USCG Exam PracticeDiesel engine principles (motor propulsion)
In a marine diesel starting-air system, why must accumulated condensate be drained from the receivers and separators as a routine watch task?
- A. Water lowers the pressure in the receivers, reducing available starting torque
- ✓ Water carried into the cylinders defeats starting and can cause corrosionCorrect
- C. Water reacts with lube oil in the air lines to form sludge that blocks the distributor
- D. Water increases the risk of detonation in the starting-air manifold
Why B is correct
DOE-HDBK-1018 Vol.1 §1-5 states that water carried into the cylinders defeats starting and can cause corrosion, making condensate drainage a required routine watch task on starting-air systems.
Cited:DOE-HDBK-1018 Vol.1 §1-5