In a lorry that has a braking system with compressed air (air brakes), where should the driver direct his attention mainly?
To the way the brakes act. | |
The way the footbrake pedal goes down, when pressed. | |
To the indications of the manometers on the dashboard. |
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. | |
On the sides of the tread. | |
Only on the internal side of the tread. |
When the exhaust gases of the diesel engine are very dark, what is the possible cause?
Low pressure of the cylinder. | |
Defective supply of the injection pump. | |
Low temperature of the engine. |
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. |
What causes overheating of the engine?
Malfunction of the thermostat. | |
Excessive fuel consumption. | |
Increase of the external temperature. |
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. |
When the diesel-engine emits excessive soot (smoke), what should you do?
Change the lubrication oil. | |
Immediately repair the engine. | |
Check and regulate the pump and fuel injectors and clean the air filter. |
Engine air filter must be cleaned:
For the reduction of oil consumption. | |
For facilitating the suction of the normal air quantity without any obstacles. | |
For the better cleaning of the air. |
A low temperature of the engine is noted. What may be the possible cause?
A failure of the thermostat. | |
A power-cut of the fan. | |
Small capacity of the radiator. |
Which vehicles does this traffic sign concern?
Vehicles carrying hazardous materials. | |
Vehicles carrying over a certain quantity of materials that may cause water pollution. | |
Vehicles carrying over a certain quantity of explosive or inflammable materials. |