USCG Exam PracticeHydraulics and pneumatics
A pneumatic system aboard a vessel has a maximum allowable working pressure of 200 psi. Under 46 CFR §58.30-5, what design feature is specifically required for this system?
- A. A two-stage compressor with an intercooler
- ✓ A surge tank or other acceptable means of pulsation dampeningCorrect
- C. A nonmetallic flexible hose assembly meeting SAE J1475
- D. A holding device to prevent uncontrolled movement on loss of pressure
Why B is correct
46 CFR §58.30-5(c) states that pneumatic systems with a maximum allowable working pressure in excess of 150 psi must be designed with a surge tank or other acceptable means of pulsation dampening. At 200 psi this system exceeds the 150 psi threshold and therefore requires this feature.
Cited:46 CFR §58.30-5