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This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on Linear Programming Problem Set 1
Q1 | In an open loop control system
- output is independent of control input
- output is dependent on control input
- only system parameters have effect on the control output
- none of the above
Q2 | For open control system which of the following statements is incorrect ?
- less expensive
- recalibration is not required for maintaining the required quality of the output
- construction is simple and maintenance easy
- errors are caused by disturbances
Q3 | A control system in which the control action is somehow dependent on the output is known as
- closed loop system
- semiclosed loop system
- open system
- none of the above
Q4 | In closed loop control system, with positive value of feedback gain the overall gain of the system will
- decrease
- increase
- be unaffected
- any of the above
Q5 | Which of the following is an open loop control system ?
- field controlled d.c. motor
- ward leonard control
- metadyne
- stroboscope
Q6 | Which of the following statements is not necessarily correct for open control system ?
- input command is the sole factor responsible for providing the control action
- presence of non-linearities causes malfunctioning
- less expensive
- generally free from problems of non-linearities
Q7 | In open loop system
- the control action depends on the size of the system
- the control action depends on system variables
- the control action depends on the input signal
- the control action is independent of the output
Q8 | has tendency to oscillate.
- open loop system
- closed loop system
- both (a) and (b)
- neither (a) nor (b)
Q9 | A good control system has all the following features except
- good stability
- slow response
- good accuracy
- sufficient power handling capacity
Q10 | A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
- clutch
- eyes
- needle of the speedometer
- steering wheel
Q11 | The initial response when tne output is not equal to input is called
- transient response
- error response
- dynamic response
- either of the above
Q12 | A control system working under unknown random actions is called
- computer control system
- digital data system
- stochastic control system
- adaptive control system
Q13 | An automatic toaster is a ______ loop control system.
- open
- closed
- partially closed
- any of the above
Q14 | Any externally introduced signal affecting the controlled output is called a
- feedback
- stimulus
- signal
- gain control
Q15 | A closed loop system is distinguished from open loop system by which of the following ?
- servomechanism
- feedback
- output pattern
- input pattern
Q16 | is a part of the human temperature control system.
- digestive system
- perspiration system
- ear
- leg movement
Q17 | By which of the following the control action is determined when a man walks along a path ?
- brain
- hands
- legs
- eyes
Q18 | Which of the following devices are commonly used as error detectors in instruments ?
- vernistats
- microsyns
- resolvers
- any of the above
Q19 | Which of the following should be done to make an unstable system stable ?
- the gain of the system should be decreased
- the gain of the system should be increased
- the number of poles to the loop transfer function should be increased
- the number of zeros to the loop transfer function should be increased
Q20 | increases the steady state accuracy.
- integrator
- differentiator
- phase lead compensator
- phase lag compensator
Q21 | A.C. servomotor resembles
- two phase induction motor
- three phase induction motor
- direct current series motor
- universal motor
Q22 | As a result of introduction of negative feedback which of the following will not decrease ?
- band width
- overall gain
- distortion
- instability
Q23 | Regenerative feedback implies feedback with
- oscillations
- step input
- negative sign
- positive sign
Q24 | is an open loop control system.
- ward leonard control
- field controlled d.c. motor
- stroboscope
- metadyne
Q25 | A control system with excessive noise, is likely to suffer from
- saturation in amplifying stages
- loss of gain
- vibrations
- oscillations