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Garage Door Technician
Garage Door Installation & Setup Certification
Lift Cable & Drum Systems
Knowledge Check
Lift Cable & Drum Systems
Knowledge Check
Knowledge Check
1 / 9
What happens when a cable drum is undersized for the door height?
A
The spring lasts longer
B
Cable jump occurs - cable wraps over itself
C
The door moves faster
D
The door becomes quieter
Check Answer
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