Phase Controlled Rectifier Question & Answers August 2, 2022 By WatElectronics This article lists 100 Phase controlled rectifier MCQs for engineering students. All the Phase controlled rectifier Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Phase controlled rectifiers. Phase controlled rectifier is one type of rectifier circuit. Based on input supply it is divided into two types such as single-phase and three-phase rectifiers. Single phase structured rectifiers are assorted into two categories: Half wave and Full wave controlled rectifiers. Half wave controlled rectifiers which is an isolated thyristor device/tool that produces a moderate cycle of inserted AC supply and lowers DC turnout. Full wave-structured rectifiers produce high DC output and have center-tapped transformers with two thyristors. Bridge rectifiers don't require transformers. Three-phase structured rectifiers work with three phase input AC supply. Semi converter has only a single version of output voltage and electric current. The full converter has one polarity of +positive or -negative output voltage and one polarity of current with either +positive or -negative. A dual converter has both polarities of output current and output voltage with two signs. Phase-controlled rectifiers are used in Magnetic power supplies, high voltage DC, motor drives, and battery charges. Thyristors and diodes are used in different phases. Name Email 1). Expand PCR Full form _____? Phase-Controlled Rectifier Phase-Controlled Remover Phase Circuit Remover None Of These None Hint 2). Phase controlled rectifier is a ____ circuit? Transfer Rectifier Amplified None of these None Hint 3). Expand SCR Full form _____? Silicon-Controlled Rectifier Silicon-Controlled Remover Silicon Circuit Remover None Of These None Hint Read more about SCR. 4). Phase-controlled rectifier is organized into ___ categories? 1 2 3 4 None Hint 5). A rectifier is a ___ type of device? Electrical Electronic Mechanical Both a and b None Hint Read more about Rectifier 6). Full wave phase controlled rectifiers are assorted into ___ categories? 1 2 3 4 None Hint 7). Half controlled rectifier used in _____ configuration? Switch Node Bridge None of these None Hint 8). Half-controlled rectifiers use diodes and ___ for rectification? PCR SCR MCR LCR None Hint 9). Half controlled rectifier bridge holds an equal number of ____ and SCRs? Nodes Bridges Diodes None of these None Hint 10). A Half controlled rectifier bridge has ___ polarity resultant wave? Positive Negative Zero Both a and b None Hint 11). For rectification only SCRs are used in _____? Half-controlled rectifiers Full controlled rectifiers Semi Half controlled rectifiers Semi-Controlled Rectifier None Hint 12). Full controlled rectifier used in _____ configuration? Switch Node Bridge None of these None Hint 13). Efficiency of rectifiers is above ____? 85% 95% 100% 92% None Hint 14). Controlled rectifiers convert ac voltage to dc voltage known as ____? DC to AC converters AC to DC converters AC converter DC Converter None Hint 15). Controlled rectifiers are used in ____ regulator? Car-Speed Alarm-Speed Fan Speed None of these None Hint 16). Applications of Phase controlled rectifiers are ___ power supplies? Electric Magnetic Electromagnetic None of these None Hint 17). How many types of Single Phase type Controlled Rectifiers exist? 1 3 4 6 None Hint 18). How many types of Three Phase Controlled Rectifiers exist? 2 3 5 4 None Hint 19). Output dc power delivered to the load is ____ in an electric circuit? V*I V/I I/V V None Hint 20). Rectification Ratio ƞ=____? P(dc)/P(ac) P(dc)*P(ac) P(dc)+P(ac) None of these None Hint 21). Output voltage consists of ac/ripple and ___ component? Discontinuous DC AC Trigger None Hint 22). Current ripple factor ri=____? Iac*Idc Iac/Idc Iac+Idc None of these None Hint 23). Expand TUF Full form _____? Transistor Utilization Form Transformer Union Factor Transformer Utilization Factor None of these None Hint 24). Crest Factor CF is the ratio of ____? Peak input supply current / RMS input supply current Peak input supply current + RMS input supply current Peak input supply current - RMS input supply current Peak input supply current * RMS input supply current None Hint 25). Load circuit time constant. ꞇ=____? LR L/R L/C RC None Hint Phase Controlled Rectifier MCQs for Students 26). If The values of load inductance and trigger angles are low, then the load type current is ____? Continuous Discontinuous Proper Relevant None Hint 27). If The values of load inductance and trigger angles are high/large, then the load type current is ____? Continuous Discontinuous Proper Relevant None Hint 28). A center-tapped transformer in a full wave rectifier is quite ____ and bulky? Heavier Slow Distant Challenging None Hint 29). Cost of the transformer is ____ for the accepted dc type output voltage & output power? Less More Finite Constant None Hint 30). The time delay between the gating signals of thyristors is ___ degrees? Zero 90 180 180 None Hint Read more about Thyristors . 31). The RMS thyristor current can be calculated as IT(RMS)=____? IO(RMS)+2 IO(RMS)/2 IO(RMS)2 None of these None Hint 32). The average thyristor current can be calculated as IT(avg)=____? IO(dc)+2 IO(dc)/2 IO(dc)2 None Hint 33). In this Non-Circulating Current system of Operation, only one ____ is employed at a time? Converter Amplifier Actuator Model None Hint 34). Two converters are present in the _______ current system? Actuators Non-Circulating Non-Terminator None of these None Hint 35). When converter 1 is switched ON then Vdc and Idc are ____ in the Non-Circulating current system? Zero Constant Positive Negative None Hint 36). When converter 2 is switched ON then Vdc and Idc are ____ in the Non-Circulating current system? Zero Constant Positive Negative None Hint 37). The time response for changing from one _____ functioning to another is faster? Quadrant Medium Flow None Of these None Hint 38). Thyristor can change the output voltage by modifying ____ angle? Cosine Trigonometry Sine Firing None Hint 39). Full wave structured rectifier with a middle tapped transformer requires two ___? Diodes Thyristors Amplifiers None of these None Hint 40). Full wave bridge structured rectifiers do not require __ component? Center-tapped transformer Diode Switch None of these None Hint 41). 3-phase structured rectifier requires three phases ___ input supply? AC DC Regulated current None Of These None Hint 42). Dual converter tasks in four ____? Divisions Additions Subtractions None Of these None Hint 43). A semi converter is a ___ quadrant converter? Single Dual Tri Quadruple None Hint 44). Single polarity of o/p VI exists in ___ converter? Dual Semi Full Complete None Hint 45). Polarity may be + ve or -ve for current and voltage in ___ converter? Dual Semi Full Half None Hint 46). A full converter is a ___ quadrant converter? Single Dual Tri Quadruple None Hint 47). Both output current and voltage have +ve and ___ polarities in the dual converter? Positive Negative Constant Null None Hint 48). The input rectifier acts as a ____ charger? USB type C Battery Micro USB None of these None Hint 49). The static ___ switch is turned on and the critical load is fed directly from the mains? Bypass Single pole Bell push None of these None Hint 50). The primary AC supply voltages are denoted with ___? AVP VS VP AVS None Hint Phase Controlled Rectifier MCQs for Quiz 51). The secondary AC supply voltages are denoted with ___? AVP VP VS AVS None Hint 52). The thyristor is activated at a delay angle of ωt =____? π € β α None Hint 53). The ripple frequency of output voltage in a single wave-structured rectifier is __Hz? 20 30 40 50 None Hint 54). Due to the ‘RL’ load maximum, the current through SCR ____? Increases Decreases Null Constant None Hint 55). Which of the following is the units of current? Amps Ohms Farads None of these None Hint 56). In the positive moderate cycle, ____ reserves energy & that brings about the voltage? Capacitor Resistor Inductor Amplifier None Hint 57). Transition of AC to DC is known as ____? Conversion Rectification Amplification None of these None Hint 58). At the inverted cycle, thyristor gets turned OFF and moves into ____? Forward Bias Reverse Bias Continuous Constant None Hint 59). Resistance is measured in terms of __? Ohms Farads Henry None of these None Hint 60). The angle Beta is called ____ angle? Cosine Sine Extinction None of these None Hint 61). The duration from Alpha to Beta is called ___ angle? Extinction Conduction Cosine Firing None Hint 62). Single form entire wave structured rectifier with R load consists of ___ thyristors? Two Four Three One None Hint 63). In Single phase type entire wave controlled rectifiers, during non-inverted Vin, T1 and T2 are ____/straight biased? Forward Reverse Constant None of these None Hint 64). In Single form entire wave controlled rectifiers, during a inverted of Vin, T1 and T2 are ____biased? Forward Reverse Constant None of these None Hint 65). Inductance is expressed in terms of ___? Farads Henrys Amperes Ohms None Hint 66). During the inverted cycle at wt=_____ T3 and T4 are straight bias, in entire wave structured rectifier with RL and freewheeling diode? Pi 1/2 pi/4 None of these None Hint 67). During the positive moderate cycle at wt=_____ T1 and T2 are straight bias, in entire wave controlled rectifier with RL and freewheeling diode? Pi 2Pi Pi/2 None of these None Hint 68). In single phase entire wave half controlled rectifiers have two thyristors and ___? Amplifiers Actuators Diodes Controllers None Hint 69). During non-inverted cycle in semi converter, the ___ components are straight biased? Thyristors Resistors Inductor Capacitors None Hint 70). During non-inverted cycle in semi converter, the thyristors T2 and __ are reverse biased? T2 D1 D2 T3 None Hint 71). Rectifiers are differentiated based on the number of ____ present in the circuitry? Amplifiers Actuators Diodes Transistors None Hint 72). How many diodes are present in the center entire wave rectifier? One Two Three Four None Hint 73). Transformer is required in ___ wave-tapped rectifiers? Half Full Center None of these None Hint 74). Transformer is not ____ in half-wave rectifiers? Required Gathered Added Moved None Hint Read more about Full-wave rectifiers 75). How many diodes are present in the half-wave rectifier? One Two Three Four None Hint Phase Controlled Rectifier MCQs for Interviews 76). How many diodes are present in the full wave rectifier? One Two Three Four None Hint Read more about Full Wave Rectifier 77). Ripple factor of the Half wave rectifier is ___? 1.21 0.482 0.241 None of these None Hint 78). Ripple factor of the full wave rectifier is ___? 1.21 0.482 0.241 None of these None Hint 79). Ripple factor of the center tapped wave rectifier is ___? 1.21 0.482 0.241 None of these None Hint 80). Maximum efficiency of half wave rectifiers is ___? 20.3% 40.6% 91.2% 60.6% None Hint 81). Maximum efficiency of full wave rectifiers is ___? 40.6% 81.2% 60.4% 80.2% None Hint 82). Maximum efficiency of a center tapped wave rectifier is ___? 81.2% 40.6% 60.4% 80.2% None Hint 83). Ripple frequency of center tapped wave rectifiers is___ Hz? 50 70 60 100 None Hint 84). Peak inverse voltage of half wave rectifier is ___? Vm 2Vm Vm/2 4Vm None Hint 85). Peak inverse voltage of full wave rectifier is ___? Vm 2Vm Vm/2 4Vm None Hint 86). Output frequency of half wave rectifier is ___? f in 2f in f in/2 f in/4 None Hint 87). Output frequency of full wave rectifier is ___? f in 2f in f in/2 f in/4 None Hint 88). T.U.F of single phase half wave rectifiers is ___? 0.287 0.456 0.245 0.457 None Hint 89). T.U.F of uni phase based full wave rectifiers is___? 0.287 0.693 0.842 0.345 None Hint 90). T.U.F of single phase centre tapped wave rectifiers is___? 0.287 0.693 0.812 0.345 None Hint 91). High-cost ___ is not required to give a steady direct current output? Filtering Transformation Transition None of these None Hint 92). Three phase controlled rectifiers are used in ____power supplies? Thermal Electric Magnetic None of these None Hint 93). 3 phase controlled rectifiers are more ____? Easy Tough Flexible None of these None Hint 94). 3-phase rectification, also known as ___rectification? Poly-Phase Firing Delay None of these None Hint 95). Efficiency is the ratio of DC power to ____ power? Input Output Ratio None of these None Hint 96). Multi-phase rectifiers produce a higher ____ frequency? Low Pass High Pass Ripple None of these None Hint 97). Higher ripple frequency means ___ capacitance? High Less Medium Null None Hint 98). Power rectification changes an alternating supply into a ____supply? Unidirectional Bidirectional Trigonal None of these None Hint 99). Increasing the number of diodes and phases improves average DC ___? Voltage Current Resistance Inductance None Hint 100). In 3 phase rectifier firing angle is zero i.e cosine angle is ___? 1 2 3 4 None Hint For More MCQs Rectifiers' Question & Answers Bridge Rectifier Question & Answers Silicon Controlled Rectifier Question & Answers Please fill in the comment box below. Time's up