Question 192Motor Plants - QMED

The correct answer is A) By listening for cyclic changes in turbocharger sound pitch. Turbocharger surging is characterized by cyclic changes in the turbocharger's speed, which can be detected by listening for fluctuations in the sound pitch produced by the turbocharger. This is because the turbocharger's speed directly affects the frequency of the sound it generates, resulting in a cyclic change in the pitch that can be heard. The other options are incorrect because they do not directly indicate turbocharger surging. Checking for cyclic changes in turbocharger sump oil levels (B), charge air temperature (C), or exhaust gas temperature (D) may provide indirect evidence of turbocharger surging, but they do not directly measure the turbocharger's speed and fluctuations.