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Free download in PDF Control System Multiple Choice Questions with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
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
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
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
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
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
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
71
The position and velocity errors of a type-2 system are
[A]
constant, constant
[B]
constant, infinity
[C]
zero, constant
[D]
zero, zero
72
The type 2 system has ______ at the origin.
[A]
no net pole
[B]
net pole
[C]
simple pole
[D]
two poles
73
The type 1 system has ______ at the origin.
[A]
no pole
[B]
net pole
[C]
simple pole
[D]
two poles
74
The type 0 system has ______ at the origin.
[A]
no pole
[B]
net pole
[C]
simple pole
[D]
two poles
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
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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