Which of the following is NOT a cause of pressure problems?

Room temperature is not a direct cause of pressure problems in systems that rely on fluids, such as pumps or valves. Pressure issues are primarily linked to mechanical failures or wear within components that manipulate the flow of those fluids. Factors such as damaged pumps can lead to decreased efficiency or leaks, while worn valves may not open or close properly, resulting in incorrect pressure regulation. Worn components in motors can also affect the performance of the entire system, impacting pressure indirectly through reduced operational capability.

Room temperature, while it can have an effect on the viscosity of fluids and potentially influence overall system dynamics, does not inherently cause pressure problems. The other options are all mechanical factors that directly compromise the performance and integrity of a pressure system, making them significant contributors to pressure-related issues.