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Comparator Question & Answers

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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.

1). How many types of comparators are there?
HintThere are five types of comparators they are mechanical, mechanical-optical, reed-type, electrical, electronic, and pneumatic comparators
2). ___________ are the high sensitive calibration comparators
HintThe Brookes level, Edan Rolt millionth is the highly sensitive calibration comparators
3). What are the advantages of pneumatic comparators?
HintThe pneumatic comparators have less friction, less measuring pressure, and very high magnification
4). What are the advantages of fluid displacement comparators?
HintThe fluid displacement comparators are portable, economic, and their construction is easy
5). Which one is a type of mechanical comparator?
HintThe Johansson mikrakator is a type of mechanical comparator
6). What are the disadvantages of pneumatic comparators?
HintThe pneumatic comparators are non-portable, less sensitive, and requires a compressor
7). Which comparator works on spring, linkages, gear pinions?
HintThe mechanical comparator works on spring, linkages, gear pinions
8). What are the advantages of mechanical optical comparators?
HintThe advantages of mechanical optical comparators are it has high magnification, high range, and high accuracy
9). Which comparator works by using backpressure, valves, and high-pressure air?
HintThe pneumatic comparator works by using backpressure, valves, and high-pressure air
10). How many types of offsets are there?
HintThe offsets are of two types they are random and systematic offsets
11). How many types of multi-check comparators are there?
HintThe multi-check comparators are of three types they are electrical, air, and air electric multi check comparators
12). The mechanical comparators are categorized into _____________
HintThe mechanical comparators are categorized into four types they are reed type, sigma, dial gauge, and Johansson mikrokator comparators
13). Which one of the following is a mechanical optical comparator?
HintThe Zeiss ultra optimeter, Zeiss optotest comparators, Zeiss optimeter are mechanical optical comparators
14). The comparators are used as ___________ gauges
HintThe comparators are used as receiving inspection, working, and final inspection gauges, etc
15). What are the advantages of projection comparators?
HintThe accuracy of projection comparators is high, the optical lever is weightless, and it has a very high magnification
16). Which one of the following comparators works by using step-up and step-down transformers?
HintThe electrical comparators works by using step-up and step-down transformers
17). How many inputs does the comparator have?
HintThe comparators have two inputs
18). What’s the output when the input voltage is greater than the reference voltage?
HintThe output goes high when the input voltage is greater than the reference voltage
19). What are the disadvantages of mechanical optical comparators?
HintThe mechanical optical comparators are large, expensive, and requires a light source
20). Which one of the following comparators works by using digital signal and amplifier?
HintThe electronic comparators work by using digital signal and amplifier
21). What are the disadvantages of projection comparators?
HintThe projection comparators have high magnification and their apparatus size is large and expensive
22). Which one of the following comparators works by using a light source, lens, and mirrors?
HintThe optical comparators works by using a light source, lens, and mirrors
23). How many outputs does the comparator have?
HintThe comparators have one output
24). What’s the output when the input voltage is less than the reference voltage?
HintThe output goes high when the input voltage is less than the reference voltage
25). Which one of the following represents a voltage source in series with a non-inverting input?
HintThe input offset voltage represents as a voltage source in series with a non-inverting input

Comparator MCQ’s for Quiz

26). What are the advantages of mechanical comparators?
HintThe mechanical comparators are portable, cheaper, and robust construction
27). Which one of the following represents a voltage source in series with a non-inverting input?
HintThe input bias current and input offset current represents as a voltage source in series with a non-inverting input
28). Which one of the following represents that the maximum output current that can be sourced or sunk by the output stage?
HintThe output short circuit represents that the maximum output current that can be sourced or sunk by the output stage
29). Which one is an open-drain comparator?
HintThe TLV2302 is an open-drain comparator
30). Which one of the following has input clamps?
HintThe OPA171 has input clamps
31). The TIPD106 precision designs for comparators have bandwidth range of _______
HintThe TIPD106 precision designs for comparators have a bandwidth range of 2KHz to 32MHz
32). Which one of the following describes how to configure an amplifier for hysteresis with a comparator?
HintThe TIPD141 describes how to configure an amplifier for hysteresis with a comparator
33). Which one of the following details the design procedure for a window functionality?
HintThe TIPD178 details the design procedure for a window functionality
34). Which one is a push-pull comparator?
HintThe TLV2702 is a push-pull comparator
35). Which one of the following doesn’t have input clamps?
HintThe OPA2325 don’t have input clamps
36). For a two-bit comparator, the output value of A<B is _________ when inputs A1=A0=B1=B0=0
HintFor a two-bit comparator, the output value of A
37). The low input offset current of LM397 single general-purpose voltage comparator is _______
HintThe low input offset current of LM397 single general-purpose voltage comparator is ±1nA
38).The comparators have _________ propagation delay
HintThe comparators have a low propagation delay
39). When compared to an op-amp the slew rate of the comparator is _______
HintWhen compared to an op-amp the slew rate of the comparator is high
40). When an input is applied to the inverting terminal, in that case, the comparator is known as ________
HintWhen an input is applied to the inverting terminal, in that case, the comparator is known as inverting comparator
41). How many total conditions are required for a one-bit comparator?
HintThe total conditions are required for a one-bit comparator is four
42). For a two-bit comparator, the output value of A=B is _________ when inputs A1=A0=B1=B0=0
HintFor a two-bit comparator, the output value of A=B is one when inputs A1=A0=B1=B0=0
43). If the voltage at the negative terminal is higher than the positive terminal then the output of the comparator will be ________
HintIf the voltage at the negative terminal is higher than the positive terminal then the output of the comparator will be low
44). The comparators have ___________
HintThe comparators have very fast rise and fall time
45). When an input is applied to the non-inverting terminal, in that case, the comparator is known as ________
HintWhen an input is applied to the non-inverting terminal, in that case, the comparator is known as a non-inverting comparator
46). How many equal conditions are required for a one-bit comparator?
HintThe two equal conditions are required for a one-bit comparator
47). How many equal conditions are required for a 2-bit comparator?
HintThe sixteen equal conditions are required for a one 2-bit comparator
48). How many equal conditions are required for a 3-bit comparator?
HintThe 64 equal conditions are required for a one 3-bit comparator
49). The operating temperature range of the LTC1042C window comparator is from __________
HintThe operating temperature range of the LTC1042C window comparator is from -40 deg C to 85 deg C
50). The voltage range of the TPS3701 window comparator is from ___________
HintThe voltage range of the TPS3701 window comparator is from 1.8 to 36V

Comparator MCQ’s for Students

51). How many pins does the LM324 comparator consist of?
HintThe LM324 comparator consists of 14 pins
52). For a two-bit comparator, the output value of A>B is _________ when inputs A1=A0=B1=B0=0
HintFor a two-bit comparator, the output value of A>B is one when inputs A1=A0=B1=B0=0
53). How many equal conditions are required for a 1-bit comparator?
HintThe two equal conditions are required for a 1-bit comparator
54). The operating temperature of the LTC1042M window comparator is from ___________
HintThe operating temperature of the LTC1042M window comparator is from -55 deg C to 125 deg C
55). The LM324 comparator used as _______
HintThe LM324 comparator used as op-amp as well as comparator
56). How many pins does LM393 IC consist of?
HintThe LM393 IC consists of 8 pins
57). The LM397 single generator purpose voltage comparator used in _______
HintThe LM397 single generator purpose voltage comparator used in peak detector, a/d converter, square wave generator, etc
58). How many equal conditions are required for a 2-bit comparator?
HintThe four equal conditions are required for a 2-bit comparator
59). The LM397 single generator purpose voltage comparator operates from _______
HintThe LM397 single generator purpose voltage comparator operates from 5V to 30V
60). For a 1-bit comparator, the output value of A=B is _________ when inputs A=B=0
HintFor a 1-bit comparator, the output value of A=B is one when inputs A=B=0
61). For a 1-bit comparator, the output value of A<B is _________ when inputs A=B=1
HintFor a 1-bit comparator, the output value of A
62). How many un-equal conditions are required for a 1-bit comparator?
HintThe two un-equal conditions are required for a 1-bit comparator
63). How many equal conditions are required for a 3-bit comparator?
HintThe eight equal conditions are required for a 3-bit comparator
64). In which one of the following the comparator can use?
HintIn CPU the comparator can use
65). The TTL74LS85 is a __________ comparator
HintThe TTL74LS85 is a magnitude comparator
66). How many un-equal conditions are required for a 2-bit comparator?
HintThe 12 un-equal conditions are required for a 2-bit comparator
67). For a two-bit comparator, the output value of A<B is _________ when inputs A1=A0=B1=B0=1
HintFor a two-bit comparator, the output value of A
68). The phase comparators are categorized into ___________
HintThe phase comparators are categorized into two types they are vector product and coincidence comparators
69). In which type of comparator both phase and amplitude comparators are used?
HintIn hybrid comparator both phase and amplitude comparators are used
70). How many un-equal conditions are required for a 3-bit comparator?
HintThe 56 un-equal conditions are required for a 3-bit comparator
71). Which comparator compares both the phase and magnitude of the input quantities?
HintThe hybrid comparator compares both the phase and magnitude of the input quantities
72). For a two-bit comparator, the output value of A=B is _________ when inputs A1=A0=B1=B0=1
HintFor a two-bit comparator, the output value of A=B is one when inputs A1=A0=B1=B0=1
73). How many types of digital comparators are there?
HintThere are two types of digital comparators are there they are identity and magnitude
74). The digital comparators are used in _________
HintThe digital comparators are used in both ADC and ALU
75). How many output terminals does the magnitude comparator have?
HintThe magnitude comparator has three output terminals

Comparator MCQ’s Important Questions

76). For a 1-bit comparator, the output value of A>B is _________ when inputs A=0, B=1
HintFor a 1-bit comparator, the output value of A>B is zero when inputs A=0, B=1
77). In air multi check comparators group if _______ comparators are used
HintIn air multi check comparators group if air comparators are used
78). The air multi check comparator checks the ______________
HintThe air multi check comparator checks both connectivity & diameter at a time
79). The sigma comparator is one type of ________ comparator
HintThe sigma comparator is one type of mechanical comparator
80). What are the advantages of a sigma comparator?
HintThe sigma comparators are robust, cheaper, and easy to handle
81). What are the disadvantages of a sigma comparator?
HintThe main disadvantages of a sigma comparator are complicated to design, and there may be a chance of parallax error
82). What are the components used for sigma comparator construction?
HintThe components used for sigma comparator construction are plunger, knife-edge, moving block, fixed block, pointer spindle, pointer, etc
83). What are the advantages of reed type mechanical comparator?
HintThe reed type mechanical comparators are highly sensitive, lightweight, and portable
84). The reed type mechanical comparators magnification is _______
HintThe reed type mechanical comparators magnification is <100
85). In reed type mechanical comparator _________ components are used
HintIn reed type mechanical comparator pointer, scale, blocks, reed, plunger components are used
86). How many reeds are used in a reed type comparator?
HintIn reed type comparator four reeds are used in that two placed horizontally and remaining two are place vertically
87). Which one of the following is also known as a twisted strip comparator?
HintThe Johansson mikrokator is also known as a twisted strip comparator
88). _______ are the components used in Johansson mikrokator comparator
HintThe light pointer, plunger, bell crank lever, twisted strip, cantilever strip are the components used in the Johansson mikrokator comparator
89). The digital indicator accuracy is up to __________
HintThe digital indicator accuracy is up to 0.001mm
90). The digital indicators are categorized into _________
HintThe digital indicators are categorized into two types they are gear & pinion type, and lever type digital indicators
91). ___________ are the main parts of the dial indicator
HintThe indicator, plunger, locking screw, magnification mechanism, mini dial, dial with the main scale are the main parts of the dial indicator
92). Which one of the following comparators works on button spinning on a loop of string principle?
HintThe Johansson mikrokator comparator works on button spinning on a loop of string principle
93). The magnification of the Johansson mikrokator comparator is about _________
HintThe magnification of the Johansson mikrokator comparator is about 5000
94). The magnification of the dial indicator is about _________
HintThe magnification of the dial indicator is about 250 to 1000
95). Which one of the following comparator works on the principle of light of refraction and reflection?
HintThe optical comparator works on the principle of light of refraction and reflection
96). For a backpressure indication, the water manometer is used in ________ comparator
HintFor a backpressure indication, the water manometer is used in a Solex pneumatic comparator
97). For a two-bit comparator, the output value of A=B is _________ when inputs A1=1, A0=0, B1=0, B0=0
HintFor a two-bit comparator, the output value of A=B is zero when inputs A1=1, A0=0, B1=0, B0=0
98). For a 1-bit comparator, the output value of A<B is _________ when inputs A=1, B=0
HintFor a 1-bit comparator, the output value of A
99). The response time of the LM397 single general-purpose voltage comparator is ___________
HintThe response time of the LM397 single general-purpose voltage comparator is 440ns
100). The low input offset voltage of LM397 single general-purpose voltage comparator is _______
HintThe low input offset voltage of LM397 single general-purpose voltage comparator is ±2mv
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