Test: Automatic Control Systems - 6
25 Questions MCQ Test | Test: Automatic Control Systems - 6
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A phase lead network with 
where a < 1, gives maximum phase lead at a frequency equal to
where a < 1, gives maximum phase lead at a frequency equal toIf C is thermal capacitance, m is mass of liquid and c is specific heat, then
Assertion (A): The concept of impulse function is useful in differentiating discontinuous functions.
Reason (R): 
In a two phase servomotor, if R is rotor resistance, X is rotor reactance, L is rotor length D is rotor diameter then
For the log magnitude Bode plot of the given figure, the transfer function is
A first-order system has a time constant t. For unit ramp input, the steady state error is
For the equation 
where Q is heat energy, Ct is thermal capacitance and θ is temperature, the analogous electrical equation is
Optical encoders most commonly used in control systems are
A second order system exhibits 100% overshoot. The damping ratio is
The log magnitude curve for a constant gain K is a horizontal straight line at a magnitude 20 log K dB.
Transfer functions of even complicated components can be found by frequency response tests.
The shape of torque-speed curve of a two phase servo- motor mostly depends on
In a lag network the input frequency is 100 fc where fc is critical frequency. The voltage gain is
Assertion (A): Temperature control of the passenger compartment of car uses both feed forward and feedback controls.
Reason (R): Feed forward control gives corrective action before the disturbance affects the output and feedback control applies corrective action after output changes.
The correct sequence of events to improve system stability is
Assertion (A): Most of actual systems are non-linear.
Reason (R): Non linearity may be due to saturation, dead zone, square law etc.
The static equation of a system is 
The poles of this system are located at
The pole-zero configuration of the given figure can be for
Which of the following represents constant magnitude locus for M = 1?
Assertion (A): A synchro control transformer has nearly constant impedance across its rotor terminals.
Reason (R): Rotor of a synchro control transformer is cylindrical so as to give uniform flux distribution.
The log magnitude plot of the given figure is for
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