Power Systems In hydroelectric power plants both operating and initial cost are low. both operating and initial cost are high. operating cost is high and initial cost is low. operating cost is low and initial cost is high. both operating and initial cost are low. both operating and initial cost are high. operating cost is high and initial cost is low. operating cost is low and initial cost is high. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base? 5 pu 0.2 pu 1 pu 0.25 pu 5 pu 0.2 pu 1 pu 0.25 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)? 3 × 106 kV / sec. 3.5 × 106 kV / sec. 2 × 106 kV / sec. 1 × 106 kV / sec. 3 × 106 kV / sec. 3.5 × 106 kV / sec. 2 × 106 kV / sec. 1 × 106 kV / sec. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠°90 Ω, C = 0.5*10^-6∠90° ℧. Find Charging current under no load? 0.512∠90° A/phase 1.144∠90° A/phase 0.344∠90° A/phase 0.144∠90° A/phase 0.512∠90° A/phase 1.144∠90° A/phase 0.344∠90° A/phase 0.144∠90° A/phase ANSWER DOWNLOAD EXAMIANS APP
Power Systems Reheat cycle in thermal power plant is used to improve condenser performance. increase thermal efficiency. reduce loss of heat. utilize heat of flue gases. improve condenser performance. increase thermal efficiency. reduce loss of heat. utilize heat of flue gases. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The radiation shield for a nuclear power reactor for biological safety is provided by having the reactor immersed in water pool. encased by thick concrete wall. isolated from outside word with strong magnetic field. encased thick metal wall. immersed in water pool. encased by thick concrete wall. isolated from outside word with strong magnetic field. encased thick metal wall. ANSWER DOWNLOAD EXAMIANS APP
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