b. Construct the control block diagram of the given process in Figure 1 with clearly labelling all signals and blocks. The detail descriptions of control elements were tabulated in Table 1. Table 1 Details of control elements Control elements Design Conditions Process Second order system with gain 5 kg/hr/C, time constant of 15 sec and damping ratio of 2.5 Controller Temperature controller of proportional-integral (PI) with gain 35 %C0/%TO and integral time is 10 sec Transmitter Temperature sensor is calibrated from 120 to 200C Control Valve First order plus dead time system with gain 3 kg/hr/%CO, time constant of 4 sec and time delay of 1.8 sec Disturbance First order system with 6.2 kg/hr/C and time constant of 5.2 sec (7 marks)