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North Carolina Fireground Operations 8 Practice Test

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Which coupling must be threaded together between ends?
Correct Answer:
Threaded Hose Coupling
Explanation:
A hose connection that uses threads must be twisted together to join the ends. Threaded hose couplings have male and female threads that screw together, forming a tight, watertight seal as you tighten them. This is different from quick-connect styles, which lock without threads—push-on couplings rely on friction or locking mechanisms, Storz couplings lock with a quarter-turn and don’t require threading, and a Siamese fitting is a manifold that combines two lines and may use various connection types but isn’t defined by threading ends of a single hose. So the option describing a threaded hose coupling is the one that inherently requires threading between the ends to connect.

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