A string insulator has 4 units. The voltage across the bottom most unit is 33.33% of total voltage. Its string efficiency is 75% 66.66% 33.33% 25% TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statement is/are true regarding infinite line? It maintains the constant voltage It has infinite voltage both 2 and 3 It has infinite length TRUE ANSWER : ? YOUR ANSWER : ?
The corona loss on a particular system at 60 Hz is 1 kW/km per phase. What is the corona loss at 50 Hz in kW/km per phase? 0.93 1.13 1 0.882 TRUE ANSWER : ? YOUR ANSWER : ?
Deflectors are provided in Pelton wheel. propeller turbine. Kaplan turbine. Francis turbine. TRUE ANSWER : ? YOUR ANSWER : ?
The SWR on a lossless transmission line of the characteristic impedance 100 ohm is 3. The line is the terminated by A resistance of 100 ohm. A resistance of 100/3 ohm. A resistance of j300 ohm. A resistance of j100/3 ohm. TRUE ANSWER : ? YOUR ANSWER : ?
A CT is connected in ___________________ with the line. not connected. series. across. both A and B. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is/are the disadvantages of phase modifiers? Initial cost of synchronous phase modifier is higher It consumes both active and reactive power All of these It requires more maintenance because of running equipment TRUE ANSWER : ? YOUR ANSWER : ?
A cable has the following characteristics, L = 0.201 µH/m and C = 196.2 pF/m. The velocity of wave propagation through cable is 32 m/s 159.24 m/s 159.24 m/µs 0.0312 m/s TRUE ANSWER : ? YOUR ANSWER : ?
The specific speed of water turbine is the speed at which the turbine develops maximum horse power. unit horse power at all heads. a minimum horse power. unit horse power at unit head. TRUE ANSWER : ? YOUR ANSWER : ?
Objectives of power system is/are nether 1 nor 2 Rated voltage and frequency has to be supplied to the consumers both 1 and 2 Cost of electrical energy per KWh is to be minimum TRUE ANSWER : ? YOUR ANSWER : ?