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Section 15

1. How often should the driver check the engine oil quantity?
  • Before setting out on a long journey.
  • Daily.
  • When the lamp of oil pressure is on.
2. When the starter motor (ignition) does not switch on, which is the possible cause of that?
  • There is a power cut between battery and starter motor.
  • The multiplier does not work properly.
  • The belt is broken.
3. When the diesel-engine emits soot (smoke), what should you do?
  • Immediately repair the engine.
  • Change the lubrication oil.
  • Check and regulate the pump and fuel injectors and clean the air filter.
4. You notice that the diesel engine of your bus, while started, stops after a few revolutions. What may the cause of this be?
  • Obstruction of the feeding system.
  • Improper internal timing of the injection pump.
  • Low compression of the cylinders.
5. When the feeding system is well adjusted, what is the cause of the blue fume from a diesel engine?
  • The engine consumes a lot of oil.
  • The engine does not have a normal ignition advance.
  • The driver drives at a high speed.
6. If your car’s tyres have a pressure higher than the normal, where will they show 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. You notice that the 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.
8. You ascertain 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.
9. The malfunctioning shock absorbers cause:
  • Irregular function of the engine.
  • Abnormal behaviour of the vehicle, especially on bends.
  • Smaller lateral tilt of the vehicle on bends.
10. The aim of the anti-freeze fluid pump in a braking system with compressed air is to:
  • Maintain system’s pressure steady.
  • Feed the system with compressed air, so that rates of higher and lower function pressure are maintained steady in the air containers.
  • Inject the compressed air with anti-freeze fluid, so that the various components do not freeze at very low temperatures
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