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National Environmental Balancing Bureau (NEBB) Certified Professional (CP) Practice Exam

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Which term refers to any installation, measurement, or finding outside tolerances?
Correct Answer:
Deficiency
Explanation:
Deficiency refers to any installation, measurement, or finding outside tolerances defined by project specs, standards, or manufacturer data. In NEBB CP practice, when a balancing or commissioning activity reveals a damper not at the required position, a flow or pressure outside the allowable range, or a missing/incorrect component, that result is recorded as a deficiency to be corrected and re-verified. The other terms don’t capture this concept: differential pressure is just a measured pressure difference, DX is a refrigeration/coil designation, and diffuser is an air-distribution device.

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