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Arpita
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Joined: 04Jan2007
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Quote Arpita Replybullet Topic: Control system sample questions for GATE exam
    Posted: 09Jan2007 at 5:50pm


Que. 1 Signal flow graph is used to find
A
stability of the system
B
controllability of the system
C
transfer function of the system
D
poles of the system

Que. 2 The transfer function of a linear system is the
A
ratio of the output Vo(t) and input V1(t)
B
ratio ofthe derivatives of the output and the input
C
ratio ofthe  laplace transform of the output and that of the 
input with all initial   conditions   zero
D
none of these

Que. 3 The transfer function of a tachometer is of the form
A
Ks
B
K/s
C
K/s+1
D
K/[s(s+1)]

Que. 4 consider a unity feedback control system with open-loop transfer function 
G(s)=K/[s(s+1)] thesteady state error of the system due to a unit step 
input is
A
0
B
K
C
1/K
D
infinity

Que. 5 The transfer function of a zero order hold system is
A
(1/s)(1+e^-st)
B
(1/s)(1-e^-st)
C
1-(1/s)e^-st
D
1+(1/s)e^-st

Que. 6 Consider the feedback control system with loop transfer function  G(s)H(s)=K(1+.5s)/s(1+s)(1+2s)
A
0
B
1
C
2
D
3

Que. 7 non minimum phase transfer function is defined as the transfer function
A
which has zeros in right half S plane
B
which has zeros only in left  half S plane
C
which has poles in right half S plane
D
which has poles in left half S plane

Que. 8 Consider a unity feedback control system with open loop transfer function 
       G(s)= k/[s(s+1)].the steady state error of the system due to a 
unit step input is
A
0
B
K
C
1/K
D
infinite

Que. 9 The transfer function of a phase lead controller is [1+3Ts]/[1+Ts]  the 
maximum value  of phase provided by the controller is
A
90 degree
B
60 degree
C
45 degree
D
30 degree

Que. 10 A memory system of size  26kbytes is required to be designed using memory 
chips which  have 12 address lines and 4 data lines each. the number of 
such chips required to design   the memory system is
A
2
B
4
C
8
D
16




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