Process Control and Instrumentation Nichol's chart deals with R. vs. phase lag of first order Frequency response values of controllers Closed loop values vs. open loop values R. vs. phase lag of second order R. vs. phase lag of first order Frequency response values of controllers Closed loop values vs. open loop values R. vs. phase lag of second order ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system? < 1 >1 1 None of these < 1 >1 1 None of these ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the __________ variable. Load Controlled None of these Manipulated Load Controlled None of these Manipulated 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. Bode stability None of these Routh stability Nyquist Bode stability None of these Routh stability Nyquist ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Gain margin is equal to the Reciprocal of amplitude ratio Amplitude ratio Gain in P-I controller Gain in P controller Reciprocal of amplitude ratio Amplitude ratio Gain in P-I controller Gain in P controller ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1). W = 1, Kc = 13 W = √(7/6), Kc = 46/3 W = 1/√14, Kc = 45/7√14 W = √(7/8), Kc = 45/4 W = 1, Kc = 13 W = √(7/6), Kc = 46/3 W = 1/√14, Kc = 45/7√14 W = √(7/8), Kc = 45/4 ANSWER DOWNLOAD EXAMIANS APP
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