| If the peak to peak pressure pulsation in the diesel engine fuel injection return piping exceeds 285 psi what special provision is to be provided? |
| A) The piping shall be shielded and secured to prevent fuel or fuel mist from reaching a source of ignition on the engine or its surroundings. |
| B) The piping shall be directed to the fuel oil day tank, in addition it shall enter below the normal operating level of the tank. |
| C) Most diesel injection systems do not develop high pressures in their return lines due to regulations prohibiting installation of valves in these lines. |
| D) Return piping is required to be protected by relief valves which relieve to the diesel oil settling tank. |
