Control System Quiz | Control System Multiple Choice Questions and Answers

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Questions
1 Which of the following should be done to make an unstable system stable ?
A The gain of the system should be decreased
B The gain of the system should be increased
C The number of poles to the loop transfer function should be increased
D The number of zeros to the loop transfer function should be increased

Answer: The gain of the system should be increased
2 Which of the following devices are commonly used as error detectors in instruments ?
A Vernistats
B Microsyns
C Resolvers
D Any of the above

Answer: Any of the above
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3 Is a closed loop system.
A Auto-pilot for an aircraft
B Direct current generator
C Car starter
D Electric switch

Answer: Auto-pilot for an aircraft
4 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

Answer: Eyes
5 Is a part of the human temperature control system.
A Digestive system
B Perspiration system
C Ear
D Leg movement

Answer: Perspiration system
6 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

Answer: Feedback
7 Any externally introduced signal affecting the controlled output is called a
A feedback
B stimulus
C signal
D gain control

Answer: stimulus
8 An automatic toaster is a ______ loop control system.
A open
B closed
C partially closed
D any of the above

Answer: open
9 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

Answer: stochastic control system
10 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

Answer: Transient response
11 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

Answer: Needle of the speedometer
12 A good control system has all the following features except
A good stability
B slow response
C good accuracy
D sufficient power handling capacity

Answer: slow response
13 has tendency to oscillate.
A Open loop system
B Closed loop system
C Both (a) and (b)
D None of the above

Answer: Closed loop system
14 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

Answer: the control action is independent of the output
15 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

Answer: Presence of non-linearities causes malfunctioning
16 Which of the following is an open loop control system ?
A Field controlled D.C. motor
B Ward leonard control
C Metadyne
D Stroboscope

Answer: Field controlled D.C. motor
17 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

Answer: decrease
18 A control system in which the control action is somehow dependent on the output is known as
A Closed loop system
B Semiclosed loop system
C Open system
D None of the above

Answer: Closed loop system
19 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

Answer: Recalibration is not required for maintaining the required quality of the output
20 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

Answer: Output is independent of control input

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