A. 0.5/0.2
B. 0.2/0.5
C. 0.2 × 0.5
D. 1/√(0.2 × 0.5)
Related Mcqs:
- In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. 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__________________?
A. Overdamped response
B. Underdamped response
C. Undamped response
D. Unstable response - The transfer function for a PID controller is (where, η i is the integral (reset) time and ηD is the derivative time.) ?
A. Kc(1 + ηis + ηD ). s
B. Kc[1 + (1/ηis) + ηD . s)
C. Kc(1 + ηis + (1/ηD . s)
D. None of these - The frequency response of a dynamic element shows a constant magnitude ratio at all frequencies. The element exhibits a negative phase shift at all frequencies. The absolute value of the phase shift increases linearly with frequency. The element has the transfer function ?
A. e-ηS
B. (T1S + 1)/(T2S + 1)
C. (T1S/(T2S + 1)
D. (T1S + 1)/(T2S - 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) ?
A. w = 1/√14, Kc = 45/7 √14
B. w = √(7/6), Kc = 46/3
C. w = 1, Kc = 13
D. w = √(7/8), Kc = 45/4 - The transfer function for an ideal proportional plus reset controller (reset time T) is_______________?
A. Kc[1 + (1/TS)]
B. Kc(1 + TS)
C. Kc/(1 + TS)
D. Kc/[1 + (s/T)] - The transfer function for a P-D controller is________________?
A. Kc(1+ηD s)
B. Kc(1 +1/ηD s)
C. Kc ηD s
D. Kc/ηD s - 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________________?
A. 8, 0.6, 0.08
B. 12, 0.6, 0.12
C. 8, 0.6, 0.12
D. 12, 0.4, 0.08 - The experimental response of the controlled variable y(t) for a step change of magnitude ‘P’ in the manipulated variable x(t) is shown below: The appropriate transfer function of the process is_________________?
A. (Q/P) e-(Q/R)S/(TdS + 1)
B. (Q/R) e-TdS/(Q/P) (S + 1)
C. (Q/P) e-TdS/(Q/R) (S + 1)
D. (Q/R) e-(P/Q)S/(TdS + 1) - According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is_________________?
A. 0°
B. 45°
C. 90°
D. 180° - The frequency at which maximum amplitude ratio is attained is called the ______________ frequency?
A. Corner
B. Resonant
C. Cross-over
D. Natural
