Chopper or Buck Converter Question & AnswersFebruary 15, 2023 By Wat Electrical This article lists 100 Chopper or Buck Converter MCQs for engineering students. All the Chopper or Buck Converter 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 Chopper or Buck Converter.The buck converter or chopper steps down the output voltage and step up the output current. There are three names for buck converter they are voltage buck converter, current boost converter, and voltage to current converter. In the voltage buck converter, the output voltage is less than the input source voltage. In the current boost converter, the load current is greater than the source current. The GTO, power MOSFET, power BJT, IGBT, etc are the low-power applications used in the chopper. The thyristor or SCR is the high-power application used in the chopper. In buck-boost converter the number of components and the tracking efficiency is low. The buck-boost converters are used in adaptive control and power applications, it has consumer electronics, used in battery power systems also. The advantages of a buck-boost converter are it gives higher output voltage and low voltage on MOSFETs. The buck converter circuit is also called a voltage-to-current converter because the inductor is present at the output side in the buck converter. 1). Which one of the following steps down the voltage level? Buck converter Boost converter Both a and b None of the above None Hint2). The position of switch in step up chopper is in ______________? Series with the load Parallel with the load Both a and b None of the above None Hint3). _____________________ are the low power applications used in chopper? GTO SCR Thyristor None of the above None Hint4). Which one of the following types of choppers is based on input and output voltage levels? Class A First quadrant Voltage commutated Step up chopper None Hint5). Which one of the following choppers used for monitoring operation and for motor load? Step-up Step-down Both a and b None of the above None Hint6). The buck converter comes under ______________ converter? Isolation Non-isolation Both a and b None of the above None Hint7). Which one of the following converters used in data communication system? Buck Boost Both a and b None of the above None Hint8). During fault conditions of load the di/dt is limited by industry in ________________ converter? Buck converter Boost converter Both a and b None of the above None Hint9). The current boost converter is also another name of _________________ converter? Boost converter Buck converter Both a and b None of the above None Hint10). In which one of the following converters the input current is discontinuous in nature? Buck converter Boost converter Both a and b None of the above None Hint11). Which one of the following converters steps up the average output current? Buck converter Boost converter Both a and b None of the above None Hint12). Which one of the following switches is open to configuration? Unmanaged switch Managed switch Both a and b None of the above None Hint13). The power range historically used in active clamp forward topology is ______________? 50 W – 300 W 500 W 5000 W None of the above None Hint14). The power density of two-level DAB converter is _______________________? Very high Medium High Low None Hint15). The power density of DC-MMC converter is _______________________? Very low Medium High Low None Hint16). The conversion type of linear regulators and LDOs is ____________________? Step up Step down Both a and b None of the above None Hint17). What is the standard form of SCALDO? Single Capacitor Assisted Low Drop Out Simple Capacitor Assisted Low Drop Out Super Capacitor Assisted Low Drop Out None of the above None Hint18). The operating temperature range of super capacitors is ________________? -40 to +70 -20 to +70 -10 to +70 None of the above None Hint19). The figure shown below is a circuit diagram of _______________ converter? Buck converter Boost converter Buck-boost converter None of the above None Hint20). Which one of the following converters provides higher current? Buck converter Boost converter Both a and b None of the above None Hint21). Which one of the following types of choppers is based on commutation method? Class A First quadrant Voltage commutated Step up chopper None Hint22). The power density of super capacitors is _________________ W/Kg? 10000 1400 32000 58000 None Hint23). The voltage gain is less than one or greater than one in ______________ converter? ZETA Buck Both a and b None of the above None Hint24). In which one of the following control the T-ON is variable? PWM control Variable frequency control Current limit control None of the above None Hint25). Which one of the following control methods requires current limiting circuitry? Current mode Voltage mode Both a and b None of the above None HintChopper or Buck Converter MCQ for Quiz26). The M/1-2D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Buck boost None Hint27). In which one of the following class choppers the load current is negative? Class A Class B Class C Class D None Hint28). What is the standard form of ZCC? Zero Clamped Current Zero Current Controller Zero Controller Current None of the above None Hint29). The figure shown below is a circuit diagram of _______________ converter? Buck converter Boost converter Buck-boost converter None of the above None Hint30). Which one of the following converters provides lower voltage? Buck converter Boost converter Both a and b None of the above None Hint31). What is the standard form of ZVS? Zero Voltage Semiconductor Zero Voltage Switching Zero Voltage Source None of the above None Hint32). In which one of the following converters the tracking efficiency is low? Buck-boost converter SEPIC converter CUK converter None of the above None Hint33). In which one of the following converters the current measurement is hard? Buck-boost converter SEPIC converter CUK converter None of the above None Hint34). In which one of the following converters, the control requirement is isolated? SEPIC converter CUK converter Buck-boost converter None of the above None Hint35). In which one of the following converters the fluctuations are high? Buck-boost converter SEPIC converter CUK converter None of the above None Hint36). In which one of the following converters, the number of components are low? SEPIC converter CUK converter Buck-boost converter None of the above None Hint37). The figure shown below is a circuit diagram of _______________ converter? Buck converter Boost converter Buck-boost converter None of the above None Hint38). The design and implementation complexity are high in _____________________? NPC FC CHB None of the above None Hint39). What is the standard form of ZCS? Zero Current Semiconductor Zero Current Switching Zero Current Source None of the above None Hint40). In which one of the following converters the large filter is required? Buck converter Buck-boost converter Boost converter Both a and b None Hint41). Which one of the following is a single quadrant chopper? Step-up converter Step-down converter Both a and b None of the above None Hint42). The power density of resonant converter is _______________________? Very low Medium High Low None Hint43). Which one of the following control strategy the design of an output filter for continuous current operation is easy? PWM control Variable frequency control Current limit control None of the above None Hint44). The 1/1-2D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Buck boost None Hint45). Which one of the following is a second quadrant chopper? Class A Class B Class C Class D None Hint46). What is the standard form of ZCV? Zero Clamped Voltage Zero Current Voltage Zero Controller Voltage None of the above None Hint47). The figure shown below is a block diagram of _______________ converter? Buck converter Boost converter Closed loop control for converter None of the above None Hint48). What is the standard form of OCC? One Cycle Control One Cycle Commutator One Controller Cycle None of the above None Hint49). What is the standard form of SRC? Series Resonant Converter Series Resistance Converter Series Reactance Converter None of the above None Hint50). In which one of the following converters the Vout is free? Buck converter Buck-boost converter Boost converter Both a and b None HintChopper or Buck Converter MCQ for Exams51). Which one of the following types of choppers is based on circuit operation? Class A First quadrant Voltage commutated Step up chopper None Hint52). Which one of the following choppers functions in first, and second quadrant? Class C Class D Class E None of the above None Hint53). The frequency or time period is constant in _________________ control? PWM control Variable frequency control Current limit control None of the above None Hint54). Which one of the following control methods requires VIN feed forward circuit? Current mode Voltage mode Both a and b None of the above None Hint55). The 1-2D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Buck boost None Hint56). What is the standard form of ZCT? Zero Clamped Transition Zero Current Transition Zero Controller Transition None of the above None Hint57). The power sharing is a control concern in _____________ converter topology? NPC CHB FC None of the above None Hint58). In which one of the following converter topologies the design and implementation complexity is low? NPC CHB FC None of the above None Hint59). What is the standard form of PRC? Parallel Resonant Converter Parallel Resistance Converter Parallel Reactance Converter None of the above None Hint60). Which one of the following is also known as step up chopper? Buck converter Boost converter Both a and b None of the above None Hint61). In which one of the following choppers the inductor is not required? Step-up Step-down Both a and b None of the above None Hint62). The D/1-D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Buck boost None Hint63). The input current is non-pulsating in _________________ converter? Buck converter Boost converter Both a and b None of the above None Hint64). The MPPT region is unbounded in ______________ converter? Buck Boost Buck-boost None of the above None Hint65). In which one of the following DC-DC converters the energy transfer is bi-directional? Diode Pump charge Bi-boost converter None of the above None HintRead more about DC to DC Converter66). Which one of the following is a first quadrant chopper? Class A Class B Class C Class D None Hint67). What is the standard form of ZVT? Zero Voltage Transformer Zero Voltage Transition Zero Voltage Transistor None of the above None Hint68). The voltage balancing is a control concern in _____________ converter topology? NPC CHB Buck None of the above None Hint69). The voltage setup is a control concern in _____________ converter topology? NPC CHB FC None of the above None Hint70). Which one of the following is also known as step down chopper? Buck converter Boost converter Both a and b None of the above None Hint71). Which one of the following choppers functions in first, and fourth quadrant? Class C Class D Class E None of the above None Hint72). The D/1-2D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Z-H buck boost None Hint73). What is the standard form of GTO? Gate Turnoff Thyristor Gate Turnoff Transformer Gate Turnoff Transistor None of the above None Hint74). The output current is non-pulsating in _________________ converter? Buck converter Boost converter Both a and b None of the above None Hint75). Which one of the following class choppers is also called forward monitoring mode? Class A Class B Class C Class D None HintChopper or Buck Converter MCQ for Students76). What is the standard form of CCM? Control Conduction Mode Common Conduction Mode Continuous Conduction Mode None of the above None Hint77). The step-down mechanism is reactive in __________________? Buck converter LDO Both a and b None of the above None Hint78). In which one of the following the noise can be high? Buck converter LDO Both a and b None of the above None Hint79). What is the standard form of NPC? Neutral Point Commutator Neutral Point Controller Neutral Point Clamped None of the above None Hint80). In which one of the following the efficiency and EMI noise is low? Linear regulator Switching regulator Charge pump Both a and b None Hint81). In which one of the following choppers the power flows always from source to load? Step-up Step-down Both a and b None of the above None Hint82). The typical energy efficiency range if chopper is ____________________? 65% to 45% 5% to 45% 15% to 45% 25% to 45% None Hint83). Which one of the following is used for severe plugging? Cutter Chopper Both a and b None of the above None Hint84). Which one of the following choppers functions in first, second, third, and fourth quadrant? Class C Class D Class E None of the above None Hint85). In which one of the following control the T-ON is constant? PWM control Variable frequency control Current limit control None of the above None Hint86). In which one of the following mode the transient response is more complex? Current mode Voltage mode Peak current mode None of the above None Hint87). What is the standard form of DCM? Discontinuous Control Mode Discontinuous Common Mode Discontinuous Conduction Mode None of the above None Hint88). The stepdown mechanism is resistive in _________________? LDO Buck converter Boost converter None of the above None Hint89). What is the standard form of CHB? Commutator H-Bridge Common H-Bridge Cascaded H-Bridge None of the above None Hint90). In which one of the following the solution size is large? Linear regulator Switching regulator Charge pump Both a and b None Hint91). Which one of the following is not retrofittable to existing pumps? Chopper Cutter Both a and b None of the above None Hint92). The dynamic range is narrow in ______________ converter? ZETA Buck Both a and b None of the above None Hint93). The power density of MMC-DAB converter is _______________________? Very low Medium High Low None Hint94). The power range historically used in flyback converter topology is ______________? 50 W – 300 W 500 W 5000 W <100 W None Hint95). The voltage buck converter is also another name of _________________ converter? Boost converter Buck converter Both a and b None of the above None Hint96). Which one of the following converters used in portable device applications? Buck Boost Both a and b None of the above None Hint97). The flyback converter comes under ___________________ converter? Non-isolation Isolation Both a and b None of the above None Hint98). Which one of the following choppers used for regenerative braking for motor load? Step-up Step-down Both a and b None of the above None Hint99). Which one of the following types of choppers is based on directions of output voltage and current? Class A First quadrant Voltage commutated Step up chopper None Hint100). In which one of the following the output current is low to high? Linear regulator Switching regulator Charge pump Both a and b None Hint Time's up
