Power Systems A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage? 40 kV 32 kV 36 kV 45 kV 40 kV 32 kV 36 kV 45 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 60 Hz, 320 Km loss less line has sending end voltage 1.0 pu. The receiving end voltage on no-load is none of these. 1.088 pu. 1.116 pu. 1.1 pu. none of these. 1.088 pu. 1.116 pu. 1.1 pu. ANSWER DOWNLOAD EXAMIANS APP
Power Systems 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 159.24 m/s 0.0312 m/s 159.24 m/µs 32 m/s 159.24 m/s 0.0312 m/s 159.24 m/µs 32 m/s ANSWER DOWNLOAD EXAMIANS APP
Power Systems To reduce the radio interference which line is/are transposed? Power line Both power and telecommunication lines either 1 or 2 None of these Power line Both power and telecommunication lines either 1 or 2 None of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal power plant is being supplied with coal having much more ash content than that for which it was designed. Which of its following units needs major modifications Cooling tower. Pulversing unit. Ash handling unit. Condenser. Cooling tower. Pulversing unit. Ash handling unit. Condenser. ANSWER DOWNLOAD EXAMIANS APP
Power Systems When a neutral point of 3 - Φ system is directly connected to earth then it has what type of grounding? Reactance. Peterson coil. Resistance. Solid. Reactance. Peterson coil. Resistance. Solid. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS