Match the following

Bus Type - Known Parameter - Unknown Parameter
Load Bus -P, Q - V, phase angle
Generator Bus - P, V (magnitude) - Q, Voltage phase angle
Slack Bus Voltage - magnitude and phase angle - P, Q

The air envelope surrounding the earth is called ___

The Prime Minister Rozgar Yojana (PMRY) was launched in which year?

Calculate the capacitance per meter of a 50 Ω load cable that has an inductance of 50 nH/m.

Z = √(L/C)
C = L/Z²
C = 50*10⁻⁹/(50*50)
C = 0.02 nF
C = 20 pF

At what range of wind speed is the electricity from the wind turbine is generated?

For small turbine starts generating power 12.6 kph (3.5 m/s) is the typical cut-in speed.
At 36–54 kph (10–15 m/s) produces maximum generation power.
At 90 kph (25 m/s) maximum, the turbine is stopped or braked.

Simultaneous tripping of the circuit breaker at both ends of a transmission line is achieved by

Carrier current over the power line provides simultaneous tripping of circuit breakers at both ends of the line in one to three cycles.
Thereby high-speed fault clearing is obtained, which improves the power system stability.
The auto-reclosing simultaneous reclosing signal is sent thereby simultaneous (1 to 3 cycles) reclosing of the circuit breaker is obtained.
For simultaneous faults, carrier-current protection provides easy discrimination.

As per answer key "pilot protection" is true but there is mistake the right answer is "none".