Q.1
The open loop transfer function of the feedback control system is given by G(s) = K(s+3)/s(s+4)2(s+5)(s+6). The number of asymptotes and the centroid of asymptotes of the root loci of closed loop system is?
  • a) -4 and (-4,0)
  • b) 4 and (-4,0)
  • c) -3 and (-12,0)
  • d) 3 and (-12,0)
Q.2
With negative feedback in a closed loop control system, the system sensitivity to parameter variation:
  • a) Becomes infinite
  • b) Becomes zero
  • c) Decreases
  • d) Increases
Q.3
What is Control System?
  • a) Control system is a system in which the output is controlled by varying the input
  • b) Control system is a device that will not manage or regulate the behaviour of other devices using control loops
  • c) Control system is a feedback system that can be both positive and negative
  • d) Control System is a system in which the input is controlled by varying the output
Q.4
Which of the following is not the feature of a modern control system?
  • a) Correct power level
  • b) No oscillation
  • c) Quick response
  • d) Accuracy
Q.5
What is the characteristic of a good control system?
  • a) Insensitive to the parameter variation but sensitive to the input commands
  • b) Neither sensitive to parameter variations nor sensitive to input commands
  • c) Insensitive to the input command
  • d) Sensitive to parameter variation
Q.6
Which of the following element is not used in an automatic control system?
  • a) Final control element
  • b) Sensor
  • c) Oscillator
  • d) Error detector
Q.7
A control system working under unknown random actions is called ____________
  • a) Adaptive control system
  • b) Stochastic control system
  • c) Computer control system
  • d) Digital data system
Q.8
Which of the following is an open loop control system?
  • a) Ward Leonard control
  • b) Metadyne
  • c) Stroboscope
  • d) Field controlled D.C. motor
Q.9
Which of the following statements is correct for any closed loop system?
  • a) Only one of the static error co-efficient has a finite non-zero value
  • b) All the co-efficient can have zero value
  • c) All the co-efficient are always non-zero
  • d) All of the mentioned
Q.10
What should be the nature of bandwidth for a good control system?
  • a) Small
  • b) Medium
  • c) Large
  • d) All of the mentioned
Q.11
The output of the feedback control system must be a function of ____________
  • a) Output and feedback signal
  • b) Input and feedback signal
  • c) Reference input
  • d) Reference output
Q.12
Which of the following statement is true about Feedback control system?
  • a) Equally sensitive to forward feedback path parameter changes
  • b) Insensitive to both forward and feedback path parameter changes
  • c) Less sensitive to feedback path parameter changes than to forward path parameter changes
  • d) Less sensitive to forward path parameter changes than to feedback path parameter changes
Q.13
In a stable control system backlash can cause which of the following?
  • a) Overdamping
  • b) Low-level oscillations
  • c) Underdamping
  • d) Poor stability at reduced values of open loop gain
Q.14
In a control system the output of the controller is given to
  • a) Amplifier
  • b) Sensor
  • c) Final control element
  • d) Comparator
Q.15
A Control System with excessive noise, is likely to suffer from which of the following?
  • a) Oscillations
  • b) Saturation in amplifying stages
  • c) Loss of gain
  • d) Vibrations
Q.16
In a temperature control system, what conversion in signal takes place?
  • a) Error to Digital
  • b) Error to Analog
  • c) Digital to Analog
  • d) Analog to Digital
Q.17
Which of the following control systems have unpredictable & non-repeatable?
  • a) Stochastic control systems
  • b) Deterministic control systems
  • c) Static control systems
  • d) Dynamic control systems
Q.18
In pneumatic control systems the control valve used as the final control element converts
  • a) Position change to pressure signal
  • b) Electric signal to pressure signal
  • c) Pressure signal to electric signal
  • d) Pressure signal to position change
Q.19
Consider the following statements with respect to the feedback of the control systems.
  • a) i, ii, iii and iv only
  • b) i, ii and iii only
  • c) i, iii and iv only
  • d) i, ii and iv only
Q.20
In closed loop control system, what is the sensitivity of the gain of the overall system, M to the variation in G?
  • a) G/1GH
  • b) 1/1+GH
  • c) G/1+G
  • d) 1/1+G
0 h : 0 m : 1 s