USCG Exam PracticePumps, valves, and piping systems
Under 46 CFR §56.07-10, relief valves are required at pump discharges EXCEPT for which type of pump under a specific condition?
- A. Reciprocating pumps designed so that discharge pressure cannot exceed system maximum allowable working pressure
- ✓ Centrifugal pumps so designed and applied that a pressure in excess of the system maximum allowable working pressure cannot be developedCorrect
- C. Gear pumps installed on fuel oil transfer systems
- D. Diaphragm pumps used exclusively in bilge service
Why B is correct
46 CFR §56.07-10(b)(1) states that relief valves are required at pump discharges except for centrifugal pumps so designed and applied that a pressure in excess of the maximum allowable working pressure for the system cannot be developed. No similar exception is granted for reciprocating, gear, or diaphragm pumps.
Cited:46 CFR §56.07-10