100 TOP RECTIFIERS Questions and Answers pdf RECTIFIERS Questions.pdf

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  Home  » RECTIFIERS Questions  » 100 TOP RECTIFIERSQuestions and Answers pdf  100 TOP RECTIFIERSQuestions and Answers pdf  Posted on August 19, 2018  by engineer Leave acomment RECTIFIERS Questions :- 1. What is a dc power supply? The part of the equipment that converts ac into dc is calleddc power supply. 2. Define what is a rectifier? A rectifier is a device which converts alternating current(or voltage) into unidirectional current (or voltage). 3. What is PIV of a diode in a rectifier circuit?   Cust Engineering QuestionsFind us on Google Plus Engineering I 768 followers Follow Engineering interview questions,Mcqs,Objective Questions,ClassNotes,Seminor topics,Lab Viva Pdf free download. CIVIL | Mechanical | CSE |EEE | ECE | IT | Chemical Online Quiz Tests for Freshers. HOMEInterview QuestionsMCQs*LAB VIVACLASS NOTESSEMINAR TOPICSONLINE TESTSSC CGLGATECAT Test TransformerBridge RectifierElectrical TestMechanical Test Ads by Google   Be the first of your friends to like this Engineering Q   … 5.5K likes Like Page  Peak Inverse Voltage (PIV) is the maximum possible voltagethat occurs across a diode when it is reverse biased. 4. What is the importance of peak inverse voltage? If the applied voltage in reverse biased condition exceedspeak inverse voltage (PIV) rating of the diode, then thediode may get damaged. 5. Define why half-wave rectifiers are generally notused in dc power supply? The type of supply available from half-wave rectifier is notsatisfactory for general power supply. That is Define why itis generally not used in dc power supply. 6. Define why diodes are not operated in thebreakdown region in rectifiers? In breakdown region, a diode has a risk of getting damagedor burnt because the magnitude of current flowing throughit increases in an uncontrollable manner. That is Definewhy didoes are not operated in the breakdown region inrectifiers. 7. Ripple as referred to in a rectifier circuit. The ac component contained in the pulsating output of arectifier is known as ripple. 8. What is transformer utilization factor? Transformer utilization factor is defined as the ratio of power delivered to the load and ac rating of secondary of supply power transformer. 9. The output of a 60Hz full-wave bridge rectifier has a60 Hz ripple. It this circuit working properly?  A full-wave rectifier with 60Hz input must have lowestripple frequency equal to twice the input frqeuency i.e.120Hz. If the ripple frequency is 60Hz, it means somediodes in the circuit are not working. 10. Define what is meant by filter? Filter is a device that converts pulsating output of rectifierinto a steady dc level.  RECTIFIERS Interview Questions and Answers :: 11. Define why series inductor and L-section filterscannot be used with half-wave rectifiers? Series inductor and L-section filters cannot be used withhalf-wave rectifiers because operation of series inductordepends upon the current through it and needs a minimumcurrent to flow at all times. 12. Why capacitor input filter is preferred to chokeinput filter? In capacitor input filter, the dc output is much larger andripples are less in comparison to those in choke input filter.So, capacitor input filter is preferred to choke input filter. 13. Why π-filters are not suitable for varying loads? Voltage regulation in case of π-filters is very poor and,therefore, π-filters are not suitable for varying loads. 14. Define why R-C filters are suitable only for lightloads? R-C filters have poor voltage regulation and need adequateventilation to dissipate the heat developed in the resistor R.Thus R-C filters are suitable only for light loads.  15. Why is bleeder resistance employed in a filtercircuit? A resistance, called the bleeder resistance, is placed acrossthe filter ouput, to provide flow of necessary minimumcurrent through the choke at all time. 16. What is the purpose of bleeder resistance in arectifier circuit using L-C filter? Bleeder resistance RB is placed in parallel with the load soas to maintain a certain minimum current through thechoke, even the load resistor gets open-circuited, andimproves filtering action. 17. Define what is meant by voltage regulation of a dcpower supply? The change in voltage from no-load to full-load condition isknown as voltage regulation. 18. Why is it necessary to include voltage stabilizer in apower supply? The magnitude of output dc voltage may vary with thevariation of either the input ac voltage or the magnitude of load current. So at the output of a rectifier-filtercombination a voltage stabilizer is required.  RECTIFIERS Interview Questions and Answers pdf freedownload :: LEAVE A REPLY Test TransformerBridge RectifierElectrical TestMechanical Test Ads by Google
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