Electrical Control Systems(Electrical Engineering ) Questions and Answers

Question 1. With feed back _____ reduces.
  1.    system stability
  2.    system gain
  3.    system stability and gain
  4.    none of the above
Explanation:-
Answer: Option B. -> system gain
Question 2. The position and velocity errors of a type-2 system are
  1.    constant, constant
  2.    constant, infinity
  3.    zero, constant
  4.    zero, zero
Explanation:-
Answer: Option C. -> zero, constant
The position and velocity error of the type 2 system is zero and a constant value as for type 2 system velocity error is finite while acceleration error is infinite.
Question 3. Is a closed loop system.
  1.    Auto-pilot for an aircraft
  2.    Direct current generator
  3.    Car starter
  4.    Electric switch
Explanation:-
Answer: Option A. -> Auto-pilot for an aircraft
Question 4. The effect of error damping is to
  1.    provide larger settling lime
  2.    delay the response
  3.    reduce steady state error
  4.    any of the above
  5.    none of the above
Explanation:-
Answer: Option C. -> reduce steady state error
Question 5. The band width, in a feedback amplifier.
  1.    remains unaffected
  2.    decreases by the same amount as the gain increase
  3.    increases by the sane saaaajajt as the gain decrease
  4.    decreases by the same amount as the gain decrease
Explanation:-
Answer: Option C. -> increases by the sane saaaajajt as the gain decrease
Question 6. A control system working under unknown random actions is called
  1.    Computer control system
  2.    Digital data system
  3.    Stochastic control system
  4.    Adaptive control system
Explanation:-
Answer: Option C. -> Stochastic control system
Question 7. Which of the following is an open loop control system ?
  1.    Field controlled D.C. motor
  2.    Ward leonard control
  3.    Metadyne
  4.    Stroboscope
Explanation:-
Answer: Option A. -> Field controlled D.C. motor
Question 8. Which of the following devices is used for conversion of co-ordinates ?
  1.    Microsyn
  2.    Selsyn
  3.    Synchro-resolver
  4.    Synchro-transformer
Explanation:-
Answer: Option C. -> Synchro-resolver
Question 9. Which of the following is exhibited by Root locus diagrams ?
  1.    The poles of the transfer function for a set of parameter values
  2.    The bandwidth of the system
  3.    The response of a system to a step input
  4.    The frequency response of a system
  5.    None of the above
Explanation:-
Answer: Option A. -> The poles of the transfer function for a set of parameter values
Question 10. From which of the following transfer function can be obtained ?
  1.    Signal flow graph
  2.    Analogous table
  3.    Output-input ratio
  4.    Standard block system
  5.    None of the above
Explanation:-
Answer: Option A. -> Signal flow graph
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