Short Transmission Lines - MCQs with AnswersQ1. On what concept is electrically short, medium and long lines based on?
a. Nominal voltage of the line.
b. Physical length of the line.
c. Wavelength of the line.
d. Power transmitted over the line.View Answer / Hide Answer
Q2. The capacitance effect can be neglected in which among the transmission lines?
ANSWER: b. Physical length of the line.
a. Short transmission lines.
b. Medium transmission lines.
c. Long transmission lines.
d. All of these.View Answer / Hide Answer
Q3. In the modelling of short length overhead transmission line, why is the line capacitance to ground not considered?
ANSWER: a. Short transmission lines.
a. Equal to zero.
b. Finite but very small.
c. Finite but very large.
d. Infinite.View Answer / Hide Answer
Q4. In a short transmission line, voltage regulation is zero when the power factor angle of the load at the receiving end side is equal to ____________.
ANSWER: b. Finite but very small.
(R/Z)View Answer / Hide AnswerQ5. What is the power factor angle of the load for maximum voltage regulation?
(R/X)View Answer / Hide AnswerQ6. A single phase transmission line of impedance j0.8 ohm supplies a resistive load of 500 A at 300 V. The sending end power factor is
b. 0.8 lagging
c. 0.8 leading
d. 0.6 laggingView Answer / Hide AnswerQ7. For a short line if the receiving end voltage is equal to sending end voltage under loaded conditions
a. The sending end power factor is unity.
b. The receiving end power factor is unity.
c. The sending end power factor is leading.
d. The receiving end power factor is leading.View Answer / Hide Answer
Q8. What is the line length if a load of 15000 kW at a power factor 0.8 lagging can be delivered by a 3 phase transmission line having conductors each of resistance 1 Ω per kilometre? The voltage at the receiving end is to be 132kV and the loss is about 5%.
ANSWER: d. The receiving end power factor is leading.
d. 35.87kmView Answer / Hide Answer