1. Electronic control systems have the serious draw-backs of
(a) low reliability (b) operational difficulty (c) temperature sensitiveness (d) all of above
2. The system whose characteristic equation has the following roots is marginally stable
(a) -j, j, -1,1 (b) -3,-2,0 (c) -2+3j, -2-3j, -2 (d) -3,-2,-1
3. A phase log compensation will
(a) improve relative stability
(b)increase the speed of response
(c)increase band-width
(d) increase overshoot
4. For Nyquist plot we use
a. open loop function
b. closed loop function
c. characteristic equation
d. any of the above
• A system with gain margin close to unity or a phase margin close to zero is
a. highly stable
b. oscillatory
c. relatively stable
d. none of these
• Root locus diagram exhibits the
a. frequency response of a system
b. poles of the transfer function for a set of parameter values
c. bandwidth of system
d. all of the above
• Increase in the gain K makes the system
a. more stable
b. unstable
c. none of above
• The transfer function of a system is used to determine
a. the output for a given input
b. the type of system
c. the input for a given output
d. the steady state gain
• In a servo system the voltage induced in the control transformer rotor is the
a. error voltage
b. driving voltage
c. opposing voltage
d. none of these
• With the feedback system, the transient response
a. decays slowly
b. decays rapidly
c. rises slowly
d. rises quickly
See Also……