Car Driving Test 18

1. What color is the smoke produced due to unburnt fuel in a diesel engine?

2. White smoke from a diesel engine is often a sign of:

3. Blue smoke from an engine typically indicates:

4. Which component's failure can result in black smoke due to incorrect fuel injection timing?

5. A clogged air filter can cause which of the following?

6. What does excessive black smoke indicate about the air-fuel ratio?

7. Which type of smoke usually occurs at engine start in cold weather?

8. Leaking valve seals are most likely to cause:

9. Turbocharger failure can lead to which type of smoke?

10. Which fuel system issue can lead to incomplete combustion and black smoke?

11. What can cause white smoke from a petrol engine?

12. Which of these can reduce black smoke emissions?

13. Excessive oil consumption is indicated by which type of smoke?

14. Diesel engines produce black smoke when:

15. An engine with black smoke and rough idle likely has:

16. What is a common cause of engine overheating?

17. Which component cools the engine by circulating coolant?

18. A failed radiator fan typically causes overheating:

19. Low coolant level may be caused by:

20. What role does the thermostat play in an engine?

21. Which sensor monitors engine temperature?

22. What can happen if the head gasket fails?

23. A boiling coolant reservoir usually indicates:

24. A slipping fan belt can cause overheating by:

25. Why might a radiator cap cause overheating?

26. What does it mean if the heater blows cold air while the engine is hot?

27. Which of the following would help prevent overheating?

28. Overheating can damage the:

29. What might cause overheating after a coolant flush?

30. If an engine overheats and then won’t start, what is a possible cause?