A supply register is installed but the duct branch is disconnected in the attic. What is the problem?
Correct Answer
C) Air is not delivered.
A disconnected duct branch wastes conditioned air and prevents delivery to the intended room.
Why This Is the Correct Answer
A disconnected duct branch wastes conditioned air and prevents delivery to the intended room.
Why the Other Options Are Wrong
Option A: Combustion air.
Combustion air. addresses a neighboring field issue, but not the condition or method control required for hvac duct coordination.
Option B: Compaction proof.
Compaction proof. addresses a neighboring field issue, but not the condition or method control required for hvac duct coordination.
Option D: Connector damage.
Connector damage. addresses a neighboring field issue, but not the condition or method control required for hvac duct coordination.
Memory Technique
Hvac Duct Coordination method for Troubleshooting Rough-In: condition first, tool second.
Reference Hint
Study anchor (closed-book): memorize HVAC duct coordination from California Mechanical Code, California Code of Regulations Title 24. / Title 24 California Mechanical Code duct installation concepts; know the rule or calculation trigger without relying on exam-room lookup.
More Class B Trade Questions
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