Контрольная Английский язык. Контрольная работа 1, вариант 1, номер: 245812

Номер: 245812
Количество страниц: 2
Автор: marvel

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Содержание:
"Контрольное задание №1
Вариант 1

1. Найдите в правой колонке русские эквиваленты английских слов и словосочетаний:
Ответы:
1. Direct current (d.c.)
2. Alternating current (a.c.)
3. Armature
4. Winding
5. Field coil
6. Load
7. Circuit
8. Machine-tool
9. Torque
10. Brushes
11. Shunt motor
12. Series motor
13. Compound motor
14. Power supply

2. Переведите на русский язык встречающиеся в тексте интернациональные слова:
synchronous motor
induction motor
single-, two-, three-phase motor
armature
constant speed motor
machine
manner
principal
pole
start

3. Прочтите текст и выполните следующие за ним упражнения:
Electric Motors
1) There is a wide variety of d. c. and a. c. motors. There are shunt motors, series motors, synchronous motors, induction motors, single-, two-, and three-phase motors. They are used to drive various machines.
2) Direct-current motors are of three principal kinds, and are named according to the manner in which their field coils are connected to the armature. They are named respectively: series, shunt, and compound.
3) In the series motors the field windings and armature are connected in series with each other. All the current which passes through the armature passes through the field coils. Starting under heavy load, a series motor will take a large current to provide the huge torque.
4) The field coils of shunt motors are connected direct across the brushes. The shunt motor may be called a constant speed motor, and is used for driving machine tools, lathes, wood-working machines and any machines requiring a steady speed.
5) The features of the shunt and series type of motors may be combined in one machine. This arrangement gives the compound motor. There are two windings on each field pole; a heavy or series winding for carrying the armature current, and a shunt winding connected to the power supply.
6)The compound motor may have a higher starting torque than a shunt motor and a more constant speed under changing load conditions than the series motor.

4. Переведите на русский язык в письменной форме абзацы 3,4,5 и 6.

5. Найдите соответствующие ответы на вопросы и напишите их в той последовательности, в которой заданы вопросы:
Вопросы
1. What are electric motors used for?
2. What kinds of direct-current motors do you know?
3. How may shunt motor be called?
4. What features does compound motor combine?
5. What torque does series motor provide?

6. Закончите предложения, выбрав соответствующий вариант окончания:
1. Electric motors are used … a) direct across the brushes.
2. Direct-current motors are named according to … b) provides a huge torque.
3. The field coils of shunt motors are connected … c) to drive various machines.
4. Starting under heavy load, a series motor … d) the manner in which their field coils
are connected to the armature.
"

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