| Refer to the diagram of the AC turboelectric drive system as shown in the illustration. The propulsion motor operates from maneuvering speed to full ahead speed in the ahead direction. The propulsion motor will not operate at any speed in the astern direction. What is most likely the problem? Illustration EL-0142 |
| A) The reversing contactor (R) fails to pull in. |
| B) The AC propulsion motor field winding fails to reverse in polarity. |
| C) The AC propulsion motor has an open astern winding. |
| D) The turbine of the turbo-alternator fails to rotate in the astern direction. |
