17. Which of the following in not an advantage of cascade control? (2) a) The system reacts to disturbances more quickly. b) More efficient control of the primary variable. c) It is a cheap control scheme to implement. d) The effects of dead time and phase lag time are reduced in the system. 18. True or False: During start-up of a cascade control system, after the primary and secondary controllers are turned and placed in automatic mode, the primary controller gain should be increased to reduce system oscillations. (3) The controller gain (Kc) should be reduced to reduce system oscillations 19. The primary loop, or outer loop, involves the following (select all that apply)? (2) a) Control variable b) Flow control device c) A PI controller d) A P-only controller 20. True or False: The primary loop is generally a function of the secondary loop. (2)