Electrical Engineering · Question Bank

Transmission Lines

80 of 168 questions match · page 1 of 4. Answer in your head first, then check the solution.

📘 EE Mock Board Exam
TypeAll 168Problem solving 88Objective 80
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#1📜 EE Pre-Board August 2012📘 PowerhouseEasy
Skin effect is proportional to
A(diameter of conductor)²
Bdiameter of conductor
C(diameter of conductor)³
D\((\text{diameter of conductor})^{1/2}\)
#2📜 EE Pre-Board August 2012📘 PowerhouseEasy
This device is used to reflect back surges into the line.
ADeion gaps
BOverhead Ground
CChoke Coil
DArc Horns
#3📜 EE Pre-Board August 2012📘 PowerhouseEasy
Porcelain insulators are protected against creepage of surge current by the use of _.
ASurge gaps
BArcing Horns
CGround Conductors
Dsurge arrester
#4📜 EE Pre-Board August 2012📘 PowerhouseEasy
In what year was the first 500 kV line in the world became operational?
A1936
B1953
C1965
D1969
#5📜 EE Pre-Board March 2013📘 PowerhouseEasy
In transmission voltage levels, 765kV is categorized as
AHigh Voltage
BExtra High Voltage
CUltra High Voltage
DMedium Voltage
#6📜 EE Pre-Board March 2013📘 PowerhouseEasy
Surge impedance of transmission line is given by
A\(\sqrt{C/L}\)
B\(\sqrt{CL}\)
C\(\sqrt{L/C}\)
D\(1/\sqrt{LC}\)
#7📜 EE Pre-Board August 2013📘 PowerhouseEasy
Bundled conductors in EHZ transmission lines results to
Areduce capacitance
Bincrease inductance
Cincrease capacitance
Dincrease resistance
#8📜 EE Pre-Board August 2013📘 PowerhouseEasy
The surge impedance of an underground cable is around
A50 Ω
B2 Ω
C400Ω
D100 Ω
#9📜 EE Pre-Board August 2013📘 PowerhouseEasy
This is the porcelain insulator for the end poles;
Apin
Bpost
Csuspension
Dakimbo.
#10📜 EE Pre-Board March 2014📘 PowerhouseEasy
34.5 kV to 69 kV is classified as
Alow voltage
Bmedium voltage
Chigh voltage
Dextra high voltage
#11📜 EE Pre-Board March 2014📘 PowerhouseEasy
Surge impedance of transmission line is given by
A\(\sqrt{C/L}\)
B\(\sqrt{CL}\)
C\(1/\sqrt{CL}\)
D\(\sqrt{L/C}\)
#12📜 EE Pre-Board August 2014📘 PowerhouseEasy
This device function is used to reflect back surgest into the line.
AChoke coil
BArc horns
CSurge depressors
DDelon gaps
#13📜 EE Pre-Board August 2014📘 PowerhouseEasy
Transmission voltage level of 1,000kV is categorized as
ALow Voltage
BHigh Voltage
CExtra High Voltage
DUltra High Voltage
#14📜 EE Pre-Board August 2014📘 PowerhouseEasy
Surge impedance of transmission line is given by
A\(\sqrt{C/L}\)
B\(\sqrt{CL}\)
C\(1/\sqrt{LC}\)
D\(\sqrt{L/C}\)
#15📜 EE Pre-Board March 2016📘 PowerhouseEasy
The surge impedance of a transmission line is given by
A\(\sqrt{C/L}\)
B\(\sqrt{LC}\)
C\(1/\sqrt{LC}\)
D\(\sqrt{L/C}\)
#16📜 EE Pre-Board March 2017📘 PowerhouseEasy
In a long transmission line at no load, the receiving end voltage as compared to the sending end voltage is (I) higher, (II) lower, (III) the same.
AI only
BII only
CEither I or II
DIII only
#17📜 EE Pre-Board March 2017📘 PowerhouseEasy
A distributor is designed from the point of view of
Avoltage drop
Bcurrent carrying capacity
Cvoltage drop and current
Dload capacity
#18📜 EE Pre-Board March 2017📘 PowerhouseEasy
The presence of an earth in case of overhead lines
Aincreases the capacitance
Bdecreases the capacitance
Cincreases the inductance
Ddecreases the inductance
#19📜 EE Pre-Board March 2017📘 PowerhouseEasy
What is the empirical formula to calculate the number of strands?
A3n(n + 2n) + 2
B3n(n + 1) + 2
C3n(n + 1) + 1
D3n(3 + 3n) + 1
#20📜 EE Pre-Board March 2017📘 PowerhouseEasy
When bundled conductors are used in transmission lines, the effective capacitance and inductance will respectively
Adecrease and increase
Bincrease and decrease
Cremain same and increase
Ddecrease and remain same

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