Power Electronics Mcqs


Q.  The main objective of static power converters is to____________?

a. Obtain an dc output waveform from a dc power supply
b. Obtain an ac output waveform from a dc power supply
c. Obtain an dc output waveform from a dc power supply
d. Obtain an ac output waveform from a ac power supply


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  The output power of the cascaded amplifier / attenuator system can be determined using___________?
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MCQs:  If the gate voltage of an SCR is removed, then the_______________?
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MCQs:  Anode of an operational SCR is _______________?
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MCQs:  An SCR is made up of silicon because?
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MCQs:  AC power in a load can be controlled by using____________?
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MCQs:  Number of PN junction in an SCR is____________?
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MCQs:  The switching function of semiconductor devices can be characterized with___________?
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MCQs:  IGBT stands for___________?
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MCQs:  In ac – dc conversion, when the switch is closed then the sum of voltages around the loop is____________?
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MCQs:  If a shunt motor is started with its field winding open then?
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MCQs:  A rectifier with an external low pass filter is an example of______________?
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MCQs:  The power demand can be estimated approximately by___________?
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MCQs:  4 thyristors rated 200 V in series. The operating voltage of the string is 600 V. Derating factor of the string is_____________________?
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MCQs:  Unipolar modulation is generally used in____________?
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MCQs:  Dynamic equalizing circuit is used for________________?
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MCQs:  A string of n parallel SCRs is operated at 72 KA, the rating of each SCR is 1 KA. If derating factor of the string is 0.1. value of n will be___________?
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MCQs:  60 thyrsistors are connected in series and parallel to form a 10 KV and 5.5 KA switch. Each thyristor is rated for 1.2 KV, 1 KA. The no. of parallel path are 6. The efficiency of the switch is______________________?
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