How to check if a turbo is working?

As a cryptocurrency and finance professional, I'm often faced with technical challenges outside of my core domain. However, when it comes to the question of "How to check if a turbo is working?" my automotive knowledge comes to the fore. For those unfamiliar with the term, a turbocharger is a device used to increase the power of an internal combustion engine. To ensure a turbo is functioning properly, one should first listen for any unusual noises such as rattling or whining while the engine is running. These could be indications of internal damage. Secondly, observe the exhaust smoke. Blue or black smoke could be a sign of oil leakage or excessive fuel burn. Additionally, check the boost pressure gauge if the vehicle is equipped with one. Low or fluctuating pressure could mean the turbo isn't performing optimally. Finally, if possible, visually inspect the turbocharger for any external damage or leaks. While these steps are basic, they can help provide a starting point for diagnosing turbo issues.