USCG Exam PracticeDiesel engine principles (motor propulsion)
The starting-air receivers on a reversible main diesel engine are required to hold enough air for how many consecutive starts before recharging, and what routine watch task is essential to maintain that capacity?
- A. Six starts; testing the master starting valve for proper seating
- ✓ Twelve starts; draining accumulated condensate from receivers and separatorsCorrect
- C. Twelve starts; checking and topping up the lube-oil level in the air compressor
- D. Six starts; verifying that flame arrestors are installed on the starting-air manifold
Why B is correct
Receivers for a reversible main engine commonly hold enough air for twelve consecutive starts. Draining accumulated condensate from receivers and separators is cited as the essential routine watch task, because water carried into the cylinders defeats starting and causes corrosion. (DOE-HDBK-1018 Vol.1 §1-5)
Cited:DOE-HDBK-1018 Vol.1 §1-5