# The incremental fuel cost for 2 generating units are given by Ic1 = 25 + 0.2PG1             Ic2 = 32 + 0.2PG2 Where PG1 and PG2 are real power generated by the units. The economy allocation for the total load of 250 MW, neglecting transmission loss is given by

1.  PG1 = 140.25 MW    PG2 = 109.75 MW

2.  PG1 = 109.75 MW    PG2 = 140.25 MW

3.  PG1 = 125 MW    PG2 = 125 MW

4.  PG1 = 100 MW    PG2 = 150 MW

4

PG= 140.25 MW    PG= 109.75 MW

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+0.3P1, IC2=32+0.4P2, IC3=30 where 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=157.14MW, P2=242.86MW, and P3=300 MW

3.  P1=300 MW, P2=300 MW, and P3=100 MW

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

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 totoal load of 80 MW. Machine 1: 40 MVA with 5% speed regulation Machine 2: 60 MVA with 5 % speed regulation The load sharing between machines 1 and 2 wil be

1.  P1/48MW   P2/32 MW

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 incremental generating costs of two generating units are given by Ic1=0.1X+20 Rs/MWhr Ic2=0.15 Y+18 Rs/MWhr Where X and Y are power( in MW) generated by the two units. For a total demand of 300 MW. The values (in MW) of X and Y will be respectively

1.  172 and 128

2.    128 and 172

3.  175 and 125

4.    200 and 100

4

172 and 128

Explanation :
No Explanation available for this question

# The power generated by two plants are: P1=50 MW, P2=40 MW. If the loss coefficients are B11=0.01, B22=0.0025 and B12=-0.0005. Then the power loss will be

1.  5.5 MW

2.   6.5 MW

3.  4.5 MW

4.   8.5 MW

4

5.5 MW

Explanation :
No Explanation available for this question

# A 3-pahse supply, 5 KW induction motor has a power factor 0.75 lagging. A bank of capacitors is connected in delta across the supply terminals and power factor raised to 0.9 lagging. KVAR rating of the capacitors connected in each phase will be

1.  0.66 KVAR

2.   0.6 KVAR

3.     1.21 KVAR

4.  none of these

4

0.66 KVAR

Explanation :
No Explanation available for this question

# A power system has two generating plants and the power is being dispatched economically with P1=125 MW and P2=250 MW. The loss coefficients are B11=0.1X102 MW-1, B12=-0.01X10-2 MW-1 , B22=0.13X10-2 MW-1  to raise the total load on the system by 1 MW will cost an additional 200 Rs per hour. The penalty factor for plant  1 will be

1.  1.51

2.      1.18

3.    1.37

4.      1.25

4

1.25

Explanation :
No Explanation available for this question

# An industrial consumer has a connected load of 100 KW. The maximum demand is 80 KW. On an average each machine works for 8 hours a day for 300 working days in a year. If tariff is Rs 5000+Rs 800 per KW of maximum demand +Rs 1.15 per KWH of energy consumed, the annual bill of the consumer will be

1.  Rs 350000

2.  Rs 400,000

3.   Rs 250,000

4.      Rs 34500

4

Rs 34500

Explanation :
No Explanation available for this question

# For an unbalanced fault, with paths for zero sequence currents, at the point of fault

1.  Negative and zero sequence voltages are minimum

2.  Negative and zero sequence voltages are maximum

3.  Negative sequence voltage is minimum and zero sequence voltage is maximum

4.  Negative sequence voltage is maximum and voltage is minimum

4

Negative and zero sequence voltages are maximum

Explanation :
No Explanation available for this question

# For a fault at the terminals of a synchronous generator the fault current is maximum for a

1.  3-phase fault

2.  3-phase to ground fault

3.  Line to ground fault

4.  Line to line fault

4