USCG Exam PracticeHydraulics and pneumatics
According to NAVEDTRA 14075 §7-2, what is identified as the leading cause of trouble in hydraulic systems?
- A. Water contamination causing spongy operation
- B. Trapped air causing jerky motion
- ✓ Dirt scoring pumps and valves and jamming close-fitting spoolsCorrect
- D. Worn or sticking directional-control valves
Why C is correct
NAVEDTRA 14075 §7-2 explicitly states that dirt is the leading cause of hydraulic trouble because it scores pumps and valves and jams close-fitting spools. Water contamination, trapped air, and worn valves are all identified as real problems in the same source but are not designated the leading cause.
Cited:NAVEDTRA 14075 §7-2