The method
Before using the result
- Constant measured flow and correct usable-capacity data. No valve sequence, tank certification or operating instruction is provided.
Worked examples
These original training examples illustrate the method for USCG Chief Engineer Unlimited (UCEU). Use the matching “Load example” button above to explore a variation; example values are not equipment settings or prescribed criteria.
1. Worked example
Check transfer duration and entered receiving capacity in an engine-room arithmetic exercise. Leave line-up, valve sequence and operational authorisation to the applicable procedure.
- Source quantity to transfer
- 5 m³
- Destination available capacity
- 6 m³
- Volume flow
- 2 L/s
- Time = 5 / 0.002 seconds.
- Margin = 6 − 5 m³.
- Transfer time: 2,500 s
- Capacity margin: 1 m³
2. Comparison example
Compare a different supplied condition using the same method. For Marine Exam, the important check is that the input meaning, units and method assumptions still match the problem.
- Source quantity to transfer
- 3 m³
- Destination available capacity
- 6 m³
- Volume flow
- 2 L/s
- Time = 3 / 0.002 seconds.
- Margin = 6 − 3 m³.
- Transfer time: 1,500 s
- Capacity margin: 3 m³
Check your understanding
1. Which relationship is used?
Transfer time = quantity/flow; capacity margin = available capacity − quantity.
2. Which assumption should you check first?
Constant measured flow and correct usable-capacity data. No valve sequence, tank certification or operating instruction is provided.
3. How should you verify a different unit system?
Convert every input to the displayed calculation units first. Equivalent physical inputs must give equivalent results; a unit label alone does not convert a number.
Continue with the matching exam topic
This tool connects to USCG Chief Engineer Unlimited (UCEU) free practice. Work through a question independently, then use the calculation steps to identify where your method differs. The tool stays free whether or not you choose paid preparation.