| Que. 1 |
In the Bode plot of a unit feedback control system, the value of the phase
of G(jw) at the gain cross over frequency is -125degree the phase margin
of the system is |
| A |
|
-125 degree |
| B |
|
-55 degree |
| C |
|
55 degree |
| D |
|
125 degree |
|
| Que. 2 |
the transfer function of a system is [2s^2+6s+5]/[(s+1)^2.(s+2)]
the characteristic equation of the system is |
| A |
|
2s^2+6s+5=0 |
| B |
|
(s+1)^2(s+2)=0 |
| C |
|
2s^2+6s+5+(s+1)^2(s+2)=0 |
| D |
|
2s^2+6s+5-(s+1)^2(s+2)=0 |
|
| Que. 3 |
for the system described by the state equaction
|0 1 0| |0|
x= |0 0 1|x + |0|u
|0.5 1 2| |1|
if thecontrol signal u is given by u=[-0.5 -3 -5]x+v, then the value eigenvalues of the
closed loop system will be |
| A |
|
0,-1,-2 |
| B |
|
0,-1,-3 |
| C |
|
-1,-1,-2 |
| D |
|
0,-1,-1 |
|
| Que. 4 |
A system described by the transfer function H(s)=1/[ s^3+as^2+ks+3]
is stable. the constraints on a and k are |
| A |
|
a>0,ak<3 |
| B |
|
a>0,ak>3 |
| C |
|
a<0,ak>0 |
| D |
|
a>0,ak<0 |
|
| Que. 5 |
If a signal f(t) has energy E,the energy of the signal f(2t)= |
| A |
|
E |
| B |
|
E/2 |
| C |
|
2E |
| D |
|
4E |
|
| Que. 6 |
The open loop transfer function of a feed back control system is G(s)H(S)=1/(s+1)^3.
The gain margin of the system is |
| A |
|
2 |
| B |
|
4 |
| C |
|
8 |
| D |
|
16 |
|
| Que. 7 |
An advantage of memory interlacing is that |
| A |
|
a large memory is obtaind |
| B |
|
effective speed of the memory is increased |
| C |
|
the cost of the memory is reduced |
| D |
|
in an voltatile memory is obtained |
|
| Que. 8 |
When the root of a charecteristic equation are conjugate and on the imaginary
axis, the response is of the type |
| A |
|
A sin(wt+beta) |
| B |
|
Ae^(o-t) |
| C |
|
Ae^-(o-t) |
| D |
|
A ln(o-t) |
|
| Que. 9 |
A degreereferigerable monoshot is one which |
| A |
|
can be triggered only once |
| B |
|
has two Quasi-stable states |
| C |
|
cannot be triggered untill full pulse has been outonly once |
| D |
|
is capable of being triggered while the out put is being |
|
| Que. 10 |
Well designed firstorder controll systems have |
| A |
|
A -ve time constant |
| B |
|
A small band width |
| C |
|
A small -ve even value |
| D |
|
A large -ve transfer function pole |