# Load frequency control is achieved by properly matching the individual machine's

1.  reactive powers

2.  generated voltages

3.  turbine inputs

4.  turbine and generator ratings

4

turbine inputs

Explanation :
No Explanation available for this question

# A system is described by the state equation X=AX+BU The output is given by Y=CX where, A=,B= Transfer function G(s)of the system is

1.  s/s2+5s+7

2.  1/ s2+5s+7

3.  s/ s2+3s+2

4.  1/ s2+3s+2

4

s/s2+5s+7

Explanation :
No Explanation available for this question

# The incremental cost characteristics of the two units in a plant are given by Ic1 = Rs (0.1 P1 + 8.0) per MWh Ic2 = Rs (0.15.P2 + 3.0) per MWh The optimum sharing of load when the total load is 100 MW is

1.  P1=60 MW and P2=40 MW

2.  P1= 33.3 MW and P2= 66.7 MW

3.  P1= 40 MW and P2= 60 MW

4.   P1= 66.7 MW and P2 = 33.3 MW

4

P1= 40 MW and P2= 60 MW

Explanation :
No Explanation available for this question

# The matrix of any state-space equation for the transfer function C(s)/R(s) of the system shown below in the figure is

1.

2.

3.  [-1]

4.  

4

[-1]

Explanation :
No Explanation available for this question

# in a power station, the cost of generation of power reduces most, effectively when

1.  diversity factor alone increase

2.  both diversity factor and lead factor increases

4.  both diversity factor and load factor decreases .

4

both diversity factor and load factor decreases .

Explanation :
No Explanation available for this question

# The transfer function Y(s) /U(s) of a system described by the state equations x(t) = - 2x (t) + 2 u(t) and y(t) = 0.5 s(t), is

1.  0.5 /(s - 2)

2.  1/(s-2)

3.  0.5/(s+2)

4.  1/(s + 2)

4

1/(s + 2)

Explanation :
No Explanation available for this question

# In the optimum generator scheduling of different power plants, the minimum fuel cost is obtained when

1.  only the incremental fuel cost oif each Plant is the same

2.  the penalty factor of each plant is the same

3.  the ratio of the incremental fuel cost to the penalty factoir of each plant is the same

4.  the incremental fuel cost of each plant multiplied by, its penalty factor is the same .

4

the incremental fuel cost of each plant multiplied by, its penalty factor is the same .

Explanation :
No Explanation available for this question

# A linear second-order single-input continuous-time system is described by the following set of differential equation: X1(t)=-2X1(t)+4X2(t) X2(t)=2X1-X2(t)+u(t) where X1(t)and X2(t) are the state variables and u(t) is the control variable The system is

1.  controllable and state

2.  controllable but stable

3.  uncontrollable and unstable

4.  uncontrollable but stable

4

controllable but stable

Explanation :
No Explanation available for this question

# The transfer function for the state variable representation X = AX + Bu, Y = CX + Du, is given by

1.  D + C(sI - A)-1 B

2.  B(sI - A)-1C + D

3.  D(sI - A)-1,B + C

4.  C(sI - A)-1D + B

4

D + C(sI - A)-1 B

Explanation :
No Explanation available for this question

# In the feedback system shown in the given figure, the noise component of output is given by (assume high loop gain at frequency of interest)

1.  -N(s)/H1(s)

2.  N(s)/H1(s)

3.  N(s)/H1(s)H2(s)

4.  -N(s)/H1(s)H2(s)

4