The incremental fuel cost for two 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 economic allocation for a 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=PG2=125 MW

4.  PG1= 100 MW, PG2=150 MW

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4
Correct Answer :

PG1=140.25, MW, PG2=109.75 MW


Explanation :
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For the field controlled dc servomotor shown in the figure, the transfer function θ(s)/ E (s) Contains

1.  two time constants, no integration

2.  two time constants, one integration

3.  one time constant one integration

4.  one time constant two integration

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4
Correct Answer :

two time constants, one integration


Explanation :
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The incremental generating costs of two generating units are given by Ic1= 0.1 X + 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

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4
Correct Answer :

172 and 128


Explanation :
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Consider a system shown in the given figure If the system is disturbed so that C(0) = 1, then c(t) for a unit step input will be

1.  1+t

2.  1-t

3.  1+2t

4.  1-2t

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4
Correct Answer :

1+2t


Explanation :
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The overshoot of the system 16K/s(s2+2s+16)for a step input applied would be

1.  60%

2.  40%

3.  20%

4.  10%

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4
Correct Answer :

40\%


Explanation :
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The power generated by two plants are  P1=50 MW, P2= 40 MW. If the loss coefficients are B11= 0.001, 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

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4
Correct Answer :

5.5 MW


Explanation :
No Explanation available for this question

The position and acceleration error coefficients for the open-loop transfer function G(s) =K/s2(S + 10)(S + 100) respectively are

1.  zero and infinity

2.  infinity and zero

3.  K/100 and zero

4.  infinity and K/1000

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4
Correct Answer :

infinity and K/1000


Explanation :
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If the unit step response of a system is a unit impulse function, then transfer function of such a system will be

1.  1

2.  1/s

3.  s

4.  1/s2

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4
Correct Answer :

s


Explanation :
No Explanation available for this question

The plant supplies a load of 400 MW. The economic load scheduling of the two units will be

1.  P1 = 266.6 MW, P2= 133.4 MW

2.  P1=250 MW P2 = 150 MW

3.  P1= 133.4 MW, P2 = 266.6 MW

4.  P1=125MW,P2=75MW

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4
Correct Answer :

P1 = 266.6 MW, P2= 133.4 MW


Explanation :
No Explanation available for this question

Consider a system with the transfer function G(s) =s + 6/Ks2+s+6 Its damping ratio will be 0.5 when the value of K is

1.  2/6

2.  3

3.  1/6

4.  6

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4
Correct Answer :

1/6


Explanation :
No Explanation available for this question
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