Which term is used for the measurement of steam pressure, representing pounds per square inch?

The term used for the measurement of steam pressure in pounds per square inch is PSI, which stands for "pounds per square inch." This unit specifically quantifies pressure, making it particularly relevant in various industrial and engineering applications, including those involving steam systems. Understanding pressure measurements is crucial for managing systems that operate under high pressure, such as boilers and HVAC systems, where safety and efficiency depend on accurate pressure monitoring.

Other options, while related to pressure measurements, do not represent the same unit of measure as PSI. MBAR refers to millibars, which are commonly used in meteorology for measuring atmospheric pressure. ATM stands for atmospheres, another metric used for measuring pressure, but it is not directly equivalent to pounds per square inch. PM is not a standard unit of pressure measurement, so it does not correspond to the concept of steam pressure as represented in PSI.