Parameters of single and three phase TL with single circuits

What is the unit of measurement for resistance in a transmission line?

• A. Amps
• B. Volts
• C. Ohms
• D. Watts

Which type of parameter represents the opposition of a transmission line to the flow of alternating current due to the inductive effect?

• A. Resistance
• B. Reactance
• C. Inductance
• D. Capacitance

Why is surge impedance important in transmission lines?

• A. It determines the capacitance of the line.
• B. It determines the voltage drop across the line.
• C. It determines the efficiency of power transmission.
• D. It determines the maximum power that can be transmitted through the line.

How does increasing the power factor affect the transmission line's voltage drop?

• A. It increases the voltage drop.
• B. It decreases the voltage drop.
• C. It has no effect on the voltage drop.
• D. It depends on the type of line.

If a transmission line has a resistance of 0.5 ohms per km and a reactance of 0.2 ohms per km, what is the impedance of a 50 km section of the line?

• A. 7.5 ohms
• B. 12.5 ohms
• C. 15 ohms
• D. 25 ohms

A 3-phase transmission line has a voltage drop of 100V and a current of 50A. What is the power being lost in the line?

• A. 5000 W
• B. 2500 W
• C. 500 W
• D. 250 W

If a transmission line has a resistance of 0.4 ohms and a reactance of 0.6 ohms, what is the power factor of the line?

• A. 0.5
• B. 0.6
• C. 0.8
• D. 0.9

A 100 km transmission line has a surge impedance of 500 ohms. What is the maximum power that can be transmitted through the line?

• A. 5 MW
• B. 50 MW
• C. 100 MW
• D. 200 MW

Evaluate the impact of increasing the line capacitance on the transmission line's surge impedance.

• A. It increases the surge impedance.
• B. It decreases the surge impedance.
• C. It has no effect on the surge impedance.
• D. It depends on the type of line.