

C. number of magnetic poles

D. output voltage

23. Reduced voltage applied to a motor during the starting period will _____.

A. result in decreased acceleration time only

B. lower the starting current and increase accelerating time

C. cause a greater starting torque

D. increase the starting current and pump capacity

24. The number of cycles per second occurring in AC voltage is known as the _____.

A. phase 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. increases

C. are fouled

D. becomes better

26. The coil of wire rotating in the magnetic field produces the ______.

A. voltage

B. current

C. power

D. frequency

27.When voltage and current developed in an AC circuit reach their peak values at the

same time, the power factor is ______.

A. lagging

B. leading

C. maximum

D. minimum

28. When measuring AC current flow, you must always connect the meter ______.

A. in series with the power source and load

B. in parallel with the power source and load

C. insuring correct polarity

D. using the lowest range possible to prevent instrument damage

29. “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 380V

B. the armature terminals of the motor should be connected in delta formation when voltage of power supply is 220V

C. both A and B are correct

D. the armature terminals of the motor should be connected in reverse ways of A and B

30. The star-delta starter is an effective method of _____ voltage starting of a motor.

A. increased

B. reduced

C. unchanged

D. none of the above

31. In a modem three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means ______.

A. The generator need not excitation

B. The winding on the rotor is for inputting excitation current

C. There are three phase windings on the rotor

D. The generator has brushes

32. The operation of paralleling two alternators requires the voltages to be ______ and also in phase.

A. zero

B. eliminated

C. different

D. equal

33. The main generators are connected to ______.

A. distribution boards

B. section boards

C. emergency switch boards

D. main switch boards

34. On commonly used ships, if two A.C. generators are operated in parallel, the load is distributed evenly by ____.

A. varying the D.C. exciter voltage

B. varying the reluctance of the air gap

C. regulating the speed of prime mover

D. shorting out part of the armature windings

35. In the two stroke diesel engine, it is designed so that the oil impingement is timed to proceed only on the piston ring belt during .

A. compression stroke

B. suction stroke

C. expansion stroke

D. exhaust stroke

36. In a four-stroke engine, which process lasts the longest period?

A. exhaust and suction process

B. suction and compression process

C. combustion and exhaust process

D. working and exhaust process

37. On what do you depend having the air cooler of main engine chemically washed?

A. increased air pressure difference before and after air cooler

B. reduced exhaust temperature in all cylinders

C. reduced temperature difference between water inlet and outlet

D. both A and C

38．The capacity of container ship is measured in .

A.UMS

B.TDC

C.TEU

D.GT

39. is in overall command of the ship.

A. The captain

B. The chief engineer

C. The chief officer

D. The general manager

40.The radio waves used for radar are very short, only long.

A. a few centimeters

B. a few fathoms

C. a few meters

D. a few feet

二、关联题(每小题2.5分，共20分)

Passage 1

The cooling water in the HT(high temperature) circuit cools the cylinder liners, cylinder heads and turbocharger. From the pump water is supplied to the engine manifold (总管) which is cast in the engine block. From the manifold the water is distributed to all cylinder liner sections and from each liner upwards through the cooling water channels in the liner collars. From the liner collars further into the cylinder heads. In the cylinder head the water is forced by an intermediate deck to flow along the flame plate, around the valves to the exhaust valve seats and up along the fuel injector sleeve. From the cylinder head the water is discharged via a connection piece into the discharge manifold.

The return water from the cylinder heads and turbocharger is supplied to the HT air cooler.

In the first stage of this cooler, most of the heat from the charge air is extracted. The LT circuit water cools the charge air in the second stage. The necessary cooling for the LT water is gained from a central cooler. By controlling the LT water temperature to the inter-cooler the correct charge air temperature can be obtained. For preheating purposes, a heater circuit with a pump and heater are connected in the HT circuit before the engine. Before starting, the HT circuit is heated till about 60℃ by a separate heater The pre-heating of the engine is, prior of starting up and loading on HFO, of utmost importance.

1. From the passage we know that the charge air temperature was controlled by ____.

A. sea water from a central cooler

B. fresh water from a central cooler

C. fresh water from a HT circuit

D. fresh water from the LT circuit

2. The cooling water to cool the engine was forced ______ .

A. into the cylinder liner and then upwards into the cylinder head

B. into the cylinder intermediate section and then upwards into the cylinder head

C. into the cylinder head and then downwards into the cylinder block

D. into the cylinder ends and then further into the cylinder intermediate

3. After the charge air is discharged into the HT air cooler, _______.

A. the charge air temperature will become higher

B. the charge air temperature will become lower

C. the HT water temperature will remain constant

D. the HT water temperature will become lower

4. Which of the following devices may be used to warm the engine prior to starting?

A. A high temperature cooling water system.

B. A low temperature cooling water system.

C. A central cooler.

D. The second stage cooler.

Passage 2

The field current supply in order machines comes from a lower voltage direct current generator or exciter on the same shaft as the alternator. Modern “machines”however are either statically excited or of the high-speed brushless type. The exciter is required to operate to counter the effects of power factor for a given load. The power factor is a measure of the phase difference between voltage and current and is expressed as the cosine of the phase angle. With a purely resistance load the voltage and current are in phase, giving a power factor of one. The power consumed is therefore the product of voltage and current. Inductive or capacitive loads, combined with resistance loads, produce lagging or leading power factors which have a value less than one. The power consumed is therefore the product of current, voltage and power factor. The alternating current generator supplying a load has a voltage drop is considerable. Therefore the exciter, in maintaining the alternator voltage, must vary with load current and also the power factor. The speed change of the prime mover must also be taken into account.

1. The word “machines” in the passage refers to _______.

A. the direct current generator

B. the alternating current generator

C. the exciter

D. the prime mover

2. Which of the following statements is true according to the passage?

A. With a purely resistance load, the power factor is zero.

B. Inductive loads combined with resistance loads produces leading power factors.

C. Capacitive loads combined with resistance loads produces lagging power factors.

D. With a purely resistance load, the phase angle is zero.

3. When the load has a lagging power factor this voltage drop is considerable. This sentence means that ______.

A. with a purely resistance load, the voltage drops too much

B. there is a considerable voltage drop in the capacitive load combined with resistance load.

C. when the load is the capacitive load combined with resistance load, the voltage drops to zero.

D. when the load is the inductive load combined with resistance load, the voltage drop is fairly large

4. The exciter must vary with: (1) load current, (2) the power factor, (3) speed change of the prime mover.

A. only (1)

B. only (2)

C. (1) and (2)

D. (1)、(2) and (3)

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