Home › CDL Practice Tests › General Knowledge Questions › Question 373
What is the correct way to warm up and cool down a diesel engine in relation to the turbocharger?
- A.Idle briefly after starting to establish oil flow, and idle a short cool-down before shutdown after hard work so the turbo is not left spinning without oil
- B.Race the engine immediately after starting
- C.Shut down instantly after a hard pull
- D.Turbochargers need no oil
Correct answer
A. Idle briefly after starting to establish oil flow, and idle a short cool-down before shutdown after hard work so the turbo is not left spinning without oil
Why
The turbocharger spins at very high speed and depends on engine oil for lubrication and cooling. A short idle at both ends of hard work protects its bearings, while immediate shutdown after a climb can cook the oil left inside it.
Manual topic: Engine Controls - Turbo · From the General Knowledge practice bank (GK-373).