Rectifiers Question & Answers February 15, 2022 By WatElectronics This article lists 100 Rectifiers MCQs for Engineering Students. All the Rectifiers Questions & Answers given below includes solution and link wherever possible to the relevant topic. This topic is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Rectifiers. Rectifiers are electronic devices that convert the alternating current signal into a pulsating direct current signal. We provide ac signals to the devices and the output we will get is the dc signal. There are thousands of devices like mobiles, laptops, etc all use dc supply but in our houses or industries, we only get ac supply, here the rectification process steps in and converts ac signal into dc signal, so that's how we get the dc signal. If we don't have dc we can't charge our devices, so the process of rectification plays an important role in our day-to-day life. In a rectifier circuit, the current is allowed to flow uninterrupted in one direction and no current is allowed to flow in the opposite direction. The halfwave rectifiers, full-wave rectifiers, and bridge rectifiers are the type of rectifiers. The full-wave rectifier circuits produce an output voltage or current which is purely dc or has some specified dc component. The 3-phase half-wave rectifier, 3-phase midpoint 6pulse rectifier, 3-phase bridge rectifier, and 3-phase 12 pulse rectifier are the type of three-phase uncontrolled rectifiers. In an uncontrolled rectifier, the direction of power flow is the source to load only whereas, in a controlled rectifier, the direction of power flow is possible from the load to source, and also from source to load. Mobile chargers, electrical vehicles, cranes, mixers, welding, trains, welding machines, washing machines, etc are the few applications of the rectifier. 1). The input is a ______________ wire supply in single phase rectifier? Two Three Four Five None Hint 2). The transformer utilization factor is less in _______________ phase rectifier Three Single Both a and b None of the above None Hint 3). The additional filters are required in ________________________ phase filter? Three Single Both a and b None of the above None Hint 4). The peak inverse voltage is low in ________________________ phase filter? Three Single Both a and b None of the above None Hint Read more about Rectifiers 5). In single-phase rectifier, the maximum output voltage is the maximum phase to _____________________ potential? Neutral Phase Both a and b None of the above None Hint 6). The power delivery and efficiency is low in __________________________ phase rectifier? Three Single Both a and b None of the above None Hint 7). What is the full form of RFI? Radio Frequency Interference Radio Frequency Interrupt Receiver Frequency Interference None of the above None Hint 8). The three phase uncontrolled rectifier categorized into _________________________ types Two Three Four Five None Hint 9). The free wheeling diode is not required in _____________________ rectifier? Controlled Uncontrolled Both a and b None of the above None Hint 10). What is the standard form of JBS? Junction Barrier Controlled Schottky Junction Barrier Simplifier Junction Barrier Controlled Semiconductor None of the above None Hint 11). The control circuit or triggering circuit not required in ______________________ rectifiers Controlled Uncontrolled Both a and b None of the above None Hint 12). The control of load power is possible in ________________________ rectifier Controlled Uncontrolled Both a and b None of the above None Hint 13). In which one of the following rectifier only diodes are used? Controlled Uncontrolled Both a and b None of the above None Hint 14). In which one of the following rectifiers is the direction of power flow is the source to load only? Controlled Uncontrolled Both a and b None of the above None Hint 15). In three-phase rectifier, the maximum output voltage is the maximum phase to ______________ potential? Neutral Phase Both a and b None of the above None Hint 16). The controlled rectifiers are used in ______________________ devices? Power supplies Battery chargers DC motor controllers Both c and b None Hint 17). Which one of the following rectifiers was made with only one diode? Half-wave Full-wave Both a and b None of the above None Hint Read more about Full-wave Rectifier 18). Which one of the following rectifiers uses four diodes? Half-wave Full-wave Bridge None of the above None Hint 19). How many terminals do silicon control rectifiers have? One Two Three Four None Hint 20). What is the standard form of TSBS? Schottky Barrier Controlled Schottky Trench Schottky Barrier Controlled Semiconductor Trench Schottky Barrier Controlled Schottky None of the above None Hint 21). In controlled rectifiers the device's turn on at _________________ Delay Firing At zero crossing of supply voltage None of the above None Hint 22). The number of SCRs we use in single-phase bridge inverter is __________________ Two Four Six Eight None Hint 23). Which one of the following rectifiers is based upon diodes? Controlled Uncontrolled Both a and b None of the above None Hint 24). The ratio of real power divided by apparent power is known as ________________ factor? Crest Power THD None of the above None Hint 25). The power delivery and efficiency is low in __________________________ phase rectifier? Three Single Both a and b None of the above None Hint Rectifiers MCQs for Quiz 26). The surge current through diodes is low and need not be controlled in _____________ filter? Capacitor filter Choke input/L filter LC filter Both b and c None Hint 27). The maximum input voltage of the RB156 bridge rectifier is _____________________ 5V 100V 250V 560V None Hint 28). The load is connected in series with _______________________ in silicon controlled rectifiers? Anode Cathode Both a and b None of the above None Hint 29). An silicon controlled rectifier is a ______________________ triggered device? Voltage Current Both a and b None of the above None Hint 30). What is the standard form of MBS? MOS Barrier Controlled Schottky Metal Barrier Controlled Schottky Mass Barrier Controlled Schottky None of the above None Hint 31). What is the standard form of TCR? Thyristor Controlled Rectifier Transistor Common Rectifier Thyristor Controlled Rectifier None of the above None Hint 32). Which one of the following rectifiers has both diodes and thyristors? Controlled Half controlled Uncontrolled None of the above None Hint 33). How many semiconductor layers do silicon-controlled rectifiers have? One Two Three Four None Hint 34). The angle of conduction in silicon-controlled rectifiers circuit changed by __________________________ voltage? Anode Cathode Gate None of the above None Hint 35). The freewheeling diode is required in _____________________ rectifier? Controlled Uncontrolled Both a and b None of the above None Hint 36). Which one of the following rectifiers is based upon thyristor? Controlled Uncontrolled Both a and b None of the above None Hint 37). What is the standard form of DPF? Dissipation Power Factor Destruction Power Factor Displacement Power Factor None of the above None Hint 38). What is the full form of THD? Total Harmonic Distortion Thermal Harmonic Distribution Thermal Harmonic Dissipation None of the above None Hint 39). The maximum peak reverse voltage of the RB156 bridge rectifier is _____________________ 5V 100V 250V 800V None Hint 40). What is the standard form of MPS? MOS P-I-N Schottky Metal P-I-N Schottky Merged P-I-N Schottky None of the above None Hint 41). The surge current of RB156 bridge rectifier is around _____________________ amperes 50 10 250 500 None Hint 42). The output DC current of RB156 bridge rectifier is around ________________ amperes? 50 10 1.5 500 None Hint 43). The PWM rectifiers are categorized into _______________________ types? One Two Three Four None Hint 44). How many terminals do SCR rectifiers have? One Two Three Four None Hint 45). In which one of the following rectifier SCRs and diodes or only SCRs are used? Controlled Uncontrolled Both a and b None of the above None Hint 46). Which one of the following rectifiers has only diodes? Controlled Half controlled Uncontrolled None of the above None Hint 47). Which one of the following has four layers? Thyristors Transistors Both a and b None of the above None Hint 48). Which one of the following has a very very small to very large power rating? Thyristors Transistors Both a and b None of the above None Hint 49). Which one of the following has high control capability? Thyristors Transistors Both a and b None of the above None Hint 50). The controlled rectifiers are categorized into ____________________ types? One Two Three Four None Hint Rectifiers MCQs for Interviews 51). The uncontrolled rectifiers are used in ______________________ devices? Power supplies Battery chargers DC motor controllers Both c and b None Hint 52). The AC ripple voltage across filter output divided by AC ripple voltage applied to filter input is known as _____________________ factor? Reduction Ripple Power None of the above None Hint 53). Which one of the following rectifiers was made with only one diode? Half-wave Full-wave Both a and b None of the above None Hint 54). The number of SCRs we use in three-phase bridge inverter is __________________ Two Four Six Eight None Hint 55). In which one of the following rectifiers is the direction of power flow is the load to source and source to load is possible? Controlled Uncontrolled Both a and b None of the above None Hint 56). In which one of the following inverters there is no particular mode of operation? Single-phase bridge Three-phase bridge Both a and b None of the above None Hint 57). Which one of the following is not a terminal of an SCR rectifier? Grid Anode Cathode All of the above None Hint 58). How many PN junctions does SCR has? One Two Three Four None Hint 59). An silicon controlled rectifier is turned off by reducing the ________________ voltage to zero? Anode Gate Both a and b None of the above None Hint 60). The input is a _____________________ wire supply in three-phase rectifier? Two Three Four Three or four None Hint 61). Which one of the following rectifiers has only thyristors? Controlled Half controlled Uncontrolled None of the above None Hint 62). Which one of the following has three layers? Thyristors Transistors Both a and b None of the above None Hint 63). What is the standard form of GTO? Gate Turn-off Thyristor Gate Turn-off Transistor Gate Turn-off Transformer None of the above None Hint 64). Which one of the following pulse rectifiers has three phases? Six pulse rectifier Ten pulse rectifier Twelve pulse rectifier Both a and c None Hint 65). In uncontrolled rectifiers the device's turn on at ______________________ angle? Delay Firing At zero crossing of supply voltage Delay or Firing None Hint 66). The number of pulses are six in ________________ pulse rectifier? Six pulse Ten pulse Twelve pulse None of the above None Hint 67). The THD for maximum average value is _______________________ in six pulse rectifier? 31.1% 1.1% 3% 1% None Hint 68). Which one of the following is a half-wave rectifier circuit diagram? Fig (a) Fig (b) Fig (c) None of the above None Hint Read more about Half-wave Rectifier 69). Which one of the following filters is useful in reducing ripple in load voltage? Capacitor filter Choke input/L filter LC filter None of the above None Hint 70). The transformer utilization factor is more in _____________________ phase rectifier Three Single Both a and b None of the above None Hint 71). The number of output phases for a single-phase bridge inverter is _________________ One Two Three None of the above None Hint 72). The output waveform for a single-phase bridge inverter is _______________________ wave? Square Quasi Square Both a and b None of the above None Hint 73). Which one of the following bridge inverters is suitable for low power applications? Single-phase Three-phase Both a and b None of the above None Hint 74). Which one of the following has two or more junction devices? Thyristors Transistors Both a and b None of the above None Hint 75). What is the standard form of IGCT? Integrated Gate Commutated Transistor Integrated Gate Commutated Thyristor Integrated Gate Commutated Transformer None of the above None Hint Rectifiers MCQs for Exams 76). What is the standard form of ETO? Emitter Turnoff Transistor Emitter Turnoff Thyristor Emitter Turnoff Transformer None of the above None Hint 77). Which one of the following pulse rectifiers has five phases? Six pulse rectifier Ten pulse rectifier Twelve pulse rectifier None of the above None Hint 78). The number of pulses are 10 in ________________________ pulse rectifier? Six pulse Ten pulse Twelve pulse None of the above None Hint 79). The phase shifting transformer is mandatory in __________ pulse rectifier? Six pulse Ten pulse Twelve pulse Both a and b None Hint 80). The additional filters are not required in ________________________ phase filter? Three Single Both a and b None of the above None Hint 81). Which one of the following inverters has two modes of operation? Single-phase bridge Three-phase bridge Both a and b None of the above None Hint 82). The number of output phases for a three-phase bridge inverter is _______________________ One Two Three None of the above None Hint 83). The output waveform for a three-phase bridge inverter is _______________________ wave? Square Quasi Square Both a and b None of the above None Hint 84). Which one of the following bridge inverters is suitable for high power applications? Single-phase Three-phase Both a and b None of the above None Hint 85). Which one of the following has only two junction devices? Thyristors Transistors Both a and b None of the above None Hint 86). What is the standard form of MCT? Metal Commutated Transistor Mos Controlled Thyristor Metal Commutated Transformer None of the above None Hint 87). The THD for maximum average value is _______________________ in ten pulse rectifier? 31.1% 65.5% 3% 1% None Hint 88). Which one of the following is a full-wave rectifier circuit diagram? Fig (a) Fig (b) Fig (c) None of the above None Hint 89). Which one of the following filters is useful in reducing ripple in load current? Capacitor filter CLC type filter LC filter None of the above None Hint 90). The peak inverse voltage is high in ________________ phase filter? Three Single Both a and b None of the above None Hint 91). What is the standard form of SIT? Silicon Integrated Transistor Silicon Induction Transistor Static Induction Thyristor None of the above None Hint 92). The number of switches are 10 in ________________________ pulse rectifier? Six pulse Ten pulse Twelve pulse None of the above None Hint 93). The phase-shifting transformer is not mandatory in _______________________ pulse rectifier? Six pulse Ten pulse Twelve pulse Both a and b None Hint 94). Which one of the following is a bridge rectifier circuit diagram? Fig (a) Fig (b) Fig (c) None of the above None Hint 95). The ratio of peak input supply current divided by RMS input supply current is known as ____________ factor? Crest Power THD None of the above None Hint 96). How many number of switches does the twelve pulse rectifier require? One Six Ten Twelve None Hint 97). The THD for maximum average value is _______________________ in twelve pulse rectifier? 31.1% 65.5% 3% 13.3% None Hint 98). The surge current through diodes is very high and must be controlled in ____________________ filter? Capacitor filter Choke input/L filter LC filter None of the above None Hint 99). The ratio of peak input supply current divided by RMS input supply current is known as _______________ factor? Crest Power THD None of the above None Hint 100). The ripple factor is _____________________ in single-phase rectifier? Very high Low High Better None Hint For More MCQs Bridge Rectifier Questions & Answers Silicon Controlled Rectifier Questions & Answers Please fill in the comment box below. Time's up
