During Big Gate duties, what should be removed from the hydrant when the apparatus is stopped?

• A. Steamer cap
• B. Hydrant gate
• C. Hose
• D. Radiator cap

Answer: (A)

The main idea here is how to properly handle hydrant attachments when finishing a Big Gate operation. The part that should come off the hydrant when you stop is the steamer cap—the cap that seals the large steamer outlet on the hydrant.

Removing the steamer cap allows any water in the steamer line to drain and relieves residual pressure. This helps prevent water hammer and protects the steamer connection from pressure-related damage. It also ensures the hydrant is ready for the next use and prevents the cap from being left on or damaged. The hydrant gate stays in place, hoses are managed separately, and a radiator cap isn’t part of hydrant operation.