Final answer:
The position not on the Kovatch-International R-11 Refueler's pumping mode selector valve is 'Open'. The actual positions are Off, Recirculate, and Transfer, with Transfer often being synonymous with Refuel.
Step-by-step explanation:
The Kovatch-International R-11 Refueler is an aircraft refueling vehicle, and its pumping mode selector valve is critical to its operation. The four positions typically found on the mode selector valve of an R-11 refueler are Off, Recirculate, Refuel, and Defuel.
Therefore, the position that is not on the R-11 Refueler's pumping mode selector valve is "Open". The other three options (Off, Recirculate, Transfer) are actual modes of operation for the pumping system, with "Transfer" typically referring to moving fuel from the R-11 to an aircraft (which can also be considered "Refuel").