Control System Quiz | Control System Multiple Choice Questions with Answers

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Questions
61 In a stable control system saturation can cause which of the following ? Ans:
A Low-level oscillations
B High-level oscillations
C Conditional stability
D None of the above

Answer: High-level oscillations
62 The phase lag produced by transportation relays
A is independent of frequency
B is inverseh’proportional to frequency
C increases linearly with frequency
D decreases linearly with frequency

Answer: increases linearly with frequency
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63 In order to increase the damping of a badly underdamped system which of following compensators may be used ?
A Phase-lead
B Phase-lag
C Both (a) and (b)
D None of the above

Answer: Phase-lead
64 technique is not applicable to nonlinear system ?
A Nyquist Criterion
B Quasi linearization
C Functional analysis
D Phase-plane representation

Answer: Nyquist Criterion
65 Addition of zeros in transfer function causes which of the following ?
A Lead-compensation
B Lag-compensation
C Lead-lag compensation
D None of the above

Answer: Lag-compensation
66 Phase margin of a system is used to specify which of the following ?
A Frequency response
B Absolute stability
C Relative stability
D Time response

Answer: Relative stability
67 Which of the following is the best method for determining the stability and transient response ?
A Root locus
B Bode plot
C Nyquist plot
D None of the above

Answer: Root locus
68 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
A not necessarily stable
B stable
C unstable
D always unstable

Answer: not necessarily stable
69 In case of type-1 system steady state acceleration is
A unity
B infinity
C zero
D 10

Answer: infinity
70 Velocity error constant of a system is measured when the input to the system is unit _______ function.
A parabolic
B ramp
C impulse
D step

Answer: ramp
71 The position and velocity errors of a type-2 system are
A constant, constant
B constant, infinity
C zero, constant
D zero, zero

Answer: zero, constant
72 The type 2 system has ______ at the origin.
A no net pole
B net pole
C simple pole
D two poles

Answer: two poles
73 The type 1 system has ______ at the origin.
A no pole
B net pole
C simple pole
D two poles

Answer: simple pole
74 The type 0 system has ______ at the origin.
A no pole
B net pole
C simple pole
D two poles

Answer: no pole
75 A conditionally stable system exhibits poor stability at
A low frequencies
B reduced values of open loop gain
C increased values of open loop gain
D none of the above

Answer: reduced values of open loop gain
76 Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal.
A acceleration
B velocity
C position
D all of the above

Answer: all of the above
77 An increase in gain, in most systems, leads to
A smaller damping ratio
B larger damping ratio
C constant damping ratio
D none of the above

Answer: smaller damping ratio
78 The frequency and time domain are related through which of the following?
A Laplace Transform and Fourier Integral
B Laplace Transform
C Fourier Integral
D Either (b) or (c)

Answer: Laplace Transform and Fourier Integral
79 Spring constant in force-voltage analogy is analogous to
A capacitance
B reciprocal of capacitance
C current
D resistance

Answer: reciprocal of capacitance
80 Hydraulic torque transmission system is analog of
A amplidyneset
B resistance-capacitance parallel circuit
C motor-generator set
D any of the above

Answer: resistance-capacitance parallel circuit
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