English for automobile engineering - Unit 4: Manual operation

UNIT 4Lecturer: Lang Van ThangENGLISH FOR AUTOMOBILE ENGINEERINGMANUAL OPERATION Select the correct instructions for the actions in Figure 4.1:For example: A = 21. Turn the jack handle anticlockwise to lower the car.2. Turn the gear wheel anticlockwise to raise the drill.3. Turn the bolt clockwise to tighten it.4. Press the top button to stop the motor.5. Press the largest pedal to stop the car.6. Pull the handle down to cut the metal bar.7. Push the bar down to raise the loadPresentation Practice 1Use the diagrams below and words in the presentation to complete the instructions:Practice 2Read the instructions for checking a spark plug; then put them in the correct order. Remove the plug from the socket.Place the spanner over the spark plug.Replace the spark plug in the socket.Insert the gauge in the gap.Remove the cover.Examine the gap and check that it is clean.Rotate the plug anticlockwise until it is loose.Check that the gap is between 0.65 and 1.00 mm wide.Replace the cover.Rotate the plug clockwise until it is hand-tight.Place the spanner over the plug and give a quarter turn clockwise.Caution: do not over-tighten the plug.Practice 3Read the instructions for changing a tyre; then put them in the correct order.Practice 4Read the instructions for the dynamo belt on the left; then complete the instructions for the alternator belt on the right:Slacken mounting bolts A and B.Slacken the slide bolt C.Either: a. pull the dynamo up to tighten the belt.or : b. push the dynamo down to slacken the belt.4. Tighten the slide bolt.5. Tighten the mounting bolts. Fan belt adjustment on models with a dynamo.Practice 4Fan belt adjustment on models with an alternator._________________________ __________________________________________________ _________________________ Either: a. _______________________ _______________________or: b. _______________________ _______________________________________________________________________________________________________________________________Practice 5a. Cover the car components. Can you remember which nouns can follow which verbs: complete the table:Open/closeAdjust Switch on/offcheckPractice 5b. Now work with a partner to answer the following questions. Using phrases from the table above.What do you do when______________visibility is poor because of fog?your seat is too low?you think you need oil?you want to gat out of the car?you can’t see the cars behind you properly?it’s getting dark:you want to look at the engine?your steering wheel is too high?you think your tyre pressure is low?you need your road map?it’s warm and sunny?your passenger has no legroom in the back?Development Read the text, label Figure 4.2 and solve the problemIn a petrol engine, the movement of the pistons between the bottom and top of the cylinder is termed the piston stroke. The highest position of the piston is called the Top Dead Centre (TDC) position (see Figure 4.2). When the piston is in this position, the volume between the cylinder head and the top of the piston is known as the clearance volume.The lowest position of the piston is called the Bottom Dead Centre (BDC) position. The difference between the clearance volume and the total volume when the piston is in the BDC position is called the working volume. In other words, to find the working volume, multiply the length of the piston stroke by the cross-sectional area of the cylinder.To find the compression ratio of an engine, divide the total volume when the piston is in the BDC position (i.e. the working volume + clearance volume) by the clearance volume. Therefore, for the engine in figure 4.2:(_______ + ______) / _______ =The engine therefore has a _____ : _____ compression ratio.