A. Modify the input signal
B. Amplify the input signal
C. Convert the primary signal into a more useful quantity, usually an electric impulse
D. Codify/decodify the input signal
Related Mcqs:
- For an input forcing function, X(t) = 2t2, the Laplace transform of this function is________________?
A. 2/s2
B. 4/s2
C. 2/s3
D. 4/s3 - 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 inverse Laplace transform of the function f(S) = 1/S (1 + S) is_________________?
A. 1 + et
B. 1 – et
C. 1 + e-t
D. 1 – e-t - The transfer function of a second order system is _____________________?
A. 1/(T2s2 + 2ξTs + 1)
B. 1/(T2s2 + 2Ts + 1)
C. 1/(T2s2 + 2ξT + 1)
D. None of these - ____________ stability method uses open loop transfer function?
A. Nyquist
B. Mikhailov
C. Ruth
D. None of these - 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 - Transfer function of transportation lag is___________________?
A. eTS
B. e-TS
C. 1/(Ts + 1)
D. None of these - In a single tank system, the transfer function of level to inlet flow rate is__________________?
A. R/TS
B. R/(TS + 1)
C. 1/TS
D. None of these - For two non-interacting first order systems connected in series, the overall transfer function is the ______________ of the individual transfer functions?
A. Product
B. Ratio
C. Sum
D. Difference - The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K (s + 1)/[2 (2s + 1) (3s + 1)] will have a definite number of loci for variation of K from 0 to ∞. The number of loci is_______________?
A. 1
B. 2
C. 3
D. 4
