USCG Exam PracticeHydraulics and pneumatics
According to 46 CFR §58.30-20, which of the following statements regarding nonmetallic flexible hose assemblies in fluid power systems is correct?
- A. Hose assemblies may be used anywhere in the system provided they are rated for the maximum operating pressure.
- ✓ Hose assemblies must not be subjected to torsional deflection under any conditions of operation.Correct
- C. Sharp bends are permissible provided the bend radius does not exceed the hose manufacturer's minimum.
- D. Hose assemblies are limited to a maximum length of 30 inches in any application.
Why B is correct
46 CFR §58.30-20(c) states that hose assemblies must not be subjected to torsional deflection (twisting) under any conditions of operation. The same section also requires that sharp bends be avoided (§58.30-20(d)). The 30-inch length limit appears in §28.405(i), which applies to a different vessel category, not to the systems listed under §58.30-1.
Cited:46 CFR §58.30-20