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Garage Door Technician
Garage Door Installation & Setup Certification
Bottom Brackets, Weatherseal & Insulation
Knowledge Check
Bottom Brackets, Weatherseal & Insulation
Knowledge Check
Knowledge Check
1 / 7
What is required on every extension spring installation?
A
A rubber coating on the spring
B
A warning label only
C
A safety cable threaded through the center of the spring
D
A padlock on the spring mount
Check Answer
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