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Section 19

1. Engine air filter must be cleaned:

For the reduction of oil consumption.
For the better cleaning of the air.
For facilitating the suction of the normal air quantity without any obstacles.

2. When the diesel-engine emits excessive soot (smoke), what should you do?

Check and regulate the pump and fuel injectors and clean the air filter.
Change the lubrication oil.
Immediately repair the engine.

3. When the disengagement is difficult, what is the possible cause?

The disc is fixed on the flywheel.
The friction materials may have been overheated.
Oil or grease may exist in the friction materials.

4. What causes overheating of the engine?

Excessive fuel consumption.
Increase of the external temperature.
Malfunction of the thermostat.

5. You notice that the diesel engine of your lorry, while started, stops after a few revolutions. What may be the cause of this?

Obstruction of the feeding system.
Low compression of the cylinders.
Improper internal timing of the injection pump.

6. If your tyres of your car have a pressure higher than the normal, where will they present an increased wear?

On the middle (centre) of the tread.
Only on the internal side of the tread.
On the sides of the tread.

7. In a lorry that has a braking system with compressed air (air brakes), where should the driver direct his attention mainly?

To the indications of the manometers on the dashboard.
The way the footbrake pedal goes down, when pressed.
To the way the brakes act.

8. You notice that one air container of the braking system with compressed air (air brake) has holed. What should you do:

Ensure its immediate replacement.
Isolate it from the rest of the circuit.
Ensure its repair through welding.

9. You notice that in the exhaust gases of a diesel engine there is a white fume. What is the possible cause of this?

Great oil consumption.
The diesel engine has been overheated.
Water has entered the cylinders.

10. What does it mean when the oil warning light on the dashboard is on during the movement of the car?

That lubrication is normal.
That the generator (dynamo) does not charge the battery.
That oil pressure is insufficient.

RESULT

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Passed

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