Process Control and Instrumentation Which of the following controllers has maximum offset? P-controller P-D controller P-I controller P-I-D controller P-controller P-D controller P-I controller P-I-D controller ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Suppose that the gain, time constant and dead time of a process with the following transfer function:Gc(s) = 10 exp( - 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as 8, 0.6, 0.12 12, 0.6, 0.12 12, 0.4, 0.08 8, 0.6, 0.08 8, 0.6, 0.12 12, 0.6, 0.12 12, 0.4, 0.08 8, 0.6, 0.08 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation In a closed loop system, the process to be controlled is an integrating process with transfer function l/2s. The controller proposed to be used in an integral controller with transfer function 1/T₁s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit Unstable response Underdamped response Overdamped response Undamped response Unstable response Underdamped response Overdamped response Undamped response ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The time constant of a first order process with resistance R and capacitance C is RC 1/RC R - C R + C RC 1/RC R - C R + C ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion. None of these Routh stability Nyquist Bode stability None of these Routh stability Nyquist Bode stability ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following judges the accuracy of an instrument? Drift Static error Dead zone None of these Drift Static error Dead zone None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS