Mr Green /his subordinate/: I’m glad to hear it, sir! & what dti you think of my boiler?
Mr P ./gravely/: You had been told, I believe, before you started working in my design office, that you had to base your design on scientific data!
Mr G./surprised/: It goes without saying, sir, & yet I feel an allowance must be made for the invedtive genius of...
Mr P./in>;terrupting/: For the inventive genius, but not for the ignorance of the designer! Now. Looif’/iere, Mr Green, the pressure inside the boiler had been determjifed before you estimated the thickness of its wails, hadn’t it?l
Mr G.: Of course it had...
Mr P.: Hence you had either taken the wrong figure or hadn’ taken the pressure into account at a}l!
Mr G.: Oh, why?!
Mr P.: Before I offered you the job I’d expected...
Mr G.: I admit it’s a little out of the ordinary but it’s typica .. When I first went to school I was mechanically-minded, & s "6f independent ideas. I had taken dad’s bike to pieces to saj
nothing of the .wireless...
Mr P./inerrupting angrily/: Never mind about that at the moment. 1 must tell you, Mr Green, & I feel strongly about it; either the pressure is too high or the walls are not thick enough.
Mr G./more than surprised/: Really?!
Mr Р./furiously/: Oh, dash it! The boiler may burst!
Mr G./proudly/: It must burst!
Mr Р./thunderstruck/: Have you gone mad?!
Mr G.: Just a moment, sir. Before I started designing the boiler, a firm had already bought it!..
Mr P.: What firm?
Mr G./proudly/: Our rivals!
Mr P.: You’re not so green after all... j 19. /2 мин./ Прослушайте/прочтите 10 рядов слов. В начале
каждого ряда произносится тестовое слово, за ним следуют 4 дру-! гих, одно из которых близко по значению к тестовому. Назовите это слово.
Model, folks: methods-strength-people-habits. People.
1. work: harbour-song-operation-reactance >v
2. shut: watch-close-pull-raise
3. value: amount-power-supply-torque
4. help: induce-cause-assist-develop
5. principle: important-polite-efficient-main
6. several: nice-some-good-robust
7. sufficient: possible-understand-fjne-enough
8. close: pretty-small-near-poor
9. complete: try-do-stay-finish
10. lift: start-raise-give-take
20. /.6 мин./ а/ Прослушайте/прочтите информацию об асинхронном двигателе. Постарайтесь понять м запомнить информацию. б/ Запишите со слуха или из книги следующие слова. Используя их, скажите по-английски, когда был открыт принцип асинхронного двигателя и какое явление при этом демонстрировалось.
to discover, phenomenon, non-magrietic disk, compass, to pivot /вращаться/, axis /ось/, pole, to locate, edge /край/, to rotate, to spin/вертеть, вращать/, to impart/наделять, сообщать/.
1. The principle of the induction motor was first discovered in 1824, when the following interesting phenomenon was shown: if a non magnetic disk & a compass are pivoted with their axes parallel, so that one or both of the compass poles are located near the edge of the disk, the compass will rotate if the disk is made to spin, or the disk will rotate if the compass is made to spin.
2. The direction of the induced rotation in one element is always the same as that imparted to the other.
21. /3 мин./ Прореагируйте соответствующим образом на каждое из услышанных/прочитанных заданий.
1. List the main parts of induction motors. 2. Explain hofv you arrive at the conclusion that a great majority of the motors used aboard ships are designed to operate on a-c. 3. Give the formula to determine the resistance of the conductor.
22. /4 мин./ Прослушайте/прочтите вопросы и дайте на них ответы.
1. What are in your opinion 5 advantages of induction motors over those of dc motors? 2. What is the principle of operation of induction motors? 3. What are the most common types 6Г motors?
23. /3 мин./ Прослушайте/прочтите три коротких информации и скажите, о каком типе двигателя идет речь в каждом из них.
A. The motors operate at synchronous speed for all values of load. There are several constructions of sifch machines, although they are usually manufactured in very small ratings.
