Electrical Engineering · Question Bank

Transmission Lines

17 of 168 questions match. Answer in your head first, then check the solution.

📘 EE Mock Board Exam
TypeAll 97Problem solving 17Objective 80
DifficultyAll 88Easy 17Medium 38Hard 33
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#1📘 1001 RojasEasy
A single solid round copper wire has a diameter of 0.50 inch. Determine its self GMD.
A0.3894 inch
B0.1947 inch
C0.1825 inch
D0.25 inch
#2📘 1001 RojasEasy
Determine the mutual GMD of a three-phase single-circuit transmission line whose conductors arranged in a triangular formation so that the two distances between conductors are 20 ft and the third is 38 ft, respectively?
A24.77 ft
B25.35 ft
C23.67 ft
D26.43 ft
#3📘 1001 RojasEasy
A single-phase transmission line 15 km long is using copper conductors of diameter 0.8 cm. If the distance between conductors is 1.25 m, determine the self-inductance of the transmission lines.
A0.036 H
B0.024 H
C0.072 H
D0.055 H
#4📜 EE Pre-Board August 2012📘 PowerhouseEasy
A 100 km transmission line has a 1000 ohms shunt capacitive reactance. What is the capacitive reactance per km?
A1,000 Ω
B10 Ω
C100,000 Ω
D100 Ω
#5📜 EE Pre-Board March 2013📘 PowerhouseEasy
What is the equivalent of the constant C in the ABCD constants for the nominal-T circuit of a transmission line for which R = 10 Ω, \(X_L\) = 20 Ω and Y = 400 μS for each phase?
A\(0.996\angle 0.115^\circ\)
B\(22.25\angle 63.45^\circ\)
C10 + j20
D\(4 \times 10^{-4}\angle 90^\circ\)
#6📜 EE Pre-Board August 2013📘 PowerhouseEasy
A string insulator has 4 units. The voltage across the bottom most unit is 30% of the total voltage. What is the string efficiency?
A30%
B60%
C75%
D83.33%
#7📜 EE Pre-Board March 2015📘 PowerhouseEasy
A string insulator has 5 units. The voltage across the bottom most until is 30% of the total voltage. What is the string efficiency?
A60%
B66.67%
C75%
D83.33%
#8📜 EE Pre-Board March 2015📘 PowerhouseEasy
The capacitance reactance of a transmission line is 90,000 ohms per kilometer. Find the total capacitance reactance if the transmission line is 50 km long.
A90,000 Ω
B\(4.5 \times 10^{6}\) Ω
C180,000 Ω
D1,800 Ω
#9📜 EE Pre-Board August 2015📘 PowerhouseEasy
A string insulator has 5 units. The voltage across the bottom most unit is 25% of the total voltage. What is the string efficiency?
A80%
B75%
C67%
D86%
#10📜 EE Pre-Board August 2015📘 PowerhouseEasy
The capacitive reactance of a transmission line is 90,000 ohms per kilometer. Find the total capacitive reactance if the transmission line is 60 km long.
A\(5.4 \times 10^{6}\) Ω
B1,500 Ω
C90,000 Ω
D180,000 Ω
#11📜 EE Pre-Board March 2016📘 PowerhouseEasy
Determine the total inductance of a single-phase overhead transmission line 10 km long. The diameter of each conductor is 0.8 cm and the distance between them is 1.2 meters.
A11.9 mH
B23.8 mH
C35.7 mH
D47.6 mH
#12📜 EE Pre-Board March 2016📘 PowerhouseEasy
A 100 km transmission line has a 1,000 ohms shunt reactance. What is the per km shunt reactance?
A1,000 Ω
B100,000 Ω
C10 Ω
D100 Ω
#13📜 EE Pre-Board March 2017📘 PowerhouseEasy
A string insulator has 6 units. The voltage across the bottom most unit is 20% of the total voltage. Its string efficiency is
A20%
B60%
C75%
D83.3%
#14📜 EE Pre-Board August 2017📘 PowerhouseEasy
A 100-km transmission line has a 1,200 Ω shunt reactance. What is the per km shunt reactance?
A12 Ω
B120,000 Ω
C1,200 Ω
D120 Ω
#15📜 EE Pre-Board March 2018📘 PowerhouseEasy
The capacitive reactance of a transmission line is 90,000 ohms per kilometer. Find the total capacitive reactance if the transmission line is 50-km long.
A\(4.5 \times 10^{6}\) Ω
B1,800 Ω
C90,000 Ω
D180,000 Ω
#16📜 EE Pre-Board March 2018📘 PowerhouseEasy
In a 3 core cable, the capacitance between two conductors is 3 μF. What will be the capacitance per phase?
A1.5 μF
B3 μF
C6 μF
D12 μF
#17📜 EE Pre-Board March 2018📘 PowerhouseEasy
A 100 km transmission line has a 1,200 ohms shunt reactance. What is the shunt reactance per km?
A1,200 Ω
B120,000 Ω
C12 Ω
D120 Ω

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