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, erratic operation
- B. Trapped air causing jerky motion in actuators
- ✓ Dirt, which scores pumps and valves and jams close-fitting spoolsCorrect
- D. Overpressure events caused by improperly set relief valves
Why C is correct
NAVEDTRA 14075 §7-2 explicitly identifies dirt as the leading cause of hydraulic trouble because it scores pumps and valves and jams close-fitting spools. While water and air contamination also cause problems (spongy, erratic operation), dirt is cited as the primary culprit.
Cited:NAVEDTRA 14075 §7-2