In some machines the rotor is locked during transport. When mounting the machine this locking must be removed in accordance with the instructions fitted on the machine.
C. First Starting
The machines with antifriction bearings will be delivered from our factory ready lubricated & they require no further lubrication before starting up. The machines with sleeve bearings must be lubricated according to the separate instructions supplied with the machine.
The water flow in the machines with air-to-water heat exchanger can be adjusted by means of a valve to the rate indicated in the rating plate of the machine. The flow rate must be measured with a separate water-meter or if no meter is available, by measuring the amount of water flowing out of the outlet pipe during a fixed time.
Oxides or some dirt may appear on the surface of the slip rings in the slip-ring motors during the transport, stocking, erection or standstill of a longer period. The slip rings must be cleaned -before starting up the machine. Check also that the brushes can move freely in their holders.
25. / 2 мин./ Прослушайте/прочтите 10 рядов слов. В начале каждого ряда тестовое слово, за ним следуют 4 других,, однЬ из которых близко по значению к тестовому. Назовите это слово.
1. exit: a) way in b) way out c) way up d) waj down
2. correct: a) complete b) sarrie c) right d) quiet
3. sick: a) ill b) full c) true d) different
4. simple: a) ready bj easy c) alone d) daily
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5. buy: a) feel b) have c) purchase d) send
6. attempt: a) mention b) destroy c) obtain d) try
7. stay: a) leave b) prompt c) remain d) watch
8. 8. discover: a) find b) refuse c) sail d) travel
9. 'go: a) be b) eat c) move d) do
10. observe: a) pull b) watch c) remain d) hear
26. /8 мин./ а) Прослушайте/прочтите и запомните несколько определений из “ Классификационных правил постройки морских судов”, б) Запишите со слуха или по памяти следующие слова и, используя их, воспроизведите эти определения по памяти.
From “ Rules for Classification & Construction of Sea-Going Ships”
Ключевые слова: essential equipment, spaces, earthing, to ensure, operation, navigation, cargo, life, equipment, accessible, personnel, overheat, exceed, permissible, connection, hull.
1. Essential equipment is equipment ensuring, under normal operation, safe navigation, safety of cargo & safety of human life on board ship.
2. Special electrical spaces are spaces or locations intended expressly for electrical equipment & accessible only for attending personnel.
3. Overheat temperature is a temperature exceeding the maximum permissible temperature.
4. Earthing is electrical connection of'a part to be earthed to ship’s hull.
в) Парная работа. Обговорите детально эти понятия и определения со своим партнером.
27. / 6 мин./ Прореагируйте соответствующим образом на каждое из услышанных/прочитанных заданий.
1. Describe the means against overload. 2. Name your actions during erection of induction machines. 3. List diagrams & instructions for induction machines.
28. / 4 мин./ Прослушайте/прочтите вопросы и дайте на них ответы.
1. What must you quote when ordering spares, & in all correspondence? 2. When must you check with thetfirm the appliance of the machine? 3. How in your opinion must the water flow rate be measured?
29. / 3 мин./ Прослушайте/прочтите 3 коротких информации и скажите, о каком типе двигателя идет речь в каждой из них.
A. Constant or adjustable speed is needed, & starting conditions are moderate. Applications: fans, centrifugal pumps, elevators.
B. High starting torque istombined with fairly constant speed. Used on geared elevators.
C. High starting torque is needed. Speed can be regulated for hoists.
30. / 18 мин./ а) Отработайте чтение основного текста, следя по книге и повторяя за диктором в паузах, б) Не глядя в текст, >1>
закрепите правильность произношения и интонации, вторично слушая диктора и повторяя за ним в паузах.
31. / 4 мин./ Дважды прослушайте/прочтите и запомните диалог.
A Student of Principles
