| Hydraulically, servo-operated, automatic, change over valves, utilized in a two ram hydraulic steering gear, serve to __________. |
| A) prevent either main pump from being hydraulically motored when idle by cross pressure flow |
| B) prevent both units from operating simultaneously which could result in doubling the flow of oil and pressure leading to over pressurization of the system |
| C) allow an alternate main pump to start in the fully loaded condition thus developing immediate full torque |
| D) all of the above |
