This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Miscellaneous”. 1. Solid State Relays (SSRs) have a a) coil and contact arrangement b) optocoupler c) scr d) none of the mentioned 2. The converter circuit which employs turn on and turn off when the voltage and/or current through the device is … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Applications of Power Electronics-2”. 1. HVDC transmission lines are __________ as compared to HVAC lines. a) difficult to erect b) more expensive for long distances c) more expensive for short distances d) less expensive for short distances 2. In HVDC transmission lines … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Applications of Power Electronics-1”. 1. SMPS is used for a) obtaining controlled ac power supply b) obtaining controlled dc power supply c) storage of dc power d) switch from one source to another 2. SPMS are based on the ________ principle. a) … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Cycloconverters”. 1. A cycloconverter is a _________ a) one stage power converter b) one stage voltage converter c) one stage frequency converter d) none of the mentioned 2. Applications of cycloconverters include a) speed control of ac drives b) induction heating c) … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Sequence Controller”. 1. Sequence control of ac voltage controllers is employed for the improvement of _________ a) output frequency b) input frequency c) commutation d) system power factor 2. A two stage sequence control is a) two SCRs in anti parallel b) … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “AC Voltage Controllers-3”. 1. The below given circuit has Vs = 230V and R = 20 Ω. Find the value of the average output voltage at the R load for a firing angle of 45°. a) 224 V b) -15.17 V c) … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “AC Voltage Controllers-2”. 1. In the below shown circuit, the diode conducts for a) 90° b) > 90° c) < 90° d) 0° 2. The SCR T1 is fired at an angle of α, and the supply Vs = Vm sinωt. Find … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “AC Voltage Controllers-1”. 1. AC voltage controllers convert a) fixed ac to fixed dc b) variable ac to variable dc c) fixed ac to variable ac d) variable ac to fixed ac 2. In AC voltage controllers the a) variable ac with … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Current Source Inverters”. 1. In voltage source inverters (VSIs), the amplitude of the output voltage is a) independent of the load b) dependent on the load c) dependent only on L loads d) none of the mentioned 2. In voltage source inverters … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Harmonic Reduction”. 1. Which of the following is used as a harmonic reduction technique in inverters? a) Amplitude modulation b) Cycloconverter control c) Transformer connection d) Series connection of two inverters 2. For harmonic reduction by transformer connection, the output voltages from … Read more
