120 + Interview Questions in Time Response Analysis in Control Systems Page 2 InterviewSolution

51.	A process is controlled by PID controller. The sensor has high, measurement noise. How can the effect be reduced?(a) By use of bandwidth limited derivative term(b) By use of proportional and derivative terms in the forward path(c) By use of high proportional band(d) By use of low integral gainThis question was posed to me during an interview.My query is from Design Considerations for Higher-Order Systems in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct ANSWER is (b) By use of proportional and derivative TERMS in the forward PATH For explanation: The effect of NOISE can be reduced by the use of proportional and derivative controller in the forward path.

Discussion

52.	Steady state refers to(a) Error at the steady state(b) Error at the transient state(c) Error at both state(d) PrecisionThe question was posed to me during an interview.I'd like to ask this question from Steady-state Errors and Error Constants in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct answer is (a) ERROR at the steady state Easiest explanation: Steady state ERRORS are the CHANGE in the output at the steady state with RESPECT to the change in the INPUT.

Discussion

53.	The peak percentage overshoot of the closed loop system is :(a) 5.0%(b) 10.0%(c) 16.3%(d) 1.63%This question was addressed to me during an online exam.My enquiry is from Time Response of Second Order Systems topic in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct answer is (C) 16.3% To EXPLAIN I would say: C(s)/R(s) = 1/s^2+s+1 C(s)/R(s) = w/ws^2+2Gws+w^2 Compare both the equations, w = 1 rad/sec 2Gw = 1 Mp = 16.3 %

Discussion

54.	The forward path transfer function is given by G(s) = 2/s(s+3). Obtain an expression for unit step response of the system.(a) 1+2e^-t+e^-2t(b) 1+e^-t-2e^-2t(c) 1-e^-t+2e^-2t(d) 1-2e^-t+e^+2tI got this question during an interview for a job.Asked question is from Time Response of Second Order Systems in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The CORRECT ANSWER is (d) 1-2e^-t+e^+2t Explanation: C(s)/R(s) = s/(s^2+3s+2) C(s) = 1/s-2/s+1+1/s+2 c(t) = 1-2e^-t+e^+2t.

Discussion

55.	A unit step is applied at t=0 to a first order system without time delay. The response has the value of 1.264 units at t=10 mins, and 2 units at steady state. The transfer function of the system is_____________(a) 3/(1+600s)(b) 2/(1+500s)(c) 5/(1+220s)(d) 2/(1+600s)This question was posed to me during an online exam.I would like to ask this question from Time Response of First Order Systems topic in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» RIGHT choice is (d) 2/(1+600s) The EXPLANATION: a(t)= k[1-e^^-t/T] K=2 0.632= 1-e^^-10/T T=600 sec G(s)=2/(1+600s).

Discussion

56.	According to the property of state transition method, e0 is equal to _____(a) I(b) A(c) e^-At(d) -e^AtI have been asked this question in an interview for internship.This interesting question is from State Variable Analysis in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct answer is (C) e^-At Explanation: By DEFINITION state TRANSITION matrix is defined as e^-At and this is the matrix that comes into the picture when the total response is considered that is with the free response and forced response.

Discussion

57.	The industrial controller having the best steady-state accuracy is:(a) A derivative controller(b) An integral controller(c) A rate feedback controller(d) A proportional controllerI got this question during an internship interview.The above asked question is from Performance Indices in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct option is (a) A derivative CONTROLLER The best explanation: The best STEADY state accuracy is of derivative controller and this is DUE to the fact that derivative controller is only AFFECTED by the steady state response not the transient response.

Discussion

58.	With regard to the filtering property, the lead compensator and the lag compensator are respectively :(a) Low pass and high pass filters(b) High pass and low pass filters(c) Both high pass filter(d) Both low pass filtersI had been asked this question in my homework.My question is from Design Considerations for Higher-Order Systems topic in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct choice is (B) High PASS and low pass filters For explanation I would SAY: LEAD compensator is a high pass filter and Lag compensator is a low pass filter.

Discussion

59.	Normalized response of a dynamic system refers to:(a) Characteristic feature of a response due to specific excitation irrespective of its amplitude(b) Response of dynamic system divided by its maximum value(c) Response of dynamic system divided by a standard value(d) None of the mentionedI had been asked this question during an interview.I need to ask this question from Time Response of Second Order Systems in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» CORRECT answer is (a) CHARACTERISTIC feature of a response due to specific EXCITATION irrespective of its amplitude For explanation: Normalization refers to the desired to the reference VALUE and normalized response of the dynamic system refers to the characteristic feature of a response due to specific excitation irrespective of its amplitude.

Discussion

60.	Step signal is the signal whose values is :(a) 1 for all values greater than zero(b) Indeterminate at zero(c) It is zero for time less than zero(d) All of the mentionedThis question was addressed to me in a national level competition.Origin of the question is Standard Test Signals in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct choice is (d) All of the mentioned For explanation I WOULD SAY: Step SIGNAL is the signal WHOSE value varies from zero to level in zero TIME.

Discussion

61.	The basic components of hydraulic fluid power system are :(a) Reservoir(b) Pump and lines(c) Actuating devices and control valves(d) All of the mentionedThe question was asked in quiz.This intriguing question comes from Robotic Control System topic in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» CORRECT CHOICE is (d) All of the mentioned To explain: HYDRAULIC fluid POWER system are the SYSTEMS that use the control action in which thecontrol motion is of hydraulic motion and main components are reservoir pump and lines, actuating devices and control valves.

Discussion

62.	Assertion (A): The servo robot is a closed loop systemReason (R): It allows for a feedback(a) Both A and R are true and R is not correct explanation of A(b) Both A and R are true but R is not correct explanation of A(c) A is true but R is false(d) A is false but R is trueThis question was addressed to me in class test.My question is taken from Robotic Control System topic in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct OPTION is (a) Both A and R are true and R is not correct explanation of A The explanation is: A servomechanism, sometimes shortened to servo, is an automatic device that uses error-sensing negative feedback to correct the performance of a MECHANISM and is defined by its function and the servo robot is a CLOSED loop system as it ALLOWS for a feedback.

Discussion

63.	Pneumatic controller are :(a) Flexible operation(b) High torque high speed operation(c) Fire and explosion proof operation(d) No leakageI have been asked this question in an interview for job.My doubt is from Performance Indices topic in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct ANSWER is (c) Fire and EXPLOSION proof OPERATION For explanation: PNEUMATIC CONTROLLERS are fire and explosion proof operation as they require air and gas fuel for its operation.

Discussion

64.	Steady state accuracy is determined by suitable choice of____________(a) Steady error(b) Error constants(c) Damping(d) Transient errorThis question was addressed to me by my school teacher while I was bunking the class.This key question is from Effect of Adding a Zero to a System and Design Specifications of Second-order Systems topic in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right option is (b) Error constants Explanation: STEADY state accuracy is determined by suitable choice of error constants Kv, KP and Ka depending upon the type of the SYSTEM.

Discussion

65.	A ramp input applied to a unity feedback system results in 5% steady state error. The type number and zero frequency gain of the system are respectively(a) 1 and 20(b) 0 and 20(c) 0 and 1/20(d) 1 and 1/20This question was addressed to me in a job interview.This is a very interesting question from Steady-state Errors and Error Constants topic in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct option is (a) 1 and 20 Easy explanation: Steady state error is the error calculated between the FINAL output and desired output and for the GOOD control system the error must be less and this steady state error is INVERSELY proportional to GAIN.

Discussion

66.	In a second order feedback control system natural frequency and damping(a) Can be designed by changing the gain of the individual system(b) Cannot be designed by changing the gain of the individual system(c) Are independent on the type of input excitation(d) None of the mentionedI have been asked this question in final exam.The above asked question is from Time Response of Second Order Systems in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» RIGHT CHOICE is (a) Can be designed by changing the GAIN of the individual SYSTEM Explanation: Natural FREQUENCY and damping can be designed by changing the gain of the individual system.

Discussion

67.	Let c(t) be the unit step response of a system with transfer function K(s+a)/(s+K). If c(0+) = 2 and c(∞) = 10, then the values of a and K are respectively.(a) 2 and 10(b) -2 and 10(c) 10 and 2(d) 2 and -10I got this question in an online quiz.I'd like to ask this question from Time Response of Second Order Systems topic in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right option is (c) 10 and 2 Best explanation: Applying initial VALUE theorem which state that the initial value of the system is at TIME t =0 and this is used to FIND the value of K and FINAL value theorem to find the value of a.

Discussion

68.	Laplace transform of unit impulse signal is :(a) A/s(b) A(c) 1(d) 1/sI got this question in quiz.This is a very interesting question from Time Response of First Order Systems in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct option is (C) 1 For explanation I would SAY: Laplace RESPONSE of IMPULSE signal is one which implies Laplace response is systems response.

Discussion

69.	A first order system and its response to a unit step input are shown in figure below. The system parameters are____________(a) a=5 and k=12(b) a=10 and k=5(c) a=5 and k=10(d) a=8 and k=9I had been asked this question during an interview.Question is from Time Response of First Order Systems topic in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» RIGHT choice is (c) a=5 and k=10 The best explanation: TIME constant=0.2 sec. 1/a=0.2 a=5 final value=lims→0 SC(s) =K/a K/a=2 K=10.

Discussion

70.	A system with transfer function 1/Ts+1, subjected to a step input takes to seconds to reach 50% of step height. The value of t is :(a) 6.9s(b) 10s(c) 14.4s(d) 20sI have been asked this question in a job interview.Question is taken from Time Response of First Order Systems in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct CHOICE is (c) 14.4s To ELABORATE: The RESPONSE of a first ORDER system is: A(t)=a[1-e^-t/T] ½= 1-e^-10/t T= 14.43 sec.

Discussion

71.	A control system with excessive noise, is likely to suffer from?(a) Saturation in amplifying stages(b) Loss of gain(c) Vibrations(d) OscillationsI got this question in an interview.This question is from The Approximation of Higher-Order Systems by Lower-Order topic in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right OPTION is (a) SATURATION in amplifying stages For explanation I would say: A control SYSTEM with excessive noise suffers from the saturation due to multiple inputs and outputs present and high gain of the system.

Discussion

72.	Given the matrixthe Eigen value are___________(a) 1,2,3(b) 1(c) -1,-2,-3(d) 0I have been asked this question in my homework.I want to ask this question from State Variable Analysis in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct answer is (C) -1,-2,-3 Easiest explanation: Solving the CHARACTERISTIC equation\|SI-A\| =0.

Discussion

73.	Which among the following plays a crucial role in determining the state of dynamic system?(a) State variables(b) State vector(c) State space(d) State scalarI have been asked this question in an international level competition.The doubt is from State Variable Analysis in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct choice is (a) State variables To EXPLAIN: State Variables are the integral PART of the state variable analysis and plays a crucial role in DETERMINING the state of dynamic system.

Discussion

74.	Find the velocity error constant of the system given below :(a) 0(b) 2(c) 4(d) ∞This question was addressed to me in an interview for internship.My question is based upon Steady-state Errors and Error Constants in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct CHOICE is (c) 4 For explanation I would say: Comparing with the characteristic equation the VALUES of G and w are CALCULATED as G = 1 and w = 4 and HENCE the system is critically damped.

Discussion

75.	A feedback control systems has the inherent capability that its parameter can be adjusted to alter both its transient and steady state responses.(a) True(b) FalseI got this question in an interview.This interesting question is from Standard Test Signals topic in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right choice is (a) True Explanation: Feedback’s inherent capability is that its PARAMETER can be adjusted to ALTER both transient and steady STATE RESPONSES as together they are referred to as time responses.

Discussion

76.	Consider a second order all-pole transfer function model, if the desired settling time(5%) is 0.60 sec and the desireddamping ratio 0.707, where should the poles be located in s-plane?(a) -5+j4√2(b) -5+j5(c) -4+j5√2(d) -4+j7The question was posed to me by my college professor while I was bunking the class.My doubt is from Time Response of Second Order Systems topic in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» RIGHT CHOICE is (B) -5+j5 The EXPLANATION: G = 1/√2 Gw = 5 s = -5+j5.

Discussion

77.	The transfer function of a system is G(s) = 100/(s+1) (s+100). For a unit step input to the system the approximate settling time for 2% criterion is:(a) 100 sec(b) 4 sec(c) 1 sec(d) 0.01 secI got this question during an online exam.This interesting question is from Time Response of Second Order Systems topic in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right OPTION is (b) 4 sec The explanation is: COMPARING the EQUATION with the characteristic equation and then finding the value of G and w and calculating the value of settling TIME as 4 sec from 4/Gw.

Discussion

78.	State space analysis is applicable even if the initial conditions are _____(a) Zero(b) Non-zero(c) Equal(d) Not equalThis question was addressed to me in a job interview.Asked question is from State Variable Analysis topic in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct answer is (b) Non-zero The BEST explanation: State space analysis is the analysis different from the TRANSFER FUNCTION approach as it has state variables and state VECTORS used for the analysis and can be used even if initial conditions are non-zero.

Discussion

79.	Which among the following is a unique model of a system?(a) Transfer function(b) State variable(c) Block diagram(d) Signal flow graphsI got this question during an online interview.I'd like to ask this question from State Variable Analysis in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The CORRECT option is (a) Transfer function To EXPLAIN I would say: Transfer Function is DEFINED as the RATIO of the Laplace OUTPUT to the Laplace input with the zero initial conditions and is a unique model of the system.

Discussion

80.	The band width, in a feedback amplifier.(a) Remains unaffected(b) Decreases by the same amount as the gain increase(c) Increases by the same amount as the gain decrease(d) Decreases by the same amount as the gain decreaseThe question was posed to me by my school principal while I was bunking the class.My doubt stems from The Approximation of Higher-Order Systems by Lower-Order in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» CORRECT choice is (C) Increases by the same amount as the gain decrease For EXPLANATION: The bandwidth of closed loop SYSTEM increases hence increasing the noise due to increased bandwidth.

Discussion

81.	Assertion (A): Degree of freedom is defined as the number of variables to define motion in the body in space.Reason (R): Maximum degree of freedom can be six in a robot.(a) Both A and R are true and R is not correct explanation of A.(b) Both A and R are true but R is not correct explanation of A.(c) A is true but R is false(d) A is false but R is trueThis question was posed to me in an interview.My enquiry is from Robotic Control System in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct answer is (B) Both A and R are true but R is not correct EXPLANATION of A. Best explanation: Degree of freedom defines the VARIABLES responsible for the MOTION of the robot and ALLOWS robot to reach all positions and orientations.

Discussion

82.	Assertion (A): The control system of an industrial robot determine its flexibility and efficiency, within the limits set beforehand by the design of the mechanical structure.Reason (R): The control system provides a logical sequence for the robot to follow.(a) Both A and R are true and R is not correct explanation of A.(b) Both A and R are true but R is not correct explanation of A.(c) A is true but R is false(d) A is false but R is trueThis question was addressed to me in final exam.This question is from Robotic Control System in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The CORRECT option is (a) Both A and R are true and R is not correct explanation of A. To EXPLAIN I would say: The system provides the theoretical position VALUES for each step and continuously measures the actual position during movement.

Discussion

83.	Hydraulic controller :(a) Flexible operation(b) High torque high speed operation(c) Fire and explosion proof operation(d) No leakageI had been asked this question in an internship interview.My question is from Performance Indices in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct choice is (b) HIGH TORQUE high speed OPERATION Explanation: Hydraulic CONTROLLER must have no leakage and ALSO it requires high torque and high speed operation due to high density of the controller.

Discussion

84.	Assertion (A): A derivative controller produces a control action for constant error only.Reason (R): The PD controller increases the damping and reduces the peak overshoot.(a) Both assertion and reason are true and R is correct explanation of A(b) Both A and R true but R is not correct explanation of A(c) A is true but R is false(d) A is False but R is trueThis question was addressed to me by my college director while I was bunking the class.Question is from Effect of Adding a Zero to a System topic in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» CORRECT option is (d) A is False but R is true To elaborate: The integral CONTROL action produces a control action for error constant not derivative controller. A derivative controller improves the transient state of the control SYSTEM apart from increasing the bandwidth, OVERSHOOT and RISE time.

Discussion

85.	The output in response to a unit step input for a particular continuous control system is c(t)= 1-e^-t. What is the delay time Td?(a) 0.36(b) 0.18(c) 0.693(d) 0.289The question was asked during an interview for a job.Question is from Time Response of Second Order Systems in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» CORRECT answer is (C) 0.693 Easiest explanation: The output is given as a function of time. The FINAL value of the output is LIMN->∞c(t)=1; . Hence Td (at 50% of the final value) is the solution of 0.5=1-e^-Td, and is equal to ln 2 or 0.693 sec.

Discussion

86.	First order system is defined as :(a) Number of poles at origin(b) Order of the differential equation(c) Total number of poles of equation(d) Total number of poles and order of equationThe question was posed to me during an internship interview.The origin of the question is Time Response of First Order Systems in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct option is (d) Total NUMBER of poles and order of equation Easy explanation: FIRST order SYSTEM is defined by total number of poles and also which is same as the order of differential equation.

Discussion

87.	Which of the following transfer function will have the greatest maximum overshoot?(a) 9/(s^2+2s+9)(b) 16/(s^2+2s+16)(c) 25/(s^2+2s+25)(d) 36/(s^2+2s+36)I had been asked this question in an international level competition.The question is from Time Response of Second Order Systems topic in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The CORRECT ANSWER is (d) 36/(s^2+2s+36) The explanation is: COMPARING the characteristic EQUATION with the standard equation the value of the damping factor is calculated and the value for the option d is minimum hence the system will have the MAXIMUM overshoot .

Discussion

88.	It is generally used to analyze the transient response to one of the standard test signals.(a) True(b) FalseI got this question by my college director while I was bunking the class.My query is from Standard Test Signals in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer»

Discussion

89.	A transfer function of control system does not have pole-zero cancellation. Which one of the following statements is true?(a) System is neither controllable nor observable(b) System is completely controllable and observable(c) System is observable but uncontrollable(d) System is controllable but unobservableThis question was addressed to me in a national level competition.Question is from State Variable Analysis topic in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The CORRECT CHOICE is (b) System is completely CONTROLLABLE and observable The best I can EXPLAIN: If the input-output transfer function of a linear time-invariant system has pole-zero cancellation, the system will be NEITHER controllable nor observable.

Discussion

90.	State variable analysis has several advantages overall transfer function as:(a) It is applicable for linear and non-linear and variant and time-invariant system(b) Analysis of MIMO system(c) It takes initial conditions of the system into account(d) All of the mentionedThis question was addressed to me in unit test.Question is from State Variable Analysis in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct option is (d) All of the mentioned Explanation: State variable ANALYSIS has several ADVANTAGES OVERALL transfer FUNCTION as it is applicable for linear and non-linear and variant and time-invariant system, analysis of MIMO system, it takes initial conditions of the system into account.

Discussion

91.	State model representation is possible using _________(a) Physical variables(b) Phase variables(c) Canonical state variables(d) All of the mentionedThe question was asked during an online exam.The doubt is from State Variable Analysis in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right answer is (d) All of the mentioned The best I can explain: State MODEL REPRESENTATION is the representation of the control SYSTEM is the form of the state variables and state vectorsand is possible using physical variables, phase variables and CANONICAL state variables.

Discussion

92.	Non servo robots are also called as:(a) Pick and place(b) Fixed stop robot(c) Both of the mentioned(d) None of the mentionedI got this question during a job interview.This interesting question is from Robotic Control System topic in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right OPTION is (C) Both of the mentioned Explanation: Non servo robots are simplest robots as they are the LEAST complex structures and they are made to do some specific and less jobs and it is an open loop SYSTEM.

Discussion

93.	Connectors and fittings are used in the fluid power system :(a) To connect to various sections of the fluid lines to each other(b) To detach the fluid lines to the components of the system(c) They are used in the high pressure fluid system(d) None of the mentionedI have been asked this question in a national level competition.Enquiry is from Robotic Control System in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The correct OPTION is (a) To connect to various sections of the fluid LINES to each other For explanation I would say: Connectors and FITTINGS are USED in the fluid POWER system to connect to various sections of the fluid lines to each other and to attach the fluid lines to the components of the system.

Discussion

94.	Pumps that discharge liquid in a continuous flow are referred to as non-positive displacement.(a) True(b) FalseThe question was posed to me at a job interview.My question comes from Robotic Control System in section Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right CHOICE is (a) True Best EXPLANATION: Pumps can be classified as non-positive and positive displacement and that DISCHARGE liquid in a continuous FLOW are referred to as non-positive displacement.

Discussion

95.	The loop transfer function of controller Gc(s) is :(a) 1+0.1s/s(b) -1+0.1s/s(c) –s/s+1(d) s/s+1I have been asked this question in an interview.This is a very interesting question from Time Response of Second Order Systems in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» CORRECT answer is (a) 1+0.1s/s The explanation: The transfer FUNCTION of the CONTROLLER is 0.1s+1/s Gc(s) = 0.1s+1/s.

Discussion

96.	Motors used for electronic actuator drives :(a) AC servo motors(b) DC servo motors(c) Stepper motors(d) All of the mentionedThis question was posed to me during an interview for a job.My question is based upon Robotic Control System topic in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct option is (d) All of the mentioned To explain: Motors are the devices that CONVERT the mechnical energy into ELECTRICAL energy and can be used in MANY applications and used for ELECTRONIC actuator drives are AC, DC, and stepper motors.

Discussion

97.	What is the effect of phase-lag compensation on the performance of the servo system?(a) For a given relative stability, the velocity constant is increased(b) For a given relative stability, the velocity constant is decreased(c) The bandwidth of the system is increased(d) The time response is made fasterThe question was posed to me during an interview.Question is taken from Design Considerations for Higher-Order Systems in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct OPTION is (a) For a GIVEN relative stability, the velocity CONSTANT is increased Easiest explanation: Phase lag compensation is an INTEGRATOR. It reduces the steady state ERROR. Velocity constant = 1/ (steady state error). So, the velocity constant is increased.

Discussion

98.	Assertion (A): It is observed that step function is first derivative of a ramp function and impulse function is first derivative of a step function.Reason (R): From the derived time response expression it is concluded that the output time response also follows the same sequence as that of input functions.(a) Both A and R are true and R is the correct explanation of A(b) Both A and R are true but R is not correct explanation of A(c) Both A is True but R is false(d) Both A is False but R is trueThe question was asked by my college director while I was bunking the class.I'd like to ask this question from Time Response of First Order Systems in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Correct OPTION is (B) Both A and R are TRUE but R is not correct EXPLANATION of A The best explanation: If response due to one standard signal is known then response due to other signals can also be derived.

Discussion

99.	Transient response analysis is done for_________ systems.(a) Unstable(b) Stable(c) Conditionally stable(d) Marginally stableI got this question in class test.My doubt is from Standard Test Signals topic in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The CORRECT answer is (B) Stable To explain I would SAY: In case the system happens to be unstable, we NEED not proceed with its transient response ANALYSIS.

Discussion

100.	An automatic apparatus or device that performs functions ordinarily ascribed to humans or operate with what appears to be almost human intelligence is called ________(a) Robot(b) Human(c) Animals(d) ReptilesI have been asked this question in an online interview.Enquiry is from Robotic Control System in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right option is (a) ROBOT Easiest explanation: Robot is an automatic apparatus or device that PERFORMS functions ORDINARILY ascribed to HUMANS or operate with what appears to be almost human intelligence.

Discussion

Explore topic-wise InterviewSolutions in .

Laplace transform of unit impulse signal is :(a) A/s(b) A(c) 1(d) 1/sI got this question in quiz.This is a very interesting question from Time Response of First Order Systems in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems

Given the matrixthe Eigen value are___________(a) 1,2,3(b) 1(c) -1,-2,-3(d) 0I have been asked this question in my homework.I want to ask this question from State Variable Analysis in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems