Comparator Question & Answers July 19, 2021 By WatElectronics This article lists 100 Comparator MCQs for engineering students. All the Comparator Questions & Answers given below includes solution and link wherever possible to the relevant topic. A comparator has two inputs, two power supply pins, and one output. From a schematic perspective, the comparator looks the same as an op-amp, but the function of the comparator is quite different. They are used as receiving inspection gauges, working gauges, final inspection gauges, etc. There are five types of comparators they are mechanical, mechanical-optical, reed-type, electrical, electronic, and pneumatic comparators. The Brookes level and Edan Rolt millionth are highly sensitive calibration comparators. The pneumatic comparator works by using backpressure, valves, and high-pressure air. These comparators have less friction, less measuring pressure, and very high magnification, and the disadvantages are they are non-portable, less sensitive, and require a compressor. The Johansson Mikrakator is a type of mechanical comparator and this comparator works on spring, linkages, gear pinions. The disadvantages of this comparator are they are large, expensive, requires a light source and the advantages is they are portable, cheaper, has high magnification, high range, high accuracy, and robust construction. 1). How many types of comparators are there? One Two Three Five Hint 2). ___________ are the high sensitive calibration comparators Brookes level Edan Rolt millionth Both a and b None of the above Hint 3). What are the advantages of pneumatic comparators? Less friction Less measuring pressure Very high magnification All of the above Hint 4). What are the advantages of fluid displacement comparators? Construction is easy Economic Portable All of the above Hint 5). Which one is a type of mechanical comparator? Johansson mikrakator Optical lever Zeiss optimeter None of the above Hint 6). What are the disadvantages of pneumatic comparators? Non-portable Less sensitivity Requires compressor All of the above Hint 7). Which comparator works on spring, linkages, gear pinions? Mechanical Pneumatic Optical None of the above Hint 8). What are the advantages of mechanical optical comparators? High magnification High range High accuracy All of the above Hint 9). Which comparator works by using backpressure, valves, and high-pressure air? Johansson mikrakator Optical lever Zeiss optimeter Pneumatic Hint 10). How many types of offsets are there? One Two Three Five Hint 11). How many types of multi-check comparators are there? One Two Three Five Hint 12). The mechanical comparators are categorized into _____________ One Two Three Four Hint 13). Which one of the following is a mechanical optical comparator? Zeiss ultra optimeter Zeiss optotest comparators Zeiss optimeter All of the above Hint 14). The comparators are used as ___________ gauges Receiving inspection Working gauges Final inspection All of the above Hint 15). What are the advantages of projection comparators? Accuracy is high Has very high magnification Optical lever is weightless All of the above Hint 16). Which one of the following comparators works by using step-up and step-down transformers? Electrical Electronic Mechanical All of the above Hint 17). How many inputs does the comparator have? One Two Three Four Hint 18). What’s the output when the input voltage is greater than the reference voltage? High Low Zero None of the above Hint 19). What are the disadvantages of mechanical optical comparators? Large Expensive Requires light source All of the above Hint 20). Which one of the following comparators works by using digital signal and amplifier? Electrical Electronic Mechanical All of the above Hint 21). What are the disadvantages of projection comparators? Has high magnification Size of the apparatus large and expensive Both a and b None of the above Hint 22). Which one of the following comparators works by using a light source, lens, and mirrors? Electrical Electronic Mechanical Optical Hint 23). How many outputs does the comparator have? One Two Three Four Hint 24). What’s the output when the input voltage is less than the reference voltage? High Low Zero None of the above Hint 25). Which one of the following represents a voltage source in series with a non-inverting input? Input offset voltage Input bias current Input common-mode voltage range None of the above Hint Comparator MCQ’s for Quiz 26). What are the advantages of mechanical comparators? Portable Cheaper Robust construction All of the above Hint 27). Which one of the following represents a voltage source in series with a non-inverting input? Input offset voltage Input bias current Input offset current Both b and c Hint 28). Which one of the following represents that the maximum output current that can be sourced or sunk by the output stage? Input offset voltage Input bias current Input offset current Output short circuit Hint 29). Which one is an open-drain comparator? TLV2302 TLV2702 Both a and b None of the above Hint 30). Which one of the following has input clamps? OPA171 OPA2325 OPA350 None of the above Hint 31). The TIPD106 precision designs for comparators have bandwidth range of _______ 2KHz to 60MHz 7KHz to 60MHz 9KHz to 60MHz 2KHz to 32MHz Hint 32). Which one of the following describes how to configure an amplifier for hysteresis with a comparator? TIPD106 TIPD141 TIPD178 None of the above Hint 33). Which one of the following details the design procedure for a window functionality? TIPD106 TIPD141 TIPD178 None of the above Hint 34). Which one is a push-pull comparator? TLV2302 TLV2702 Both a and b None of the above Hint 35). Which one of the following doesn’t have input clamps? OPA171 OPA2325 OPA172 None of the above Hint 36). For a two-bit comparator, the output value of A<B is _________ when inputs A1=A0=B1=B0=0 Zero One Infinity None of the above Hint 37). The low input offset current of LM397 single general-purpose voltage comparator is _______ ±1nA ±2nA ±25nA ±12nA Hint 38).The comparators have _________ propagation delay High Low Very high None of the above Hint 39). When compared to an op-amp the slew rate of the comparator is _______ High Low Very low None of the above Hint 40). When an input is applied to the inverting terminal, in that case, the comparator is known as ________ Inverting comparator Non-inverting comparator Both a and b None of the above Hint 41). How many total conditions are required for a one-bit comparator? One Two Four Eight Hint 42). For a two-bit comparator, the output value of A=B is _________ when inputs A1=A0=B1=B0=0 Zero One Infinity None of the above Hint 43). If the voltage at the negative terminal is higher than the positive terminal then the output of the comparator will be ________ High Low Very high None of the above Hint 44). The comparators have ___________ Very fast rise and fall time Only rise time Only fall time None of the above Hint 45). When an input is applied to the non-inverting terminal, in that case, the comparator is known as ________ Inverting comparator Non-inverting comparator Both a and b None of the above Hint 46). How many equal conditions are required for a one-bit comparator? One Two Four Eight Hint 47). How many equal conditions are required for a 2-bit comparator? One Two Four Sixteen Hint 48). How many equal conditions are required for a 3-bit comparator? One Two Sixty-four Sixteen Hint 49). The operating temperature range of the LTC1042C window comparator is from __________ -40 deg C to 85 deg C -40 deg C to 200 deg C -40 deg C to 100 deg C None of the above Hint 50). The voltage range of the TPS3701 window comparator is from ___________ 1 to 36V 6 to 36V 1.8 to 36V 19 to 36V Hint Comparator MCQ’s for Students 51). How many pins does the LM324 comparator consist of? 2 4 14 16 Hint 52). For a two-bit comparator, the output value of A>B is _________ when inputs A1=A0=B1=B0=0 Zero One Infinity None of the above Hint 53). How many equal conditions are required for a 1-bit comparator? 6 2 64 32 Hint 54). The operating temperature of the LTC1042M window comparator is from ___________ )-55 deg C to 85 deg C -40 deg C to 200 deg C -55 deg C to 125 deg C None of the above Hint 55). The LM324 comparator used as _______ Op-amp Comparator Both a and b None of the above Hint 56). How many pins does LM393 IC consist of? 2 pins 4 pins 8 pins 14 pins Hint 57). The LM397 single generator purpose voltage comparator used in _______ Peak detector A/D converter Square wave generator All of the above Hint 58). How many equal conditions are required for a 2-bit comparator? 6 2 4 32 Hint 59). The LM397 single generator purpose voltage comparator operates from _______ 5V to 30V 15V to 30V 50V to 300V 0.5V to 30V Hint 60). For a 1-bit comparator, the output value of A=B is _________ when inputs A=B=0 Zero One Infinity None of the above Hint 61). For a 1-bit comparator, the output value of A<B is _________ when inputs A=B=1 Zero One Infinity None of the above Hint 62). How many un-equal conditions are required for a 1-bit comparator? 6 2 4 32 Hint 63). How many equal conditions are required for a 3-bit comparator? 6 2 64 8 Hint 64). In which one of the following the comparator can use? Motherboard CPU Mouse None of the above Hint 65). The TTL74LS85 is a __________ comparator Digital Magnitude Phase None of the above Hint 66). How many un-equal conditions are required for a 2-bit comparator? 6 12 4 32 Hint 67). For a two-bit comparator, the output value of A<B is _________ when inputs A1=A0=B1=B0=1 Zero One Infinity None of the above Hint 68). The phase comparators are categorized into ___________ One Two Three Four Hint 69). In which type of comparator both phase and amplitude comparators are used? Magnitude Vector Hybrid None of the above Hint 70). How many un-equal conditions are required for a 3-bit comparator? 6 12 56 32 Hint 71). Which comparator compares both the phase and magnitude of the input quantities? Magnitude Vector Hybrid None of the above Hint 72). For a two-bit comparator, the output value of A=B is _________ when inputs A1=A0=B1=B0=1 Zero One Infinity None of the above Hint 73). How many types of digital comparators are there? One Two Three Four Hint 74). The digital comparators are used in _________ ADC ALU Both a and b None of the above Hint 75). How many output terminals does the magnitude comparator have? One Two Three Four Hint Comparator MCQ’s Important Questions 76). For a 1-bit comparator, the output value of A>B is _________ when inputs A=0, B=1 Zero One Infinity None of the above Hint 77). In air multi check comparators group if _______ comparators are used Air Hybrid Both a and b None of the above Hint 78). The air multi check comparator checks the ______________ Connectivity Diameter Both a and b None of the above Hint 79). The sigma comparator is one type of ________ comparator Electronic Electrical Mechanical None of the above Hint 80). What are the advantages of a sigma comparator? Robust Cheaper Easy to handle All of the above Hint 81). What are the disadvantages of a sigma comparator? Design is complicated Parallax error can occur Both a and b None of the above Hint 82). What are the components used for sigma comparator construction? Plunger, knife-edge Moving block, fixed block Pointer spindle, pointer All of the above Hint 83). What are the advantages of reed type mechanical comparator? Highly sensitive Lightweight Portable All of the above Hint 84). The reed type mechanical comparators magnification is _______ >100 <100 <500 >500 Hint 85). In reed type mechanical comparator _________ components are used Pointer, scale Blocks, reed Plunger All of the above Hint 86). How many reeds are used in a reed type comparator? One Two Three Four Hint 87). Which one of the following is also known as a twisted strip comparator? Reed type Hybrid type Johansson mikrokator None of the above Hint 88). _______ are the components used in Johansson mikrokator comparator Light pointer, plunger Bell crank lever, twisted strip Cantilever strip All of the above Hint 89). The digital indicator accuracy is up to __________ 0.001mm 0.9mm 4mm 12mm Hint 90). The digital indicators are categorized into _________ One Two Three Four Hint 91). ___________ are the main parts of the dial indicator Indicator, plunger Locking screw, magnification mechanism Mini dial, dial with the main scale All of the above Hint 92). Which one of the following comparators works on button spinning on a loop of string principle? Reed type Hybrid type Johansson mikrokator None of the above Hint 93). The magnification of the Johansson mikrokator comparator is about _________ 2000 1000 2300 5000 Hint 94). The magnification of the dial indicator is about _________ 250 to 1000 10 to 1000 500 to 1000 None of the above Hint 95). Which one of the following comparator works on the principle of light of refraction and reflection? Reed type Hybrid type Johansson mikrokator Optical Hint 96). For a backpressure indication, the water manometer is used in ________ comparator Reed type Hybrid type Johansson mikrokator Solex pneumatic Hint 97). For a two-bit comparator, the output value of A=B is _________ when inputs A1=1, A0=0, B1=0, B0=0 Zero One Infinity None of the above Hint 98). For a 1-bit comparator, the output value of A<B is _________ when inputs A=1, B=0 Zero One Infinity None of the above Hint 99). The response time of the LM397 single general-purpose voltage comparator is ___________ 440ns 550ns 890ns 990ns Hint 100). The low input offset voltage of LM397 single general-purpose voltage comparator is _______ ±52mv ±2mv ±25mv ±12mv Hint Read more about Comparator Time is Up! Time's up
