USCG Exam PracticeHydraulics and pneumatics
Under 46 CFR §58.30-5, a pneumatic system with a maximum allowable working pressure exceeding 150 psi must be equipped with which of the following?
- A. A moisture separator on the compressor discharge
- ✓ A surge tank or other acceptable means of pulsation dampeningCorrect
- C. An intercooler between compression stages
- D. A fusible plug on each air receiver
Why B is correct
46 CFR §58.30-5(c) specifically requires that pneumatic systems with a maximum allowable working pressure in excess of 150 psi be designed with a surge tank or other acceptable means of pulsation dampening. Intercoolers and moisture separators are good engineering practice addressed elsewhere but are not the requirement stated in this section.
Cited:46 CFR §58.30-5