Кущ Т.Ю., Воловник М.С. Основы английского языка для судовых электриков (1998)

3. The amortisseur winding is used only for ...

a) alternate polarity; b) connection to the line; c) starting.

в) Учитывая контекст, вставьте пропущенные слова. (К тексту не обращайтесь, пока не выполните все задания.)

The stator winding of a ... motor consists of a ... of coils placed in ... slots &., as in a three-phase ... motor, connected either star ... delta for a definite ... of poles. Three leads ... brought out of the ... winding for connection to the .... The field coils, of which ... must be as many ... there are poles ... the stator, are wound ... the same manner as ... used in d-c .... The amortisseur winding is embedded ... the core of the ... poles & connected on ... side to end rings. ... is used only for .... The rotor winding consists ... a number of field ... joined in series for ... polarity. Two leads are ... out & connected to ... slip rings in order ... the winding can be ... with direct current.

Отличное понимание текста; 24-27 правильно заполненных пропусков и 3 правильных ответа за 7 минут.

Хорошее понимание текста; 20-23 пропуска и 2 ответа за 8 минут.

Удовлетворительное; 16-19 пропусков и 1 ответ за 9 минут.

Тестовые задания 6

1. В 8-10 предложениях расскажите об эксплуатации генераторов переменного тока.

. 2. Выберите наиболее точный перевод на русский язык.

II was said that our age was the age of computerization.

а) Говорил^ что это век компьюторизации.

б) Было сказано, что наш век является веком компьюторизации.

в) Было сказано, что наш век был веком компьюторизации.

3. Выберите наиболее точный перевод на английский язык. Он предположил, что два генератора переменного тока должны работать параллельно.

a) Не assumed that two alternators are to be paralleled.

b) He believed two alternators work in parallel.

c) He assumed that two alternators are to be parallel.

4. Заполните пропуск соответствующей формой глагола.

I read in the press yesterday that a great, scientific achievement...

a) was being made; b) was made; c) had been made.

5. Заполните пропуск соответствующей формой глагола.

Не considered that this theory ... best ... with one’s general views on nature.

a) has agreed; b) would agree; c) will agree.

6. Заполните пропуск соответствующей формой глагола.

You ..., I suppose, before you started working that you had to

base your designs on scientific; data.

a) had been told; b) are told; c) will be told.

7. Выберите правильное по смыслу окончание предложения. Whether a synchronous generator has a squirrel-cage winding

or not depends on ...

a) salient field poles that are excited by dc; b) a ground wire for lighting purposes; c) the use to which the generator is put.

8. Выберите правильное по смыслу окончание предложения. It is most important that all electrical connections & securing

bolts...

a) are kept to a minimum; b) must be measured; c) are checked for tightness.

9. Выберите наиболее точный перевод на русский язык.

The generated voltage varies with the load, & therefore in

order to keep the voltage constant, it. will be necessar^ either to adjust the exciting voltage manually or to use an automatic voltage regulator.

а) Генерируемое напряжение изменяется с нагрузкой и поэтому для того, чтобы поддерживать его на нагрузке постоянным, необходимо будет либо регулировать напряжение возбуждения вручную, либо использовать автоматический регулятор напряжения (АРН).

б) Генерируемое напряжение меняется с нагрузкой и поэтому его необходимо регулировать вручную или использовать АРН.

в) Так как напряжение изменяется с изменением нагрузки, то его необходимо регулировать вручную или q помощью АРН.

10. Выберите наиболее точный перевод на английский язык. Надежная работа подшипника зависит от правильной установки и регулярного осмотра.

a) The reliable work of the bearing shouldn’t depend on correct mounting & regular inspection.

b) The working security of the bearing is depending on correct . mounting & regular inspection.

c) The working safety of the ball bearing is depending on correct mounting & regular inspection.

11. Напишите на английском языке 5 предложений, касающихся условий работы генераторов переменного тока.

Результаты подведите по образцу ТЗ 1.

Итоговое контрольное задание по проверке навыков работы с литературой по специальности

1. Просмотрите следующие тексты и отберите только те, в которых речь идет:

Вариант I - об асихронном двигателе;

Вариант II - о двигателе постоянного тока.

A. DC Motors

A dc motor is a machine which is supplied with dc for some mechanical work. DC,motors are also widely used where control of speed is required. v

Construction. The main parts of the dc motors are the armature, field poles & frame, end plates or brackets, & brush rigging.

B. Troubleshooting & Repair

One of the tests for discovering an open circuit in the starting winding is the use of the test lamp. If the circuit is found open, the trouble is in the starting winding or in the centrifugal switch if the latter is used.

The centrifugal switch should be examined first, since it is mostly,,likely to be the cause of the trouble. Moving the rotor shaft toward the front end plate may close the contacts of the switch, in • case the trouble is at this point, & cause a test lamp in the circuit to light. The rotor may also have too much end play which can be determined by moving it back & forth. There should be a maximum end play of not more than 1 /64in. If more end play is observed, fiber washers should be put on the shaft so that the rotor core lines up with the stator core. If too much end play is allowed to exist, the rotor may come to a stop position that the centrifugal switch contacts will remain open.

If these tests have been made & the circuit still remains open, the motor is disassembled & a test lamp is used to check the operation of^ the switch. If found to be defective, the centrifugal switch is carefully cleaned & all parts adjusted.

The starting winding is next tested, if the centrifugal switch is

found to be in good order. The flexible leads to the power line that are.spliced to the wires of the coils are examined first & replaced if they are faulty. If the starting winding is defective, the open may be located by the method described earlier for open circuits. Although the break in the coil may be repaired by splicing if it is readily accessible, rewinding is necessary if the coil is burned or otherwise severely damaged. Should it be necessary to rewind the starting winding, it is advisable to test the running winding thoroughly for any defects before replacing the new starting winding over it.