| Which of the following statements describes the primary reason for the device shown in the illustration to be incorporated into the air start system? Illustration MO-0116 |
| A) This unit controls the air operated turning motor exhaust when the unit is in operation. |
| B) The three position valve prevents the fuel flow reaching the fuel injection pumps. |
| C) The unit shown is used to prevent starting of the main engine when the turning gear is engaged. |
| D) The shuttle valve compensates for any decrease in the operator's physical abilities. |
