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.Management Sciences
Category: Process Control and Instrumentation
Mercury manometer (U-tube type) exemplifies a ______________ order system?
A. Zero
B. First
C. Second
D. Third
Identify an unbounded input from inputs whose transfer functions are given below______________?
A. 1
B. 1/S
C. 1/S2
D. 1/(S2 + 1)
The Laplace transform of exp(at), where a > 0, is defined only for the Laplace parameter, s > a since______________?
A. The function is exponential
B. The Laplace transform of integral of exp(at) has finite values only for s > a
C. The Laplace transform integral of exp(at) has initial values only for s > a
D. The function exp(at) is piece-wise continuous only for s > a
The open loop transfer function of a control system is KR/(1 + TS). This represents ______________?
A. A first order system
B. Dead time system
C. A first order time lag
D. A second order system
Optical activity of a solution can be determined using a ___________________?
A. Polarimeter
B. Polarograph
C. Dilatometer
D. Refractometer
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)]
Which of the following is not a differential pressure flow meter ?
A. Rotameter
B. Flow nozzle
C. Orificemeter
D. Venturimeter
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)
Which of the following is the dynamic characteristics of an instrument ?
A. Reproducibility
B. Sensitivity
C. Dead zone
D. Fidelity
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