Where should chalk marks indicate the position of couplings on hoses during testing?

• A. On The Nozzle Head
• B. On The Ground Under The Hose
• C. On The Test Gauge
• D. On The Hose Jackets Near Each Coupling

Answer: (D)

During hose testing, chalk marks are placed on the hose jackets near each coupling so you have a fixed reference that travels with the hose. If a coupling slips or rotates under pressure, the distance or alignment between the mark and the coupling changes, making movement easy to see. This location directly monitors the interface between the hose and its couplings, which is what you’re testing for. Marking the nozzle head, the ground under the hose, or the test gauge wouldn’t reliably reveal coupling movement, since those points don’t stay aligned with the coupling as the hose is stressed.