# A 100 kVA transformer has 4% impedance. and 50kVA transforiner has 3% impedance when they are operated in parallel, which transformer will reach full load first

1.  3%

2.  4%

3.  data is insufficient

4.  none of these

4

3\%

Explanation :
No Explanation available for this question

# A synchronous generator connected to infinite bus delivers power at a log p.f. If its excitation is increased

1.  the terminal voltage increases

2.  Voltage angle S increases

3.  Current deliverted increased

4.   both (b) and (c)

4

both (b) and (c)

Explanation :
No Explanation available for this question

# The system matrix of a continuous-time system describe in the state variable form is A= The system is stable for all values of x and y satisfying

1.  x

2.  x>1/2,y>1/2

3.  x

4.  x

4

x<0,y<2

Explanation :
No Explanation available for this question

# The incremental cost characteristics of two generators delivering 200 MW are as follows : dF1/dP1= 2.0 + 0.01 P1 dF2/dP2= 1.6 + 0.2 P2 For economic operation, the generations P1 and P2 should be

1.  P1= P2 = 100 MW

2.  P1 = 80 MW, P2 = 120 MW

3.  P1 = 200 MW, P2 = 0 MW

4.  P1 = 120 MW, P2 = 80 MW

4

P1 = 120 MW, P2 = 80 MW

Explanation :
No Explanation available for this question

# Consider the closed loop system shown in the give figure The state model of the system is

1.  =+u,y=[1 0]

1

Explanation :
No Explanation available for this question

# Incremental fuel costs (in some appropriate unit)for a power plant consisting of three generating units are IC1 = 20 + 0.3 P1, IC2 = 32 + 0.4P2,IC3 = 30where P1 is the power in MW generated by unit i, for i=1, 2 and 3. Assume that all the three units are operating all the time. Minimum and maximum loads on each unit are 50 MW and 300 MW respectively If the plant is operating on economic load dispatch to supply the total power generated by each unit is

1.  P1 = 242.86 MW;P2 = 157.14.MW; and P3 =300 MW

2.  P1 = 157.14 MW;P2 = 242.86 MW; and P3 = 300 MW

3.  P1 = 300.0 MW;P2 = 300.0 MW; and P3 = 100

4.   P1 = 233.3 MW;P2= 233.3 MW; and P3 = 233.4

4

P1 = 242.86 MW;P2 = 157.14.MW; and P3 =300 MW

Explanation :
No Explanation available for this question

# The following data pertain to two alternators working in parallel and supplying a total load of 80 MW Machine 1 : 40 MVA with 5% speed regulation Machine 2 : 601VIVAWith 5% speed regulation . The load sharing between machines ..1 and 2 will be

1.  P1/ 48MW P2/32MW

2.  40 MW 40 MW

3.  30 MW 50 MW

4.   32 MW 48 MW

4

30 MW 50 MW

Explanation :
No Explanation available for this question

# The minimum number of state necessary to describe the network shown in the figure in a state variable form is

1.  2

2.  3

3.  4

4.  6

4

3

Explanation :
No Explanation available for this question

# Consider the following statements regarding a linear system y=f(x1) 1.f(x1+x2)=f(x1)+f(x2) 2.f[x(t+T)]=f[x(t)+f[x(T)] 3.f(Kx)=Kf(x) Of these statements

1.  1,2 and 3 are correct

2.  1 and 2 are correct

3.  3 alone is correct

4.  1 and 3 are correct

4

1 and 3 are correct

Explanation :
No Explanation available for this question

1.  0.1 / 1500

2.  60 / 1500

3.  6 / 1500

4.   60 / 150

4