(2025 Exam) NSTM Chapter 081 Flashcards
1
Q
- Estimated fuel savings due to proper hull cleaning and propeller polishing?
A
15%
2
Q
At what point in fouling does sonar performance rapidly deteriorate?
A
After progressing beyond FR-30
3
Q
What fouling rate is common on drydock block areas?
A
FR-70 and above
4
Q
What are your safe distances from pier and keel?
A
20 carrier) feet from the pier and 6 feet from the bottom, mean low tide
5
Q
What is the max PSI for water jets used on bare propulsor surfaces/painted?
A
10,000 PSI/2,000 PSI
6
Q
How far from the leading edge of propulsor blades can you not use aggressive or power tools?
A
3 inches
7
Q
What is a common abrasive disc type used on sonar domes?
A
D3
