6. Choose the right word:

1.крутитися - to correspond, to move, to revolve

2.закривати - to need, to shut, to drive

3.виходити - to escape, to let, to allow

4.качати - to have, to pump, to exhaust

5.передавати - to give, to admit, to transmit

Unit 20 Operation of a four-cylinder engine

1. Memorize the new words and word-combinations:

1.sequence, succession

2.to be aware

3.continuous

4.motive

5.to release

6.reciprocating

7.to convert

8.to employ

9.to admit

послідовність

знати

подовжений

рухівний

звільнювати

зворотно-поступальний

перетворювати

використовувати

приймати

2.Translate complex words:

motor-cycle, motor-car, single-cylinder engine, three-wheel car, six- or eight-cylinder car

3. Choose the right translation:

1. установка упередження запалювання

2. послідовність операцій

3. у кінці такту стиску (напередодні запалювання)

4. унизу (у кінці такту впуску)

5. порядок запалювання

6. хід впуску, такт впуску

7. хід (такт) стиску

8. хід (такт) випуску

9. робочий хід

a) sequence of operations

b) ignition timing

c) compression stroke

d) induction stroke

e) exhaust stroke

f) power stroke

g) at the top of the compression stroke

h) at the bottom of the induction stroke

i) firing order

3. Read and translate the text. Operation of a four-cylinder engine

The crankshaft is so designed, and the valve and ignition timing so arranged, that the cylinders fire one after the other in quick succession. If we regard the cylinder at the front of the engine as No l, the usual firing order of a four-cylinder engine is 1-3-4-2. This means that at any time moment all the pistons are in a different stage of the operating sequence.

For example: with No 1, piston at the top of the compression stroke (about to fire), No 3 piston is at the bottom of the induction stroke, No 4 piston is at the top of the exhaust stroke, and No 2 piston is at the bottom of the power stroke.

In a single-cylinder engine of the type commonly used on a motor-cycle, or in a small three-wheeler car, a distinct «beat» can be heard each time the cylinder fires. As the number of cylinders increase, the «beat» becomes less definite so that in a six- or eight-cylinder engine it is heard as an almost continuous sound.

4. Choose the right form of the verb and translate:

a) .............. 300 thousand dollars he bought a Mercedes.

(won, having won, winning);

b) The car ............. Along the street is of unknown model.

(hurrying, having hurried, had hurried);

c)The bus .............. yesterday was not yet removed from the roadside.

(having broken, broken, broke)