EXERCISES. 1. Answer the questions

1. Answer the questions.

1. What is a good signal of abnormal operation?

2. Why is it necessary to replace worn parts?

3. In what case is it necessary to set new pistons?

4. What do you do if you have piston wear?

5. Which mechanism faults cause compression reduction?

6. Is it necessary to repair the engine if you have the wear of rings, bushes or cylinder walls?

7. How do you wash the cylinder?

8. When is the cylinder head fitting not tight?

9. What do you do to replace the gasket?

10. What faults can be detected in the gas-distributive mechanism?

2. Express your agreement or disagreement with the following statements.

1. Clatters in the crank mechanism are a good signal of abnormal operation.

2. Clatters in the crank mechanism can be the result of a cooling system fault.

3. Worn piston rings can be replaced with new ones.

4. The clatters are the result of reduction of the cylinder diameter.

5. Faults in the crank mechanism cause pressure reduction.

6. If we have wear of the rings, cylinder walls or bushes - the engine should be repaired.

7. If the cylinders have scratches on the operating surface, replace these cylinders.

8. If you have a damaged gasket, tighten it.

9. Faults in the gas-distributive mechanism cause compression reduction.

10. The valve mechanism does not operate when the valves are closed.

3. Name the parts, need to be repaired or replaced in case of pressure reduction.

1. Wearing of the rings...

2. Scratches on...

3. The piston rings sticking...

4. The unit head fitting...

4. Name the verbs describing operations for gasket replacement.

5. Guess, what is wrong?

1. It deals with the valves and it causes compression reduction and sometimes engine power reduction.

2. Wear in the gears, bearings and camshaft neck causes clatters during engine operation.

6. Read the dialogue.

Date: 2015-10-18; view: 421; Нарушение авторских прав