Once the test has begun, candidates will not be allowed to leave the facility, so plan accordingly. Candidates will be required to complete a confidentiality agreement which precludes sharing test information until the examination in progress is completed. Candidates violating the confidentiality agreement will have their names removed from the eligibility list. For a given flow velocity, friction loss is approximately the same, regardless of the pressure on the water. If all other conditions are the same, friction loss varies inversely with the length of the hose or pipe.
Friction loss develops much more slowly than the change in water velocity.
The rougher the inner surface of a pipe or hose, the less friction loss that occurs.