6. Match synonyms:

1.circular

2.to make

3.tube

4.to come up

5.to fire

6.to go round

7.petrol

8.too

a) to move round

b) round-and-round

c) gasoline

d) to cause

e) to rise

f) pipe

g) to ignite

h) also

Unit 3 Carburetor

1. Memorize the new words and word-combinations:

1.container, chamber

2.float

3.needle valve

4.choke tube

5.thtrottle valve

6.coin

7.jet

8.crankshaft

9.camshaft

10.rocker arm

11.round-and-round movement

12. up-and-down movement

13. plug

14.spring

камера

поплавець

голчатий клапан

дифузор

дросельна заслінка

монета

жиклер

колінчатий вал

кулачковий вал

коромисло

обертальний рух

зворотньо-поступовий рух

важіль

пружина

2.Translate the word-combinations:

needle valve, choke tube, to break up into, throttle valve, crankshaft, round-and-round movement, camshaft, to ride a bicycle, rocker arm, gear wheel, car wheels, up-and-down movement

3.Translate the international words:

Pedal, accelerator, automatic, energy, to control, block, metal, cylinder, gas, cycle, compression, system, container

4. Read and translate the text. Carburetor

The carburetor has two main parts. There is a container (chamber) which controls the flow of petrol. The pump forces the petrol through a pipe into the chamber. There is a float in the chamber. If the chamber is full, the float rises. This causes the needle valve to close. Petrol cannot enter. As the chamber empties, the float sinks. The valve opens. More petrol enters the chamber. There is also a choke tube. This tube is open at the top so that air can be sucked in. Pipes lead from the bottom of the tube to the inlet valves of the cylinders. The air and petrol mixture is sucked through these pipes into the cylinders. A throttle valve controls this flow of mixture. This is a round piece of metal like a large coin. It is moved by the accelerator pedal. A small pipe leads from the chamber to the choke tube. The petrol flows through this. There are very small holes (jets) at the end of the pipe. As the induction stroke sucks air down the tube, it also sucks petrol through these jets. The petrol is broken up into thousands of very small drops to form a vapour. It mixes with the air. The mixture is sucked into the cylinder. When the accelerator pedal is pushed down, the throttle is opened. More air is sucked into a carburettor. More petrol and air mixture goes to the cylinders. The explosions in the cylinders are stronger. The car goes quicker. When the pedal is let out, the throttle closes. There is less mixture. The explosions are weaker. The car goes slower.

5. Answer the questions:

1) How many parts has the carburetor?

2) Where does a small pipe lead?

3) When is the throttle opened?

4) Why does the car go quicker?

6.Choose the right translation of the first word of the row:

1.важіль - thing; air; plug; lever

2.пpужина - electricity; tooth; spring; valve