Chopper or Buck Converter Question & Answers February 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 Hint 2). 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 Hint 3). _____________________ are the low power applications used in chopper? GTO SCR Thyristor None of the above Hint 4). 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 Hint 5). 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 Hint 6). The buck converter comes under ______________ converter? Isolation Non-isolation Both a and b None of the above Hint 7). Which one of the following converters used in data communication system? Buck Boost Both a and b None of the above Hint 8). 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 Hint 9). The current boost converter is also another name of _________________ converter? Boost converter Buck converter Both a and b None of the above Hint 10). 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 Hint 11). Which one of the following converters steps up the average output current? Buck converter Boost converter Both a and b None of the above Hint 12). Which one of the following switches is open to configuration? Unmanaged switch Managed switch Both a and b None of the above Hint 13). The power range historically used in active clamp forward topology is ______________? 50 W – 300 W 500 W 5000 W None of the above Hint 14). The power density of two-level DAB converter is _______________________? Very high Medium High Low Hint 15). The power density of DC-MMC converter is _______________________? Very low Medium High Low Hint 16). The conversion type of linear regulators and LDOs is ____________________? Step up Step down Both a and b None of the above Hint 17). 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 Hint 18). The operating temperature range of super capacitors is ________________? -40 to +70 -20 to +70 -10 to +70 None of the above Hint 19). The figure shown below is a circuit diagram of _______________ converter? Buck converter Boost converter Buck-boost converter None of the above Hint 20). Which one of the following converters provides higher current? Buck converter Boost converter Both a and b None of the above Hint 21). Which one of the following types of choppers is based on commutation method? Class A First quadrant Voltage commutated Step up chopper Hint 22). The power density of super capacitors is _________________ W/Kg? 10000 1400 32000 58000 Hint 23). The voltage gain is less than one or greater than one in ______________ converter? ZETA Buck Both a and b None of the above Hint 24). In which one of the following control the T-ON is variable? PWM control Variable frequency control Current limit control None of the above Hint 25). Which one of the following control methods requires current limiting circuitry? Current mode Voltage mode Both a and b None of the above Hint Chopper or Buck Converter MCQ for Quiz 26). The M/1-2D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Buck boost Hint 27). In which one of the following class choppers the load current is negative? Class A Class B Class C Class D Hint 28). What is the standard form of ZCC? Zero Clamped Current Zero Current Controller Zero Controller Current None of the above Hint 29). The figure shown below is a circuit diagram of _______________ converter? Buck converter Boost converter Buck-boost converter None of the above Hint 30). Which one of the following converters provides lower voltage? Buck converter Boost converter Both a and b None of the above Hint 31). What is the standard form of ZVS? Zero Voltage Semiconductor Zero Voltage Switching Zero Voltage Source None of the above Hint 32). In which one of the following converters the tracking efficiency is low? Buck-boost converter SEPIC converter CUK converter None of the above Hint 33). In which one of the following converters the current measurement is hard? Buck-boost converter SEPIC converter CUK converter None of the above Hint 34). In which one of the following converters, the control requirement is isolated? SEPIC converter CUK converter Buck-boost converter None of the above Hint 35). In which one of the following converters the fluctuations are high? Buck-boost converter SEPIC converter CUK converter None of the above Hint 36). In which one of the following converters, the number of components are low? SEPIC converter CUK converter Buck-boost converter None of the above Hint 37). The figure shown below is a circuit diagram of _______________ converter? Buck converter Boost converter Buck-boost converter None of the above Hint 38). The design and implementation complexity are high in _____________________? NPC FC CHB None of the above Hint 39). What is the standard form of ZCS? Zero Current Semiconductor Zero Current Switching Zero Current Source None of the above Hint 40). In which one of the following converters the large filter is required? Buck converter Buck-boost converter Boost converter Both a and b Hint 41). Which one of the following is a single quadrant chopper? Step-up converter Step-down converter Both a and b None of the above Hint 42). The power density of resonant converter is _______________________? Very low Medium High Low Hint 43). 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 Hint 44). The 1/1-2D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Buck boost Hint 45). Which one of the following is a second quadrant chopper? Class A Class B Class C Class D Hint 46). What is the standard form of ZCV? Zero Clamped Voltage Zero Current Voltage Zero Controller Voltage None of the above Hint 47). The figure shown below is a block diagram of _______________ converter? Buck converter Boost converter Closed loop control for converter None of the above Hint 48). What is the standard form of OCC? One Cycle Control One Cycle Commutator One Controller Cycle None of the above Hint 49). What is the standard form of SRC? Series Resonant Converter Series Resistance Converter Series Reactance Converter None of the above Hint 50). In which one of the following converters the Vout is free? Buck converter Buck-boost converter Boost converter Both a and b Hint Chopper or Buck Converter MCQ for Exams 51). Which one of the following types of choppers is based on circuit operation? Class A First quadrant Voltage commutated Step up chopper Hint 52). Which one of the following choppers functions in first, and second quadrant? Class C Class D Class E None of the above Hint 53). The frequency or time period is constant in _________________ control? PWM control Variable frequency control Current limit control None of the above Hint 54). Which one of the following control methods requires VIN feed forward circuit? Current mode Voltage mode Both a and b None of the above Hint 55). The 1-2D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Buck boost Hint 56). What is the standard form of ZCT? Zero Clamped Transition Zero Current Transition Zero Controller Transition None of the above Hint 57). The power sharing is a control concern in _____________ converter topology? NPC CHB FC None of the above Hint 58). In which one of the following converter topologies the design and implementation complexity is low? NPC CHB FC None of the above Hint 59). What is the standard form of PRC? Parallel Resonant Converter Parallel Resistance Converter Parallel Reactance Converter None of the above Hint 60). Which one of the following is also known as step up chopper? Buck converter Boost converter Both a and b None of the above Hint 61). In which one of the following choppers the inductor is not required? Step-up Step-down Both a and b None of the above Hint 62). The D/1-D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Buck boost Hint 63). The input current is non-pulsating in _________________ converter? Buck converter Boost converter Both a and b None of the above Hint 64). The MPPT region is unbounded in ______________ converter? Buck Boost Buck-boost None of the above Hint 65). 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 Hint Read more about DC to DC Converter 66). Which one of the following is a first quadrant chopper? Class A Class B Class C Class D Hint 67). What is the standard form of ZVT? Zero Voltage Transformer Zero Voltage Transition Zero Voltage Transistor None of the above Hint 68). The voltage balancing is a control concern in _____________ converter topology? NPC CHB Buck None of the above Hint 69). The voltage setup is a control concern in _____________ converter topology? NPC CHB FC None of the above Hint 70). Which one of the following is also known as step down chopper? Buck converter Boost converter Both a and b None of the above Hint 71). Which one of the following choppers functions in first, and fourth quadrant? Class C Class D Class E None of the above Hint 72). The D/1-2D is the voltage gain of the conventional _________________ converter? Z-source Z-H boost Z-H buck Z-H buck boost Hint 73). What is the standard form of GTO? Gate Turnoff Thyristor Gate Turnoff Transformer Gate Turnoff Transistor None of the above Hint 74). The output current is non-pulsating in _________________ converter? Buck converter Boost converter Both a and b None of the above Hint 75). Which one of the following class choppers is also called forward monitoring mode? Class A Class B Class C Class D Hint Chopper or Buck Converter MCQ for Students 76). What is the standard form of CCM? Control Conduction Mode Common Conduction Mode Continuous Conduction Mode None of the above Hint 77). The step-down mechanism is reactive in __________________? Buck converter LDO Both a and b None of the above Hint 78). In which one of the following the noise can be high? Buck converter LDO Both a and b None of the above Hint 79). What is the standard form of NPC? Neutral Point Commutator Neutral Point Controller Neutral Point Clamped None of the above Hint 80). In which one of the following the efficiency and EMI noise is low? Linear regulator Switching regulator Charge pump Both a and b Hint 81). 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 Hint 82). The typical energy efficiency range if chopper is ____________________? 65% to 45% 5% to 45% 15% to 45% 25% to 45% Hint 83). Which one of the following is used for severe plugging? Cutter Chopper Both a and b None of the above Hint 84). Which one of the following choppers functions in first, second, third, and fourth quadrant? Class C Class D Class E None of the above Hint 85). In which one of the following control the T-ON is constant? PWM control Variable frequency control Current limit control None of the above Hint 86). In which one of the following mode the transient response is more complex? Current mode Voltage mode Peak current mode None of the above Hint 87). What is the standard form of DCM? Discontinuous Control Mode Discontinuous Common Mode Discontinuous Conduction Mode None of the above Hint 88). The stepdown mechanism is resistive in _________________? LDO Buck converter Boost converter None of the above Hint 89). What is the standard form of CHB? Commutator H-Bridge Common H-Bridge Cascaded H-Bridge None of the above Hint 90). In which one of the following the solution size is large? Linear regulator Switching regulator Charge pump Both a and b Hint 91). Which one of the following is not retrofittable to existing pumps? Chopper Cutter Both a and b None of the above Hint 92). The dynamic range is narrow in ______________ converter? ZETA Buck Both a and b None of the above Hint 93). The power density of MMC-DAB converter is _______________________? Very low Medium High Low Hint 94). The power range historically used in flyback converter topology is ______________? 50 W – 300 W 500 W 5000 W <100 W Hint 95). The voltage buck converter is also another name of _________________ converter? Boost converter Buck converter Both a and b None of the above Hint 96). Which one of the following converters used in portable device applications? Buck Boost Both a and b None of the above Hint 97). The flyback converter comes under ___________________ converter? Non-isolation Isolation Both a and b None of the above Hint 98). 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 Hint 99). 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 Hint 100). In which one of the following the output current is low to high? Linear regulator Switching regulator Charge pump Both a and b Hint Time's up
