Month: February 2020

Q.161 A 4 pole, 50 Hz induction motor has a rotor resistance of 0.3 Ω and standstill reactance of 1.2 Ω. What is the value of speed at maximum torque? A. 1100 rpm B. 1025 rpm C. 1125 rpm D. Read More …

Q.146 The best location of the power factor correction equipment to be installed in the transmission line is at A. the sending end B. any place C. the receiving end D. middle of the line Ans.: C Q.147 The efficiency Read More …

Q.131 Transposition of transmission line is done to A. reduce skin effect B. reduce line loss C. reduce corona D. balance line voltage drop Ans.: D Q.132 Rated making capacity of a circuit breaker is equal to A. √2 x Read More …

Q.116 If the percentage reactance of the system upto the point of fault is 20% and the base KVA is 10000 the short circuit KVA is A. 10 MVA B. 20MVA C. 50 MVA D. 60 MVA Ans.: C Q.117 Read More …

Q.101 Due to skin effect A. current flows through the half cross section of the conductor B. portion of the conductor near the surface carries less current and the core of the conductor carries more current C. portion of the Read More …