Which ONE of the following options CORRECTLY matches the efficiencies in
Column 1 with the corresponding definitions in
Column 2?
| Column 1 | | Column 2 | |
|---|
| I | Gear efficiency | P | Ratio of delivered power to shaft power |
| II | Shaft efficiency | Q | Ratio of shaft power to brake power |
| III | Hull efficiency | R | Ratio of thrust power to delivered power |
| IV | Propeller (behind-hull) efficiency | S | Ratio of effective power to thrust power |