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Quiz 2
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Q.1
Servomotor:
armature controlled fhp dc motor
a pair of synchronous transmitter and control transformer
tach generator
amplidyne
Q.2
The addition of open loop zero pulls the root loci towards:
the left and therefore system becomes more stable
the right and therefore system becomes unstable
imaginary axis and therefore system becomes marginally stable
the left and therefore system becomes unstable
Q.3
If root loci plots of a particular control system do not intersect the imaginary axis at any point, then the gain margin of the system will be:
0
0.707
1
infinite
Q.4
When the number of poles is equal to the number of zeroes, how many branches of root locus tends towards infinity?
1
2
equal to number of zeroes
Q.5
When the number of poles is equal to the number of zeroes, how many branches of root locus tends towards infinity?
1
2
equal to number of zeroes
Q.6
System transformation on function H(z) for a discrete time LTI system expressed in state variable form with zero initial condition
-1b+d
c(zi-a)-1
(zi-a)-1z
(zi-a)-1
Q.7
System transformation on function H(z) for a discrete time LTI system expressed in state variable form with zero initial condition
-1b+d
c(zi-a)-1
(zi-a)-1z
(zi-a)-1
Q.8
State space analysis is applicable for non- linear systems and for multiple input and output systems.
true
false
Q.9
State space analysis is applicable for non- linear systems and for multiple input and output systems.
true
false
Q.10
When human being tries to approach an object, his brain acts as,
an error measuring device
a controller
an actuator
an amplifier
Q.11
For two-phase AC servomotor, if the rotor’s resistance and reactance are respectively R and X, its length and diameter are respectively L and D then,
x/r and l/d are both small
x/r is large but l/d is small
x/r is small but l/d is large
x/r and l/d are both large
Q.12
Complex conjugate pair:
center
focus point
saddle point
stable node
Q.13
A transfer function of the system does not have pole-zero cancellation? Which of the following statements is true?
system is neither controllable nor observable
system is completely controllable and observable
system is observable but uncontrollable
system is controllable and unobservable
Q.14
Consider a system if represented by state space equation and x1 (t) =x2 (t), then the system is:
controllable
uncontrollable
observable
unstable
Q.15
Kalman’s test is for :
observability
controllability
optimality
observability and controllability
Q.16
Kalman’s test is for :
observability
controllability
optimality
observability and controllability
Q.17
A system is said to be if it is possible to transfer the system state from any initial state to any desired state in finite interval of time.
controllable
observable
cannot be determined
controllable and observable
Q.18
A system is said to be if it is possible to transfer the system state from any initial state to any desired state in finite interval of time.
controllable
observable
cannot be determined
controllable and observable
Q.19
With feedback reduces.
system stability
system gain
system stability and gain
none of the mentioned
Q.20
In a control system integral error compensation steady state error
increases
minimizes
does not have any effect on
all of the mentioned
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