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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?

Hint
2). The position of switch in step up chopper is in ______________?

Hint
3). _____________________ are the low power applications used in chopper?

Hint
4). Which one of the following types of choppers is based on input and output voltage levels?

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5). Which one of the following choppers used for monitoring operation and for motor load?

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6). The buck converter comes under ______________ converter?

Hint
7). Which one of the following converters used in data communication system?


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8). During fault conditions of load the di/dt is limited by industry in ________________ converter?

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9). The current boost converter is also another name of _________________ converter?

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10). In which one of the following converters the input current is discontinuous in nature?

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11). Which one of the following converters steps up the average output current?

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12). Which one of the following switches is open to configuration?

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13). The power range historically used in active clamp forward topology is ______________?

Hint
14). The power density of two-level DAB converter is _______________________?

Hint
15). The power density of DC-MMC converter is _______________________?

Hint
16). The conversion type of linear regulators and LDOs is ____________________?

Hint
17). What is the standard form of SCALDO?

Hint
18). The operating temperature range of super capacitors is ________________?

Hint
19). The figure shown below is a circuit diagram of _______________ converter?

Circuit Diagram of Buck-Boost Converter

Hint
20). Which one of the following converters provides higher current?

Hint
21). Which one of the following types of choppers is based on commutation method?

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22). The power density of super capacitors is _________________ W/Kg?

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23). The voltage gain is less than one or greater than one in ______________ converter?

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24). In which one of the following control the T-ON is variable?

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25). Which one of the following control methods requires current limiting circuitry?

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Chopper or Buck Converter MCQ for Quiz

26). The M/1-2D is the voltage gain of the conventional _________________ converter?

Hint
27). In which one of the following class choppers the load current is negative?

Hint
28). What is the standard form of ZCC?

Hint
29). The figure shown below is a circuit diagram of _______________ converter?

Circuit Diagram of Buck Converter

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30). Which one of the following converters provides lower voltage?

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31). What is the standard form of ZVS?

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32). In which one of the following converters the tracking efficiency is low?

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33). In which one of the following converters the current measurement is hard?

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34). In which one of the following converters, the control requirement is isolated?

Hint
35). In which one of the following converters the fluctuations are high?

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36). In which one of the following converters, the number of components are low?

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37). The figure shown below is a circuit diagram of _______________ converter?

Circuit Diagram of Boost Converter

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38). The design and implementation complexity are high in _____________________?

Hint
39). What is the standard form of ZCS?

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40). In which one of the following converters the large filter is required?

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41). Which one of the following is a single quadrant chopper?

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42). The power density of resonant converter is _______________________?

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43). Which one of the following control strategy the design of an output filter for continuous current operation is easy?

Hint
44). The 1/1-2D is the voltage gain of the conventional _________________ converter?

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45). Which one of the following is a second quadrant chopper?

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46). What is the standard form of ZCV?

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47). The figure shown below is a block diagram of _______________ converter?

Block Diagram of Closed Loop Control for Converters

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48). What is the standard form of OCC?

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49). What is the standard form of SRC?

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50). In which one of the following converters the Vout is free?

Hint

Chopper or Buck Converter MCQ for Exams

51). Which one of the following types of choppers is based on circuit operation?

Hint
52). Which one of the following choppers functions in first, and second quadrant?

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53). The frequency or time period is constant in _________________ control?

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54). Which one of the following control methods requires VIN feed forward circuit?

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55). The 1-2D is the voltage gain of the conventional _________________ converter?

Hint
56). What is the standard form of ZCT?

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57). The power sharing is a control concern in _____________ converter topology?

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58). In which one of the following converter topologies the design and implementation complexity is low?

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59). What is the standard form of PRC?

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60). Which one of the following is also known as step up chopper?

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61). In which one of the following choppers the inductor is not required?

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62). The D/1-D is the voltage gain of the conventional _________________ converter?

Hint
63). The input current is non-pulsating in _________________ converter?

Hint
64). The MPPT region is unbounded in ______________ converter?

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65). In which one of the following DC-DC converters the energy transfer is bi-directional?

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Read more about DC to DC Converter
66). Which one of the following is a first quadrant chopper?

Hint
67). What is the standard form of ZVT?

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68). The voltage balancing is a control concern in _____________ converter topology?

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69). The voltage setup is a control concern in _____________ converter topology?

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70). Which one of the following is also known as step down chopper?

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71). Which one of the following choppers functions in first, and fourth quadrant?

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72). The D/1-2D is the voltage gain of the conventional _________________ converter?

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73). What is the standard form of GTO?

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74). The output current is non-pulsating in _________________ converter?

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75). Which one of the following class choppers is also called forward monitoring mode?

Hint

Chopper or Buck Converter MCQ for Students

76). What is the standard form of CCM?

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77). The step-down mechanism is reactive in __________________?

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78). In which one of the following the noise can be high?

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79). What is the standard form of NPC?

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80). In which one of the following the efficiency and EMI noise is low?

Hint
81). In which one of the following choppers the power flows always from source to load?

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82). The typical energy efficiency range if chopper is ____________________?

Hint
83). Which one of the following is used for severe plugging?

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84). Which one of the following choppers functions in first, second, third, and fourth quadrant?

Hint
85). In which one of the following control the T-ON is constant?

Hint
86). In which one of the following mode the transient response is more complex?

Hint
87). What is the standard form of DCM?

Hint
88). The stepdown mechanism is resistive in _________________?

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89). What is the standard form of CHB?

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90). In which one of the following the solution size is large?

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91). Which one of the following is not retrofittable to existing pumps?

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92). The dynamic range is narrow in ______________ converter?

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93). The power density of MMC-DAB converter is _______________________?

Hint
94). The power range historically used in flyback converter topology is ______________?

Hint
95). The voltage buck converter is also another name of _________________ converter?

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96). Which one of the following converters used in portable device applications?

Hint
97). The flyback converter comes under ___________________ converter?

Hint
98). Which one of the following choppers used for regenerative braking for motor load?

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99). Which one of the following types of choppers is based on directions of output voltage and current?

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100). In which one of the following the output current is low to high?

Hint
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