When testing hose, lengths of hose should not exceed _________ ft.

• A. 200
• B. 300
• C. 400
• D. 600

Answer: (B)

During hydrostatic testing of hose, keeping lengths to about 300 feet helps ensure the test pressure can be applied and maintained along the entire run. Friction losses increase with longer hose, so if the length is much greater, the pressure at the far end can drop enough to mask leaks or weak spots and to challenge the pump’s ability to sustain the test. A 300-foot limit strikes a practical balance: long enough to test a meaningful length, but short enough to keep friction losses and pump requirements within the testing setup’s capabilities. Longer lengths, like 400 or 600 feet, would introduce excessive pressure drop and make the test unreliable, while shorter lengths such as 200 feet would underrepresent typical service lengths.