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Vizag Steel Re-Exam: Quiz 3
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Question 1
The voltage stress will be maximum in an underground cable at
Question 2
The positive sequence current of a transmission line is
Question 3
What is the approximate value of the surge impedance loading of a 400kV , 3-phase 50Hz overhead single circuit transmission line
Question 4
A 3-phase transformer rated for 33 kV/11 kV is connected in delta/star as shown in figure. The current transformers (CTs) on low and high voltage sides have a ratio of 500/5. Find the currents i1 and i2, if the fault current is 300 A as shown in figure. 
Question 5
Consider the following statements regarding HVDC power transmission:
1) The modern HVDC systems use 12-pulse converters.
2) DC systems never use ground or sea return.
3) Most of present-day d.c. schemes are two-terminal links.
Which of these statements is/are correct?
1) The modern HVDC systems use 12-pulse converters.
2) DC systems never use ground or sea return.
3) Most of present-day d.c. schemes are two-terminal links.
Which of these statements is/are correct?
Question 6
Assertion (A): Bus admittance matrix is a sparse matrix.
Reason (R): In load flow studies, one of the buses is taken as a slack bus.
Reason (R): In load flow studies, one of the buses is taken as a slack bus.
Question 7
What is the approximate value of the surge impedance loading of a 400 kV, 3-phase 50 Hz overhead single circuit transmission line?
Question 8
Why is a ring main distribution system preferred to a radial system?
1) Voltage drop in the feeder is less.
2) Power factor is higher.
3) Supply is more reliable
1) Voltage drop in the feeder is less.
2) Power factor is higher.
3) Supply is more reliable
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Sep 7ESE & GATE EE
