- •Unit 1. Nature of electricity
- •Vocabulary
- •2. Magnetism. Electromagnetism. Magnetic field
- •Vocabulary
- •3. Electric currents and their properties
- •Vocabulary
- •4. Basic units of electricity and measuring devices
- •Vocabulary
- •I. Check yourself in your vocabulary.
- •II. Make sure you’ve grasped the contents of the texts given above:
- •III. Mind your Grammar.
- •Unit 2. Ship's direct current electric machines
- •I. The construction and the principle of operation
- •Vocabulary
- •Fig. 2 Four-pole d.C. Generator
- •2. D.C. Generators and their characteristics
- •Vocabulary
- •Fig.2. Characteristics of d.C. Generators: a - no-load and load characteristics; b - short-circuit characteristic; с - external characteristics; d - regulation characteristics
- •3. Application of d.C. Generators and their parallel operation
- •Vocabulary
- •I. Check yourself in your vocabulary.
- •II. Make sure you've understood the texts given above in a proper way:
- •III. Mind your Grammar.
- •1. Test yourself in some of the auxiliaries. Put one of the following into each gap.
- •Is are do does
- •2. Make sure you are good at building the English interrogative sentence. Put the following words in the right order to ask a question.
- •Unit 3. D.C. Motors
- •1. Convertibility
- •2. E.M.F., torque, power
- •3. Starting, speed reguation, reversal
- •Vocabulary
- •I. Check yourself in your vocabulary.
- •II. Make sure you have properly understood the texts given above:
- •III. Mind your Grammar.
- •Induce vary withdraw
- •Unit 4. Types of d.C. Motors and their distinctive features
- •1. Shunt-wound motors
- •Fig. 3. The diagram of a shunt-wound motor: a - the diagram; b, с - performance characteristics
- •2.Series-wound motors
- •Fig.4. The diagram of a series-wound motor: a - diagram; b, с - performance characteristics
- •3. Compound-wound motors
- •Fig. 5. The diagram of a compound-wound motor: a - the diagram; b, с - performance characteristics, where ShC - those of a shunt-compound motor, sc - those of a series-compound motor
- •Vocabulary
- •I. Check yourself in your vocabulary.
- •II. Make sure you've properly realized the contents of the texts given above.
- •III. Mind your Grammar:
- •Unit 5. Transformers
- •1. Purpose, construction, types
- •Vocabulary
- •2. Three-phase transformers
- •Fig.7. Diagram of field winding connections of a three-phase transformer.
- •Vocabulary
- •3. Special transformers
- •Vocabulary
- •4. Autotransformers
- •Vocabulary
- •II. Test yourself how well you have understood "the senses" of the texts dealing with transformers.
- •III. Mind your Grammar:
- •Unit 6. Marine a.C. Machines and special purpose machines
- •1. Synchronous alternators
- •Vocabulary
- •2. Induction (asynchronous) motors.
- •Vocabulary
- •Fig. 8. Asynchronous Cage Motor
- •3. Electric special purpose machines
- •Vocabulary
- •I .Check yourself in your vocabulary.
- •III. Mind your Grammar.
- •1. Ship's power plants
- •Vocabulary
- •2. Power plant switchgear equipment
- •3. Ship's power network
- •Vocabulary
- •I. Check yourself in your vocabulary.
- •II. Make sure you have properly understood the texts given above:
- •III. Translate into English, using the verbs in Active or Passiv forms or in the Infinitive: To activate
- •1. Watch maintenance
- •Vocabulary
- •2. Electrical maintenance
- •Vocabulary
- •3. Testing electric machines for defects and carrying out repairs. Current repair
- •Vocabulary
- •4. Capital repair of d.C. And a.C. Machines
- •Vocabulary
- •1. Think of English equivalents for suggested Russian words and word combinations and complete the sentences:
- •II. Choose one of the linking words or word combinations from the box and complete the sentences.
- •1. The main reasons of electrical traumatism and means of protection against it
- •Vocabulary
- •2. Some rules for safe practice and avoiding electric shocks
- •Vocabulary
- •II. Make sure you have properly understood the meaning of the text:
- •III. Mind the grammatical construction of Present Simple Passive.
- •1. Add the Past Participle to the following sentences taken from the text. Choose from the verbs in the box. Use each verb once only:
- •Put the verb in the correct form using Present Simple Active Present Simple Passive:
- •Translate into English using either positive or negative for' of Imperative:
- •1. Troubleshooting of electrical components
- •Vocabulary
- •2. Troubleshooting of d.C. Motors
- •Vocabulary
- •3. Troubleshooting of three-phase motors
- •Vocabulary
- •I. Make sure you've properly understood the texts dealing with troubleshooting of electrical equipment.
- •II. Choose one of the linking words or word combinations from the box and complete the sentences. Some of them are interchangeable.
Vocabulary
removing |
выемка |
wedge |
клин |
slot insulation |
изоляции пазов |
cone micanite insulation |
миканитовая изоляция конуса |
assembling on a shaft by a pressed fit |
сборка с напрессовкой на вал |
turning on a lathe |
проточка на токарном станке |
armature bandage |
бандаж якоря |
static balance |
статическая балансировка |
restoring |
восстановление |
galvanic coating |
гальваническое покрытие |
grinding brushes on a commutator |
притирка щеток по коллектору |
leg |
стержень |
end ring |
замыкающее кольцо |
QUESTIONS
Where is capital repair of electric machines basically carried out?
What are the procedures of capital repair of windings?
what are the procedures of capital repair of a commutator?
What are other procedures?
What is the principal difference between capital repair of a D.C. machine and that of an a.c. machine?
What damages in a cage motor are corrected?
How are generator exciters in an a.c. machine repaired?
exercises
1. Think of English equivalents for suggested Russian words and word combinations and complete the sentences:
(срок службы и надежность) of electrical
equipment largely depend on its (грамотная
техническая эксплуатация).
. (пробный пуск) is usually performed
(в режиме холостого хода).
The ____________ (вахтенный персонал) should observe the
generator drive condition and J
(колебания частоты и напряжения) while working with (валогенераторы).
Once the motor doesn't reach the
(необходимая частота), or consumes a (большой
ток), or tends to overspeed, it should be immediately stopped.
. (техническое обслуживание
электрических машин) ensures (исправная
работа) of shipboard electrical equipment and stability of its (эксплуатационные характеристики).
Electrical maintenance is guided by a
(план-график технического
обслуживания).
The (состояние узлов и деталей) is
assessed on the strength of the following data.
In order to keep electric machines in
(рабочее состояние) (профилактическое
обслуживание) is provided.
The electric drives involved in maintenance while the ship is running are those of (грузоподъемные
механизмы) which possess a ________ (резерв).
The (ослабевшие крепления) are tightened,
the (щетки) are replaced, the (щеточный аппарат) is adjusted, the (сопротивление изоляции) is measured.
. (мелкий ремонт) not pertaining to
(перемотка и перепропитка) of
windings, is carried out by a ship's crew.
The procedure of ________ (дефектация) results in making up
a detailed (ремонтная ведомость).
The lists of materials, _____ (запасные и
комплектующие части), (установочные изде
лия) needed for repairs are also included in the repair request form.
The procedure includes (продоражи-
вание и шлифовка коллектора) as well as
(продувка и промывка подшипников).
Any repair starts with (разборка и чистка
машин).
Any repair finishes with ___
(сборка, испытание машины на стенде, проверка в работе).
Capital repair also incorporates _(вос-
становление гальванических покрытий) on the parts.
The maintenance staff must substitute the (бандажи якоря) and perform (статическая
балансировка).
Damages in a (электродвигатель
с короткозамкнутым ротором) - those of its (стержни) and (замыкающие кольца) - are rectified as well.
After assembling a machine the workman must grind its brushes on the commutator and check the (зазоры).