Q. A pressure cooker on a stove with its lid tightly closed and the whistle in position is an example of:
Answer: closed system
Notes: A pressure cooker on a stove with its lid tightly closed and the whistle in position is an example of a closed-system thermodynamic process. In a closed-system thermodynamic process, the container (in this case, the pressure cooker) is sealed, and there is no exchange of matter with the surroundings. The pressure cooker is designed to be airtight, so no air or steam can escape while it's cooking. This sealed environment allows for the buildup of pressure and temperature inside the cooker, which, in turn, speeds up the cooking process.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 7 in Physics GK 09 - Pressure in above course in App.