Electrical Control Systems(Engineering > Electrical Engineering ) Questions and Answers

Question 1. 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
Question 2. 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 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. In an open loop control system
  1.    Output is independent of control input
  2.    Output is dependent on control input
  3.    Only system parameters have effect on the control output
  4.    None of the above
Explanation:-
Answer: Option A. -> Output is independent of control input
Question 7. Due to which of the following reasons excessive bond width in control systems should be avoided ?
  1.    It leads to slow speed of response
  2.    It leads to low relative stability
  3.    Noise is proportional to band width
  4.    None of the above
Explanation:-
Answer: Option C. -> Noise is proportional to band width
Question 8. Hydraulic torque transmission system is analog of
  1.    amplidyne set
  2.    resistance-capacitance parallel circuit
  3.    motor-generator set
  4.    any of the above
Explanation:-
Answer: Option C. -> motor-generator set
Question 9. If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is
  1.    not necessarily stable
  2.    stable
  3.    unstable
  4.    always unstable
  5.    any of the above
Explanation:-
Answer: Option A. -> not necessarily stable
Question 10. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?
  1.    Frequency
  2.    Loop gain
  3.    Forward gain
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
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