Control Systems Question & AnswersJune 5, 2021 By WatElectronics This article lists 100+ Control Systems MCQs for engineering students. All the Control Systems Questions & Answers given below includes solution and link wherever possible to the relevant topic.The connection of components together to perform a specific operation in which the output is controlled by input is known as a control system. The control systems are of two types open loop and close loop control systems. In an open-loop system, we just give input to a system and it provides the output according to the characteristics of the system. The open-loop systems are simple, economical, stable, and the changes in the output are not corrected automatically in an open-loop control system. The closed-loop control system is nothing but an open-loop system with a feedback element. The close loop systems are more accurate and less affected by noise.The stepper motors are used in computer peripheral systems, paper drive mechanisms, and automatic control systems. The air conditioners, refrigerators, power systems are examples of control systems. The Voltage stabilizers, Automatic electronic iron, Water tanks with float balls are examples of the closed-loop control system. The control systems are used in electrical systems to control both voltage and current in the electrical system. The aircraft, Automobiles, Helicopters, etc are examples of the system. When a control system is exited with a standard input signal then the steady-state error may be zero or one or infinite. 1). How many types of control systems are there? One Two Three Four Hint There are two types of control systems are there they are open loop and close loop control systems2). The advantages of an open-loop systems are __________ Simple, Economical Easier to construct Stable All of the above HintThe open-loop control systems are very easy to construct, simple, economical, and stable3). What are the disadvantages of a closed-loop control system? Complex, costlier Stability is the main problem Feedback reduces the overall gain of the system All of the above HintCompare to the open-loop system, the closed-loop systems are more complex, costlier to integrate, and feedback reduces the overall gain of the system and the major problem is stability4). Whenever the control system obeys the linearity and homogeneity then the system is ____________ Time invariant system Linear system Linear time-variant system Linear time-invariant system HintWhenever the control system obeys the linearity and homogeneity then the system is linear5). What are the advantages of a closed-loop control system? Accurate Less effected by noise More effected by noise Both a and b HintThe close loop control systems are accurate and less affected by noise6). Whenever the control system doesn’t obey the linearity and homogeneity then the system is ____________ Time-invariant system Linear system Non-linear system Linear time-invariant system Hint Whenever the control system doesn’t obey the linearity and homogeneity then the system is non-linear 7). If output is varying with time then the system is ____________ Time invariant system Linear system Non-linear system Time variant system HintIf the output is varying with time then the system is time-variant8). What are the disadvantages of an open-loop control system? Inaccurate Accurate Easy to construct None of the above HintOpen-loop systems are inaccurate9). If output is not varying with time then the system is ____________ Time invariant system Linear system Non-linear system Time variant system HintIf the output is not varying with time then the system is time-invariant10). If the control system is both linear and time-variant then the type of system is ____________ Time-invariant system Linear system Linear time-variant system Linear time-invariant system Hint If the control system is both linear and time-variant then the type of system is a linear time-variant system11). If the control system is both linear and time-invariant then the type of system is ____________ Time-invariant system Linear system Linear time-variant system Linear time-invariant system HintIf the control system is both linear and time-invariant then the type of system is a linear time-invariant system12). How many types of feedbacks are there? One Two Three Four HintThere are two types of feedbacks are there they are positive and negative feedback13). The transfer function of negative feedback is expressed as ________ T= G/1+GH T= G/1-GH T= G/1*GH T= G/GH-1 HintThe transfer function of negative feedback is expressed as T= G/1+GH14). The transfer function of positive feedback is expressed as ________ T= G/1+GH T= G/1-GH T= G/1*GH T= G/GH-1 HintThe transfer function of positive feedback is expressed as T= G/1-GH15). The transfer function is defined as a ratio of ______________ Laplace transform of output to Laplace transform of the input Laplace transform of output + Laplace transform of the input Laplace transform of output - Laplace transform of the input None of the above HintThe transfer function is defined as a ratio of Laplace transform of output to Laplace transform of the input16). The sensitivity is defined as a ___________ Percentage change in transfer function to the percentage change in gain Percentage change in gain to the percentage change in a transfer function Percentage change in transfer function*the percentage change in gain None of the above HintThe sensitivity is defined as a ratio of percentage change in transfer function to the percentage change in gain17). How many types of mechanical systems are there based on the type of motion? One Two Three Four HintThere are two types of mechanical systems are there based on the type of motion they are translational and rotational mechanical system18). What are the basic elements in the translational mechanical system? Mass, spring Mass, dashpot Dashpot, spring Mass, spring, and dashpot HintThe mass, spring, and dashpot are the basic elements in the translational mechanical system19). _________ mechanical systems move along a line Translational Rotational Both a and b None of the above HintThe translational mechanical systems move along a line20). What are the basic elements in the rotational mechanical system? Translational spring Moment of the interior of mass Dashpot All of the above HintThe translational spring, dashpot, moment of the interior of the mass are the basic elements in a rotational mechanical systemControl System MCQs for Engineers21). How many analyses do we have to convert any mechanical translational system into an electrical system? One Two Three Four HintThere are two analysis to convert any mechanical translational system into an electrical system they are force voltage and force current analysis22). In force voltage analogy the mechanical system input is always considered as _______ Force Velocity Voltage None of the above HintIn force voltage analogy the mechanical system input is always considered as force23). In force voltage analogy the mechanical system output is in terms of _______ Force Velocity Voltage None of the above HintIn force voltage analogy the mechanical system output is in terms of velocity24). _________ mechanical systems will move along an axis Translational Rotational Both a and b None of the above HintThe rotational mechanical systems will move along an axis25). For electrical system in force voltage analogy the input is always considered as _____________ Force Velocity Voltage source None of the above HintFor an electrical system in force voltage analogy the input is always considered as a voltage source26). In force voltage analogy the electrical system output is in terms of ______ Force b) c) d) Velocity Voltage source Current through the element HintIn force voltage analogy the electrical system output is in terms of current through the element27). In force current analogy the electrical system output is in terms of ______ Force Velocity Voltage through the element Current through the element HintIn force current analogy the electrical system output is in terms of voltage through the element28). In torque voltage analogy the mechanical rotational system input is always considered as ____________ Force Velocity Angular velocity Torque HintIn torque voltage analogy the mechanical rotational system input is always considered as torque29). Torque equation for mass is expressed as _________ T=J dω/dt T=Bω T=K ∫ωdt None of the above HintThe torque equation for mass is expressed as T=J dω/dt30). ___________ is a point representing a variable or signal Node Transmittance Branch None of the above HintNode is a point representing a variable or signal31). In force current analogy the electrical system input is always considered as __________ Current source Velocity Voltage None of the above Hint In force current analogy the electrical system input is always considered as current32). ______ is a node that contains only outgoing branches Input node Output node Mixed node None of the above HintThe input node is a node that contains only outgoing branches33). How many types of time-domain analyses are there? One Two Three Four HintThere are two types of time-domain analysis are there they are transient response and steady-state response34). The response of the system which varies with time is known as ________ Transient response Steady-state response Both a and b None of the above HintThe response of the system which varies with time is known as transient response35). In torque voltage analogy the mechanical rotational system output is in terms of ____________ Force Velocity Angular velocity Torque Hint In torque voltage analogy the mechanical rotational system output is in terms of angular velocity36). Torque equation for dashpot is expressed as ________ T=J dω/dt T=Bω T=K ∫ωdt None of the above HintThe torque equation for dashpot is expressed as T=Bω37). _____ is a node that has both outgoing and incoming branches Input node Output node Mixed node None of the above HintThe mixed node is a node that has both outgoing and incoming branches38). In torque voltage analogy the electrical system is always considered as _________ Voltage Velocity Angular velocity Torque HintIn torque voltage analogy the electrical system is always considered as voltage39). Torque equation for spring is expressed as ________ T=J dω/dt T=Bω T=K ∫ωdt None of the above HintThe torque equation for spring is expressed as T=K ∫ωdt40). ________ is a node that contains only incoming branches Input node Output node Mixed node None of the above HintThe output node is a node that contains only incoming branchesControl System MCQs for Quiz41). In torque voltage analogy the electrical system output is in terms of ____________ Force Velocity Angular velocity Current through the element HintIn torque voltage analogy the electrical system output is in terms of current through the element42). The response of a system that won’t change with time is known as__________ Transient response Steady-state response Both a and b None of the above Hint The response of a system that won’t change with time is known as steady-state response43). What are the characteristics of the test signal? Sudden shock Sudden change Constant velocity and acceleration All of the above HintThe sudden shock, sudden change, constant velocity, and acceleration are the characteristics of the test signal44). _____________are the time domain specifications Delay time, rise time Peak time Settling time All of the above HintThe delay time, rise time, peak time, and settling time are the time domain specifications45). The time taken for the response to reach 50% of its final value from the very first time is known as _________ Delay time Peak time Settling time All of the above HintThe time taken for the response to reach 50% of its final value from the very first time is known as delay time46). The time taken for the response to reach 0-100% of its final value from the very first time is known as _________ Rise time Peak time Settling time All of the above HintThe time taken for the response to reach 0-100% of its final value from the very first time is known as rise time47). How many types of static error constants are there? One Two Three Four HintThere are three types of static error constants are there they are positional, velocity, acceleration error constants48). The lag-lead compensator produces __________ Phase lag Phase led Both a and b None of the above HintThe lag-lead compensator produces both phase lag and phase lead49). What are the effects of lag compensator? Stability increases Rise time increases Bandwidth decreases All of the above HintThe effects of lag compensator are stability and rise time increases and bandwidth decreases50). Compensators are used to __________ Obtain the desired performance of the system Used to stabilize the unstable system Both a and b None of the above Hint Compensators are used to obtain the desired performance of the system and to stabilize the unstable system51). The time taken for the response to reach the peak value is called as ________ Rise time Peak time Settling time All of the above HintThe time taken for the response to reach the peak value is called peak time52). What are the effects of lead compensator? Stability increases Rise time decreases Bandwidth increases All of the above HintThe effects of lead compensator are stability and bandwidth increases, and rise time decreases53). How many types of compensators are there based on connections? One Two Three Four Hint There are three types of compensators are there based on connections they are cascade, feedback, and cascade with feedback compensator54). How many system analysis methods are there? One Two Three Four HintThe system analysis methods are two types they are state space and transfer function based method55). _________ is a method which works based on transfer function Polar plot Nyquist rate Root Locus All of the above HintThe polar plot, Nyquist rate, root locus are the methods works based on the transfer function56). The transfer-based method is applicable to ____________ system Time variant Non-linear LTI None of the above HintThe transfer-based method is applicable to the LTI system57). The state-space method is applicable to _________ Time variant Non-linear Both a and b None of the above HintThe state-space method is applicable to both time-variant and non-linear systems58). How many types of compensators are there? One Two Three Four HintThe compensators are of four types they are lead, lag, lag-lead, and lead-lag compensators59). The dynamic systems are classified into ____________ One Two Three Four Hint The dynamic systems are classified into four types they are SISO Vs MIMO, linear Vs non-linear, time-invariant Vs time-varying, and causal Vs non-causal system60). In which system the output at any instant of time depends only on past and current inputs? Causal Non-causal Time-invariant None of the above HintIn a causal system, the output at any instant of time depends only on past and current inputs61). __________ controller produces an output which is derivative of error signal Integral controller Derivative controller Proportional derivative controller None of the above Hint The derivative controller produces an output that is derivative of an error signalControl System MCQs with Hints62). __________ controller produces an output which is integral of error signal Integral controller Derivative controller Proportional derivative controller None of the above HintThe integral controller produces an output that is integral of an error signal63). __________ controller produces an output which is in the combination of the outputs of the proportional and derivative controller Integral controller Derivative controller Proportional derivative controller None of the above HintThe proportional derivative controller produces an output which is in the combination of the outputs of the The proportional and derivative controller64). ___________ are used to determine the magnitude of CLTF using OLTF M circles N circles Both a and b None of the above HintM circles are used to determine the magnitude of CLTF using OLTF, it is applicable only for unity feedback systems65). ___________ are used to determine the response of a closed-loop system using open-loop transfer function M circles N circles Both a and b None of the above HintN circles are used to determine the response of a closed-loop system using the open-loop transfer function66). For non-minimum phase system the poles are _________ Left side Right side Either left or right side None of the above HintFor non-minimum phase system, the poles are either left or right side67). How many plots do the bode plot consist of? One Two Three Four HintThe bode plot consists of two plots they are magnitude and phase plot68). In which frequency the maximum magnitude occurs? Resonant frequency Natural frequency Both a and b None of the above HintIn resonant frequency, the maximum magnitude occurs69). __________ is the frequency response technique Bode plot Polar plot Nyquist plot All of the above Hint The bode plot, polar plot, Nyquist plot, Nicholas chart are the frequency response techniques70). The systems are categorized into _____________ types based on stability One Two Three Four HintThe systems are categorized into three types based on stability they are absolutely stable, unstable, and conditionally stable system71). ____________ technique is used to calculate the stability Root locus, bode plot Nyquist plot, Nicholas chart Routh Hurwitz criterion All of the above HintThe root locus, bode plot, Nyquist plot, Nicholas chart, Routh Hurwitz criterion are the techniques used to calculate the stability72). When a control system is exited with a standard input signal then the steady-state error is __________ Zero Constant Infinite Zero or one or infinite HintWhen a control system is exited with a standard input signal then the steady-state error may be zero or one or infinite73). The state error constants are categorized into _________ One Two Three Four HintThe state error constants are categorized into three types they are positional, velocity, acceleration error constants74). _____________ are the examples of system Aircrafts Automobile Helicopters All of the above HintAircraft, Automobile, Helicopters, etc are examples of system75). The control systems are used in electrical systems to control _____________ in electrical system Voltage Current Both a and b None of the above HintThe control systems are used in electrical systems to control both voltage and current in an electrical system76). The example of an open-loop control system is _________ Electric iron Electric fan Water tank All of the above HintThe electric iron, electric fan, water tank are examples of an open-loop control system77). The example of an closed-loop control system is _________ Voltage stabilizers Automatic electronic iron Water tanks with float ball All of the above Hint The Voltage stabilizers, Automatic electronic iron, Water tanks with float ball are examples of the closed-loop control system78). What are the examples of control systems? Air conditioners Refrigerators Power system All of the above HintAir conditioners, refrigerators, power system are examples of control systems79). ___________ is used to allow a signal to be used by two or more blocks or summing points Branches Takeoff point Summing point None of the above HintTakeoff point is used to allow a signal to be used by two or more blocks or summing points80). _________ used for summation of two or more input signals Branches Takeoff point Summing point None of the above HintSumming point used for summation of two or more input signalsControl System MCQs for Exams81). How many outputs does the summing point have? One Two Three Four HintThe summing point has only one output and is equal to the algebraic sum of the input82). Which element indicated the direction of flow of signals in a system? Branches Takeoff point Summing point Arrows HintArrows indicate the direction of flow of signals in a system83). The force due to spring is expressed as __________ -Kx Kx –B dx/dt None of the above HintThe force due to spring is expressed as -Kx84). The force due to damper is expressed as __________ -Kx Kx –B dx/dt None of the above HintThe force due to the damper is expressed as –B dx/dt85). __________ are the basic elements of an electrical system Capacitor Resistor Inductor All of the above HintThe resistors, capacitors, inductors are the basic elements of an electrical system86). _____________ is defined as the flux linkage per unit current Inductance Capacitor Transistor Resistor HintInductance is defined as the flux linkage per unit current87). _________ is defined as a ratio of the charge to the voltage across the capacitor terminals Inductance Capacitor Transistor Resistor HintThe capacitor is defined as a ratio of the charge to the voltage across the capacitor terminals88). The potentiometers are categorized into _________ One Two Three Four HintThe potentiometers are categorized into two types they are translational and rotational potentiometers89). The stepper motor is a __________ device Electro-mechanical digital Electro-chemical digital Electro-mechanical analog None of the above HintThe stepper motor is an electro-mechanical digital device90). The step size of the stepper motor is typically between ___________ 1.5 to 20 deg 1.5 to 30 deg 1.5 to 60 deg 1.5 to 40 deg HintThe step size of the stepper motor is typically between 1.5 to 30 deg91). How many types of stepper motors are there? One Two Three Four HintThere are three types of stepper motors are there they are variable reluctance, permanent magnet & permanent magnet hybrid stepper motors92). How many stator poles does a permanent magnet stepper motor have? One Two Three Four Hint The permanent magnet stepper motor has four stator poles93). How many rotor poles does a permanent magnet stepper motor have? One Two Three six HintThe permanent magnet stepper motor has six rotor poles Read more about Stator Read more about Stepper Motor 94). The full step angle of permanent magnet stepper motor is around _________ 20 deg 30 deg 40deg 50 deg HintThe full step angle of the permanent magnet stepper motor is around 30 deg95). _________ are the applications of stepper motor Automatic control systems Used in computer peripheral systems In paper drive mechanisms All of the above Hint The stepper motors are used in computer peripheral systems, in paper drive mechanisms, and automatic control systems96). How many types of tacho generators are there? One Two Three six HintThere are two types of tacho generators are there they are AC and DC tacho generators Read more about Generators97). Tacho generator works on the principle of ___________generator Shunt Series Induction None of the above HintTacho generator works on the principle of induction generator98). The techo generator comprises of ___________ One stator winding, rotor Two stator windings, rotor Three stator windings, rotor None of the above HintThe tacho generator comprises of one stator winding and rotor99). How many types of servometers are there? One Two Three six HintThere are two types of servometers are there they are DC and AC servometers100). Which servomotor is a DC servo meter? Armature controlled Field controlled Both a and b None of the above HintBoth armature and field controlled servomotors are DC servo meters101). Error detector is available in _________ systems Open-loop Closed-loop Both a and b None of the above HintError detector is available in closed-loop systems102). The feedback is available in ___________ control system Open-loop Closed-loop Both a and b None of the above HintThe feedback is available in a closed-loop control system103). In which control system the sensitivity is less? Open-loop Closed-loop Both a and b None of the above HintIn a closed-loop control system, the sensitivity is less104). Which one is an example of servomechanism? Missile launcher Speed governor Frequency regulator None of the above HintThe missile launcher is an example of servomechanism105). Which one is an example for the regulator? Machine tool position control Roll stabilization in ships Missile launcher None of the above HintTeam regulator, speed governor, frequency regulator, etc are examples of regulating system106). How many types of hydraulic output devices are there? One Two Three Four HintThere are two types of hydraulic output devices are there they are hydraulic motors and hydraulic linear actuator107). The transfer function of an integrator is expressed as _______ T=1/S T=1/S+1 T=1/S-1 T=1/S+a HintThe transfer function of an integrator is expressed as T=1/S108). The transfer function of an differentiator is expressed as _______ T=S T=1/S+1 T=1/S-1 T=1/S+a HintThe transfer function of the differentiator is expressed as T=S109). The transfer function of a first-order system is expressed as _______ T=S T=1/S+1 T=1/S-1 T=1/S+a HintThe transfer function of a first-order system is expressed as T=1/S+a110). ________ is an example for state variable Current flowing through the inductor Voltage across a capacitor Both a and b None of the above HintThe current flowing through inductor and voltage across capacitor are examples for the state variable111). Based on the gain and phase margins the control system is stable when _________ Gain margin<1, the phase margin is positive Gain margin>1, the phase margin is positive Gain margin<1, the phase margin is Negative None of the above HintBased on the gain and phase margins the control system is stable when gain margin>1 and phase margin is positive112). Based on the gain and phase margins the control system is marginally stable when _________ Gain margin<1, the phase margin is positive Gain margin>1, the phase margin is positive Gain margin=1, the phase margin is zero degrees None of the above HintBased on the gain and phase margins the control system is marginally stable when gain margin=1 and phase margin is zero degrees113). Based on the gain and phase margins the control system is unstable when _________ Gain margin<1, the phase margin is negative Gain margin>1, the phase margin is positive Gain margin=1, the phase margin is zero degrees None of the above HintBased on the gain and phase margins the control system is unstable when gain margin<1 and phase margin is negative114). Based on the phase and gain cross over frequencies the control system is stable when __________ Phase cross over frequency>gain cross over frequency Phase cross over frequency<gain cross over frequency Phase cross over frequency=gain cross over frequency None of the above HintBased on the phase and gain cross over frequencies the control system is stable when phase cross over frequency>gain cross over frequency115). Based on the phase and gain cross over frequencies the control system is marginally stable when __________ Phase cross over frequency>gain cross over frequency Phase cross over frequency<gain cross over frequency Phase cross over frequency=gain cross over frequency None of the above HintBased on the phase and gain cross over frequencies the control system is marginally stable when phase cross over frequency=gain cross over frequency116). Based on the phase and gain cross over frequencies the control system is unstable when __________ Phase cross over frequency>gain cross over frequency Phase cross over frequency<gain cross over frequency Phase cross over frequency=gain cross over frequency None of the above HintBased on the phase and gain cross over frequencies the control system is unstable when phase cross over frequency<gain cross over frequency117). What are the specifications of the frequency domain? Resonant peak Resonant frequency Bandwidth All of the above HintThe resonant peak, resonant frequency, bandwidth are the specifications of the frequency domain118). How many types of connections are possible between the blocks? One Two Three Four HintThree types of connections are possible between the blocks they are parallel, serial, and feedback connections119). How many types of controllers are there? One Two Three Four HintThere are four types of controllers are there they are proportional, integral, proportional integral, and proportional integral differential controllers120). What are the functions of automatic control? Measurement Comparison, correction Computation All of the above HintThe measurement, comparison, correction, and computation are the functions of automatic control121). _______ is an example for natural control system Universe Vehicles Helicopters None of the above HintThe universe is an example of natural control system 122). ________ is an example for manmade control system Universe Vehicles Human body None of the above HintThe vehicle is an example of a manmade control system 123). ________ is an example for automatic control system Human body temperature control Water level control Vehicles None of the above HintHuman body temperature control is an example of an automatic control system 124). ________ is an example for manual control system Human body temperature control Water level control Vehicles None of the above HintWater level control is an example of a manual control system 125). The close loop control systems are categorized into ______ One Two Three Four HintThe close loop control systems are categorized into two types they are linear and non-linear closed-loop control systems126). The non-linear closed-loop control systems are again categorized into ______ One Two Three Four HintThe non-linear closed-loop control systems are again categorized into two types they are time-variant and time-invariant127). The open-loop and closed-loop control systems are ________ Natural control systems Manmade control systems Both a and b None of the above HintThe open-loop and closed-loop control systems are manmade control systems128). The AC servo system has __________ Low efficiency Low power output Fewer stability problems All of the above HintThe AC servo system has low efficiency, low power output, and fewer stability problems129). The DC servo system has __________ High efficiency High power output More stability problems All of the above HintThe DC servo system has high efficiency, high power output, and more stability problems130). Which servo system has non-linear characteristics? AC servo system DC servo system Both a and b None of the above HintThe AC servo system has non-linear characteristicsControl System Important MCQs131). The linear closed-loop control systems are again categorized into ______ One Two Three Four HintThe linear closed-loop control systems are again categorized into two types they are time-variant and time-invariant132). Which control system is a non-feedback control system? Open-loop Closed-loop Both a and b None of the above HintThe open-loop control system is a non-feedback control system133). How many types of transfer function model analyses are there? One Two Three Four HintThere are two types of transfer function model analysis are there they are response analysis and stability analysis134). Which one is a response analysis of the transfer function model? Time-domain analysis Frequency domain analysis Both a and b None of the above HintBoth time and frequency domain analyses are response analysis of the transfer function model135). Which one is a stability analysis of the transfer function model? Function model Nyquist Bode plot Gain and phase margins All of the above HintThe function model, Nyquist, bode plot, gain, and phase margins are the stability analysis of the transfer function model136). How many types of cascade connections are there? One Two Three Four HintThere are two types of cascade connections are there they are interactive and non-interactive cascade137). ________ are the applications of DC servomotor Machine tools Process controllers Robotics All of the above HintThe machine tools, process controllers, robotics, etc are the applications of DC servomotor138). How many types of actuators are there? One Two Three Four HintThere are three types of actuators are there they are hydraulic and pneumatic actuators and electric actuators139). The fluid used in pneumatic system is ________ Air Oil Water None of the above HintThe fluid used in the pneumatic system is air140). The fluid used in hydraulic system is ________ Air Oil Water None of the above HintThe fluid used in the hydraulic system is oil141). Which system is explosion-proof and fire-proof? Pneumatic Hydraulic Both a and b None of the above HintThe Pneumatic system is explosion-proof and fire-proof 142). The non-linearities are categorized into _________ One Two Three Four HintThe non-linearities are categorized into two types they are inherent and intentional non-linearities143). The electric actuators are categorized into _________ One Two Three Four HintThe electric actuators are categorized into three types they are DC motor, stepper motor, and AC motor144). The stepper motors are of _______ One Two Three Four HintThe stepper motors are of two types they are variable reluctance motor and permanent magnet motor145). _________ sensor is used in home heating systems Temperature sensor Thermostat sensor Float sensor None of the above HintA temperature sensor is used in home heating systems146). _________ sensor is used in automotive engine Temperature sensor Thermostat sensor Float sensor None of the above HintThe thermostat sensor is used in automotive engine Read more about Sensors147). _________ sensor is used in toilet tank water level Temperature sensor Thermostat sensor Float sensor None of the above HintFloat sensor is used in toilet tank water level148). The multimedia contains _______ Voice, music Video, animation Graphics All of the above HintThe multimedia contains voice, music, video, animation, and graphics149). The regenerative feedback is also known as ______ Positive feedback Negative feedback Both a and b None of the above HintThe regenerative feedback is also known as positive feedback150). Which magnet is used in DC motor construction? Permanent magnet Plastics Electromagnet None of the above HintThe permanent magnet is used in DC motor construction151). The rotors has _________ No windings No brushes No commutators All of the above HintThe rotors have no windings, brushes, & commutators152). Which valve restricts the airflow? Throttle valve Shuttle valve Both a and b None of the above HintThe valve which restricts the airflow is a throttle valve153). For a unit step input the steady-state error is _______ 1/1+KP 1/1-KP 1/KP None of the above HintFor a unit step input the steady-state error is 1/1+KP154). The control systems invented by ______ James Clerk Maxwell Charles Denis Papin None of the above HintThe control systems invented by James Clerk Maxwell155). In control systems the controller output is given to __________ Amplifier Sensor Final control element None of the above HintIn control systems, the controller output is given to the final control element156). ____________ signal is an input to the controller Error Servo Sensed None of the above HintThe error signal is an input to the controller157). The low power AC motors and DC motors are called as ________ Tachogenerators AC and DC generators Servomotors None of the above HintThe low power AC motors and DC motors are called servo motors158). The lubricator is a _____ element in the pneumatic circuit First Second Third Last HintThe lubricator is the last element in the pneumatic circuit159). The peak overshoot and damping ratio are measures of ____________ Speed of response Steady-state error Both a and b None of the above HintThe peak overshoot and damping ratio are measures of speed of response160). In a closed-loop control system, the peak percentage overshoot is around _______ 20% 30% 40% 16.3% HintIn a closed-loop control system, the peak percentage overshoot is around 16.3%Control Systems Important MCQs for Students161). Hydraulic controller requires __________ operation High speed High torque Both a and b None of the above HintHydraulic controller requires both high speed and high torque operations162). Pneumatic controller requires __________ for its operation Air Gas fuel Both a and b None of the above HintPneumatic controller requires air and gas fuel for its operation Read more about Temperature Controller163). The electronic controller operation is __________ Flexible Not flexible Requires high torque operation None of the above HintThe electronic controller operation is flexible164). For minimum phase system poles lies on __________ and zeros lies on _______plane Poles lies on left Poles lies on the right Zeros lies on left Both a and c HintFor the minimum phase system poles lies on the left plane and zeros also lies on the left plane165). For non minimum phase system poles lies on __________ and zeros lies on _______plane Poles lies on left Zeros lies on the right Zeros lies on left Both a and b HintFor the non-minimum phase system poles lies on the left plane and zeros lies on the right plane166). The minimum phase system and all-pass system constitute _______ Maximum phase system Non-maximum phase system Minimum phase system Non-minimum phase system HintThe minimum phase system and all-pass system constitute a non-minimum phase system167). The radius size for Nyquist contour is _______ One Zero Infinite None of the above HintThe radius size for Nyquist contour is infinite168). _________ margin measures relative stability Phase Gain Both a and b None of the above HintBoth phase and gain margins measures relative stability169). Gain margin is __________ in second-order system One Zero Infinite None of the above HintThe gain margin is infinite in a second-order system170). The measure of relative stability is __________ in frequency domain Phase margin Resonant peak Both a and b None of the above HintThe measure of relative stability is phase margin and resonant peak in the frequency domain171). The speed of response in the time domain is measure in terms of _______ Settling and rise time Natural frequency Both a and b None of the above HintThe speed of response in the time domain is measure in terms of natural frequency, settling, and rise time172). The speed of response in the frequency domain is measure in terms of _______ Settling and rise time Resonant peak Bandwidth Both b and c HintThe speed of response in the frequency domain is measure in terms of resonant peak and bandwidth173). AC servomotor is a __________ induction motor Single phase Double phase Triple phase None of the above HintAC servomotor is a triple-phase induction motor174). The raster images also called as _______ images Clipart Vector Bitmap None of the above HintThe raster images also called bitmap images175). In a closed-loop system the relation between output response and input signal is ________ Linear Parabolic Non-linear None of the above HintIn a closed-loop system, the relation between output response and the input signal is linear Time is Up! Time's up