Optical Encoder Question & Answers August 10, 2022 By WatElectronics This article lists 50 Optical Encoder MCQs for Engineering Students. The Optical Encoder Questions & Answers below include solutions and links to the relevant topic. This is helpful for users who are preparing for their exams and interviews, or professionals who would like to brush up on the fundamentals of the Optical Encoder. An optical encoder is a sensor that is used to measure linear displacement or angular displacement. An optical means light sensing and the encoder means the output will be in digital format. The classification of an optical encoder is categorized into two types they are incremental encoder and absolute encoder. An incremental encoder is one type of optical encoder that can be a single tract encoder or multi-track encoder. The main disadvantage of a single-track incremental encoder is we cannot say whether it is clockwise or anti-clockwise by looking at the output. The incremental encoders are simple, low cost, have a lower resolution, homing needed for positioning, and position not retained after power loss. The absolute encoders are complex, expensive, have higher resolution, no homing is needed for positioning, and position is retained after power loss. The light source, photodetector, and code disk (opaque disk) are the components of an optical encoder. In an incremental optical encoder, the resolution can be increased by reading both falling edges and rising edges. An absolute optical encoder measures the rotational displacement that can be measured per bit change. 1). The incremental encoder speed resolution depends on _____________ factors? Number of windows N Sampling period T Clock frequency f All of the above Hint 2). Which one of the following one process the inputs? Encoder Decoder Both a and b None of the above Hint Read more about Encoder and Decoder 3). Which one of the following is an example for odd parity bit? 1000000 (1) 1111101 (0) 1001001 (0) None of the above Hint 4). In which one of the following type optical encoder the signal accuracy is high? Reflective Transmissive Both a and b None of the above Hint 5). What is the unit of derived unit illumination? Meter per second squared lux Radian per second squared Farad Hint 6). The shaft encoders are categorized into ________ types? One Two Three Four Hint 7). Which one of the following components determines the optical encoder type? Code disk Light source Photo detector All of the above Hint 8). The motor encoders are categorized into _________________ types? Two Three Four Five Hint 9). Which one of the following is a type of encoder technology? Linear encoders Optical encoders Incremental encoders All of the above Hint 10). How many types of transducers are there? One Two Three Four Hint 11). How many inputs are given to the below block diagram? One Four Three Eight Hint 12). In which one of the following type optical encoder the contamination resistance is low? Reflective Transmissive Both a and b None of the above Hint 13). In which one of the following encoders, the precision is high? Optical Magnetic Both a and b None of the above Hint 14). Which one of the following error depends on digital word size? Quantization Assembly Coupling None of the above Hint 15). What is the unit of quantity viscosity, dynamic? Newton second per square meter Joule per kilogram kelvin Radian per second squared Farad Hint 16). The figure shown below is a block diagram of measurement and display of rotary displacement using the ____________________? Encoder Potentiometer Resolver None of the above Hint 17). Which one of the following errors occur due to instability in rotational motion of clock disk? Quantization Assembly Coupling None of the above Hint 18). Which one of the following comes under structural limitations? Disk deformation Physical loads on shaft Both a and b None of the above Hint 19). What is the unit of quantity specific heat? Meter per second squared Joule per kilogram kelvin Radian per second squared Farad Hint 20). What is the standard form of LVDTs? Linear Variable Differential Transformers Linear Variable Diffusion Transformers Linear Variable Digital Transformers None of the above Hint Optical Encoder MCQs for Students 21). What is the unit of derived unit angular acceleration? Meter per second squared Disintegration per second Radian per second squared None of the above Hint 22). Which one of the following comes under ambient effects? Vibration Temperature Both a and b None of the above Hint 23). Which one of the following comes under manufacturing tolerance? Sensor position Temperature Both a and b None of the above Hint 24). Which one of the following comes under coupling error? Sensor position Temperature Both a and b Gear backlash Hint 25). What is the unit of derived unit angular velocity? Meter per second squared Disintegration per second Radian per second squared Radian per second Hint 26). The figure shown below is a block diagram of measurement and display of rotary displacement using the ____________________? Encoder Decoder Resolver None of the above Hint 27). Which one of the following is a transmissive type encoder? Optical rotary encoder Optical linear encoder Both a and b None of the above Hint 28). Which one of the following LVDT unit cost is high? DC LVDT AC LVDT Both a and b None of the above Hint 29). Which one of the following is a type of transducer? Proximity Switches Encoders Potentiometers All of the above Hint 30). Which one of the following is used to control and also used for measurement? Encoders Potentiometers Inductive transducers All of the above Hint Optical Encoder MCQs forExams 31). What is the unit of activity (of a radioactive source)? Meter per second squared Disintegration per second Radian per second squared None of the above Hint 32). Which one of the following has long life time? LAMP LED Both a and b None of the above Hint 33). In which one of the following encoders, the resolution is high? Optical Magnetic Both a and b None of the above Hint 34). How many inputs are given to the below circuit diagram? One Four Three Eight Hint 35). What is the unit of electric capacitance? Meter per second squared Disintegration per second Radian per second squared Farad Hint 36). Which one of the following one generates the generates? Encoder Decoder Both a and b None of the above Hint 37). When three-bit messages are zero then the even parity bit generator is equal to ________________? Zero One Zero or one Two Hint 38). Which one of the following encoders are smaller in size and light weight? Optical Magnetic Both a and b None of the above Hint 39). In absolute optical encoders the resolution is equal to _________________? 360 deg 360 deg/2^n 360 deg/n None of the above Hint 40). What is the unit of derived unit acceleration? Meter per second squared Disintegration per second Radian per second squared None of the above Hint Optical Encoder MCQs for Quiz 41). The figure shown below is a block diagram of measurement and display of rotary displacement using the ____________________? Encoder Decoder Resolver None of the above Hint 42). What are the disadvantages of reflective encoder? Low signal accuracy Low contamination resistance Simple assembly process Both a and b Hint 43). Which one of the following encoders are environmental resistance? Optical Magnetic Both a and b None of the above Hint 44). Which one of the following is an example for even parity bit? 1000000 (1) 1111101 (1) 1001001 (0) None of the above Hint 45). What is the unit of electric potential difference? Meter per second squared Volt Radian per second squared Farad Hint 46). In which one of the following the maximum operating temperature is 200 degrees Fahrenheit? LAMP LED Both a and b None of the above Hint 47). What are the advantages of reflective encoder? Low signal accuracy Low contamination resistance Simple assembly process All of the above Hint 48). In which one of the following the optical encoders are used? Joints of robot arm Doors of elevator Printers All of the above Hint 49). Which one of the following is a reflective type encoder? Optical rotary encoder Optical linear encoder Both a and b None of the above Hint 50). In an incremental optical encoders the resolution is equal to _________________? 360 deg 360 deg/2n 360 deg/n None of the above Hint For More MCQs Encoder and Decoder Question and Answers Please fill in the comment box below. Time is Up! Time's up
