True or False: Hydro testing is allowed on FE hose assemblies with a shut off nozzle at the end of the hose.

Hydro testing, which involves using water under pressure to test the integrity and strength of hoses, is not allowed on fire hose assemblies that have a shut-off nozzle at the end. This restriction primarily exists because a shut-off nozzle can trap water within the hose assembly during the test, potentially leading to an increase in pressure that the nozzle is not designed to withstand. This condition can cause damage to the nozzle or the hose, making it unsafe for future use.

In contrast, hydro testing is generally permissible for hose assemblies that do not have such components attached at the end, as it allows for a proper and safe assessment of the hose's condition. Therefore, the answer that hydro testing is not allowed on FE hose assemblies with a shut-off nozzle is accurate.