MCQ No - 1. Current in the circuit is A. ANSWER: Choose An Item. 2. The key difference between working out power for 3-phase and single-phase systems is a factor of the square root of three. Mostly active B. In three-phase full wave rectifier, six diodes are used. If α is the angle of voltage wave at which an R-L circuit is switched in and Θ is the impedance angle of the R-L circuit, there will be no transient when the circuit is … 365 C. 370 D. 375 Answer: B 1. 1. Each coil generates 120 V ac. The wattmeter method is used to measure power in a three-phase load. How much current flows through the common neutral line? View MCQ_three phase.docx from IT 69 at Fr. The load impedances across phases a-b, b-c, and c-a are purely resistive as follows: Rab = 60Ω, Rbc = 90 Ω, Rca = ∞ (i.e, open circuit). Mostly Reactive C. Both active and reactive power are equal D. None of the above . The Following Section consists Multiple Choice Questions on Three-Phase Systems in Power Applications. In this, each diode conducts for 1/6 th part of the AC cycle. A common neutral line exists. ... 19. A. 360 B. P B) PActive = 3 XELINEX JLINE C) PActive =ELINEX JLINE\cos 0 D) Depends On The Load Connection. … In case of 3 phase short circuit in a system, the power fed into the system is A. Circuit Breaker Multiple Choice Questions It is also called 6-diode half-wave rectifier. 16. Learn Three Phase Systems In Power Applications MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. If the power factor is zero, the active recovery voltage will be (a) minimum (b) 0.5 (c) 0.707 (d) maximum. Power in a Three Phase Circuit = _. The wattmeter readings are 400W and -35W. Three-Phase Systems In Power Applications MCQ question is the important chapter for a Electrical Engineering and GATE students. 3. The power consumed in a circuit element will be least when the phase difference between the current and voltage is Take the Quiz and improve your overall Engineering. Next . Performing a 3-phase power calculation means using a simple formula relating the power to the voltage, current and a power factor describing the efficiency of the circuit. MCQs of Symmetrical Three-Phase Faults. Q.9 A single-phase sinusoidal voltage of 120 V is connected to a 90 load. Conceicao Rodrigues College of Engineering. The Formula For The Total Active Power In Three-phase Balanced Circuit Is: A) Pastive =ELINEⓇ LLINExp.f. 13.3 mA B. BEE: Sem I MCQ’s on Three phase circuits Date: / / Div: Roll no: Q1. Consider the three-phase 3-wire load that is supplied by a balanced positive-sequence source where the rms values of phase voltages are equal to 120 V, with phase “a” voltage is taken as a reference. Network Theory Multiple Choice Questions & Answers on “Power Measurement in Three-Phase Circuits”. 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