Final answer:
The correct answer is D. Maximum Allowable Working Pressure (MWAP).
Step-by-step explanation:
This term refers to the highest pressure at which a vessel, such as a boiler or pressure tank, is allowed to operate safely under specific conditions and as determined by engineering standards and principles. This concept is important in fields like mechanical engineering and safety engineering, ensuring that pressure vessels operate within safe limits to prevent accidents and failures.
Understanding MWAP is crucial when applying concepts of pressure-volume work in thermodynamics. In the equation PAV = -w, the product PAV represents the work done during expansion, where P stands for pressure, AV is the change in volume, and w represents work. According to the equation, the work (w) done by or on the system during expansion or compression will have a sign opposite to the change in volume (AV).