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increases the steady state accuracy.


A) integrator
B) differentiator
C) phase lead compensator
D) phase lag compensator

E) All of the above
F) None of the above

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In open loop system


A) the control action depends on the size of the system
B) the control action depends on system variables
C) the control action depends on the input signal
D) the control action is independent of the output

E) None of the above
F) A) and C)

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has tendency to oscillate.


A) open loop system
B) closed loop system
C) both (a) and (b)
D) neither (a) nor (b)

E) B) and C)
F) A) and D)

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B

The initial response when tne output is not equal to input is called


A) transient response
B) error response
C) dynamic response
D) either of the above

E) B) and C)
F) A) and B)

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A

Which of the following is an open loop control system ?


A) field controlled d.c. motor
B) ward leonard control
C) metadyne
D) stroboscope

E) None of the above
F) A) and C)

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Which of the following devices are commonly used as error detectors in instruments ?


A) vernistats
B) microsyns
C) resolvers
D) any of the above

E) A) and D)
F) None of the above

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By which of the following the control action is determined when a man walks along a path ?


A) brain
B) hands
C) legs
D) eyes

E) A) and B)
F) A) and C)

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As a result of introduction of negative feedback which of the following will not decrease ?


A) band width
B) overall gain
C) distortion
D) instability

E) C) and D)
F) All of the above

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A closed loop system is distinguished from open loop system by which of the following ?


A) servomechanism
B) feedback
C) output pattern
D) input pattern

E) B) and C)
F) None of the above

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For open control system which of the following statements is incorrect ?


A) less expensive
B) recalibration is not required for maintaining the required quality of the output
C) construction is simple and maintenance easy
D) errors are caused by disturbances

E) None of the above
F) A) and D)

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A control system working under unknown random actions is called


A) computer control system
B) digital data system
C) stochastic control system
D) adaptive control system

E) B) and D)
F) None of the above

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In closed loop control system, with positive value of feedback gain the overall gain of the system will


A) decrease
B) increase
C) be unaffected
D) any of the above

E) A) and C)
F) C) and D)

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is a part of the human temperature control system.


A) digestive system
B) perspiration system
C) ear
D) leg movement

E) A) and B)
F) A) and D)

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A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?


A) clutch
B) eyes
C) needle of the speedometer
D) steering wheel

E) All of the above
F) C) and D)

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Which of the following statements is not necessarily correct for open control system ?


A) input command is the sole factor responsible for providing the control action
B) presence of non-linearities causes malfunctioning
C) less expensive
D) generally free from problems of non-linearities

E) None of the above
F) B) and C)

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A good control system has all the following features except


A) good stability
B) slow response
C) good accuracy
D) sufficient power handling capacity

E) All of the above
F) None of the above

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B

is an open loop control system.


A) ward leonard control
B) field controlled d.c. motor
C) stroboscope
D) metadyne

E) A) and B)
F) C) and D)

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In an open loop control system


A) output is independent of control input
B) output is dependent on control input
C) only system parameters have effect on the control output
D) none of the above

E) None of the above
F) A) and B)

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An automatic toaster is a ______ loop control system.


A) open
B) closed
C) partially closed
D) any of the above

E) B) and D)
F) C) and D)

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Regenerative feedback implies feedback with


A) oscillations
B) step input
C) negative sign
D) positive sign

E) A) and C)
F) All of the above

Correct Answer

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