| If the wearing rings of device '7' shown in the illustration become worn, how will the evaporation rate in '23' be affected? Illustration MO-0111 |
| A) The rate of evaporation will decrease. |
| B) The rate of evaporation is dependent on the level of vacuum maintained within the unit, and not the flow of water to the unit. |
| C) Device '7' does not use wearing rings, as these are normally positive displacement pumps. |
| D) The rate of evaporation will not be affected as the standby pump; labeled '8' will be used instead. |
