A common style of BNC connector is ___.

• A. liquidtight connector
• B. compression connector
• C. modular connector
• D. none of these

Answer: (B)

BNC connectors are defined by a twist-and-lock style called a bayonet coupling. The name BNC itself hints at this: it uses two bayonet lugs on the connector that fit into slots on the jack, then a quick quarter-turn locks the connection in place. This design gives a secure, repeatable RF connection that’s easy to connect and disconnect, which is why you’ll see it widely in test equipment, video, and RF applications.

The other styles mentioned describe different ways of making coax connections. A compression connector relies on compressing a portion of the conductor or a ferrule to make contact, which isn’t the characteristic feature of a BNC. Liquidtight connectors are used to seal conduit entries, not for coax signal connections. Modular connectors refer to dry-network-style connectors (like RJ-type) rather than coax. Because of that, the hallmark feature of a BNC is its bayonet twist-lock, not compression.