Which term describes a phenomenon that can cause undesired or unpredicted conditions that reduce capacities in all or part of a system and cannot be measured directly but can be estimated?

Which term describes a phenomenon that can cause undesired or unpredicted conditions that reduce capacities in all or part of a system and cannot be measured directly but can be estimated?

• A. System Effect
• B. Total Dynamic Head (TDH)
• C. Terminal Device
• D. Terminal Unit

Answer: (A)