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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 5:46pm


Que. 1 An open loop transfer function, is given by G(s)      H(s)=K(s+1)/s(s+2)(s^2+2s+2) 
it has
A
one zero at infinity
B
two zero at infinity
C
three zero at infinity
D
four zero at infinity

Que. 2 The principles of homogenity and superposition are applied to
A
linear time varieant system
B
non-linear time varieant system
C
linear time invarieant system
D
non-linear time invarieant system

Que. 3 In the deriative error compensation
A
damping decreases and settling time decreases
B
damping increases and settling time increases
C
damping decreases and settling time increases
D
damping increases and settling time decreases

Que. 4 The lapalace transformation of f(t) is F(s). given F(s)=w/s^2+w^2, the 
final value of   f(t) is
A
infinity
B
0
C
1
D
none of the above

Que. 5 Natural freq. of a unity feed back control system of transfer function 
G(s)=10/s(s+1) is
A
3.16 rad/s
B
0.5 rad/s
C
4.6 rad/s
D
none ofthese

Que. 6 The position and acceleration error cofficients for the open loop transfer 
function  G(s)=K/s^2(s+10)(s+100) respictively are
A
0 and infinity
B
infinity and 0
C
k/100 and 0
D
infinity and k/1000

Que. 7 The position and velocity error cofficients for thesystem of transfer 
function    G(s)=50/(1+.1s)(1+2s)
A
0,0
B
0,infinity
C
50,0
D
50,infinity

Que. 8 A system has the transfer function (1-s)/(1+s) it is known as
A
low pass system
B
high pass system
C
all pass system
D
none of these

Que. 9 The transfer of a system is 10/1+s. when operatedas unity fedback system,the 
steady state  error  to a unit step input will be
A
0
B
1/11
C
10
D
infinity

Que. 10 A phase lead compensator has the transfer function G(s)=10(1+0.4s)/(1+0.1s) 
the maximum   phase angle lead provided by this compensator will occure 
at a freq. wm is equal to
A
50 rad/sec
B
25 rad/sec
C
10 rad/sec
D
4 rad/sec




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