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AE 2019 || Day 13 || Power Systems Quiz 1
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Question 1
Consider the following statements regarding corona:
1) It causes radio interference
2) It attenuatres lightning surges.
3) It causes power loss.
4) It is more prevalent in the middle conductor of a transmission line employing flat conductor configuration.
Which of the above statements are correct?
1) It causes radio interference
2) It attenuatres lightning surges.
3) It causes power loss.
4) It is more prevalent in the middle conductor of a transmission line employing flat conductor configuration.
Which of the above statements are correct?
Question 2
Two networks are connected in cascade in the figure. The equivalent ABCD constants are obtained for the combiend network having C = 0.1∠90°
What is the value of z2?
What is the value of z2?
Question 3
Two generating stations connected to a load centre having capacity of 50 MVA and 75 MVA deliver 100 MVA to the load. The incremental cost of plant 1 is 15 + 0.15 P1 and that of the plant 2 is 18 + 0.15 P2. What are the values of P1 and P2, respectively?
Question 4
The positive, Negative and Zeroes sequence per unit impedances of two generators connected in parallel are X1=0.12 p.u. , X2 = 0.096 p.u. and X0=0.036 p.u.. For a L-G fault at generator terminals (with 1 pu voltage) the positive sequence current will be
Question 5
An alternator having an induced e.m.f. of 1.6 p.u. is connected to an infinite bus of 1.0 p,u. if the bus bar has reactance of 0.6 p.u. and alternator has reactance of 0.2 p.u., what is the maximum power that can be transferred?
Question 6
A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitaqnce per phase are: 10 mH and 0.2 mF, respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero?
Question 7
High voltage d.c. transmission requires filters for
Question 8
A long overhead lossless power transmission line is terminated with its characteristic impedance. While the line is in operation
Question 9
A sample power system network is shown in the figure given below. The reactance marked are in p.u. What is the pu value of Y22 of the Bus Admittance matrix (YBUS) ?
Question 10
Consider the following statements in respect of load flow studies in power systems:
1) Bus admittance matrix is a sparse matrix
2) Gauss-Seidel method is preferred over Newton-Raphson method for load flow studies
3) one of the buses is taken as slack bus in load flow studies
Which of these statements are correct?
1) Bus admittance matrix is a sparse matrix
2) Gauss-Seidel method is preferred over Newton-Raphson method for load flow studies
3) one of the buses is taken as slack bus in load flow studies
Which of these statements are correct?
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ESE & GATE EEGeneralApr 5ESE & GATE EE
