Across
- 3. treatment that removes suspended solids from water
- 7. Chemicals that are added to water to speed up the actions of other chemicals
- 12. uses resin beads to replace many different kinds of ions with other ions that combine to form water
- 13. type of element in an automatic control system that produces a corrective signal that is sent to the last element in the system
- 14. type of gas that is a respiratory irritant which can destroy lung tissue if it is inhaled
- 15. Type of control that can minimize the effects of capacitance and resistance in a process
- 16. A resin bead has thousands of charged areas
- 17. can remove dissolved oxygen from water
- 18. type of control used in combination with rate control
- 19. refers to the amount of change that can occur in a process without causing a control system response
- 20. used to aid in settling suspended solids
Down
- 1. Water containing a large volume of dissolved gases
- 2. any condition that can cause a process variable to change away from set point
- 4. replaces hard ions, which produce scale, with soft ions, which do not produce scale
- 5. is caused by the cumulative effects of capacitance, resistance, and dead time
- 6. can block passages and reduce heat transfer in pipes and equipment
- 8. a control method in which the value of a process disturbance is measured, and action is taken to prevent the disturbance from changing the value of a controlled process variable
- 9. used to trap large, suspended solids
- 10. The desired value of a controlled variable
- 11. Water containing a large number of dissolved solids