Pyrometer Question & AnswersApril 18, 2023 By Wat Electrical This article lists 50 Pyrometer MCQs for engineering students. All the Pyrometer Questions & Answers below include a hint and a link to the relevant topic wherever possible. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of the Pyrometer.Pyrometers are devices used for measuring high temperatures. When comparing pyrometers, there are several common detectors that are typically discussed. Some of these detectors include thermocouples, RTDs, thermistors, infrared detectors, and Fiber optic detectors. Thermocouples are the most common detector type used in pyrometers. They are simple, rugged, and inexpensive. However, they have limited accuracy and stability, and their output depends on the temperature gradient between the hot junction and the reference junction. Infrared detectors are based on the principle that all objects emit infrared radiation. They can measure the temperature of an object without physically contacting it. Infrared detectors can provide very accurate temperature measurements, but they are expensive and require a clear line of sight to the object being measured. Fiber-optic detectors use a Fiber-optic cable to transmit the temperature information from the measurement point to the pyrometer. This allows the pyrometer to be located remotely from the measurement point. Fiber-optic detectors can provide accurate measurements, but they are expensive and require careful installation. 1). Which one of the following pyrometer measures brightness temperatures using visible light? Optical pyrometer Radiation pyrometer Thermocouple pyrometer Fixed point black body pyrometer None Hint2). The temperature range of thermocouple detector is between ______________ degrees/centigrade? 10 to 20 50 to 1300 100 to 850 50 to 1500 None Hint3). Which one of the following laws used-to calculate the radiant heat flux emitted by a body at a certain temperature and surface area? Wien's Displacement Law Stefan-Boltzmann Law Radiation View Factor Planck's Law None Hint4). The response time of Fluke 572-2 pyrometer model is ________________ ms? <500 <100 <150 >100 None Hint5). The optical lens are required in ________________ pyrometer? Radiation Contact Infrared Optical None Hint6). The ratio of two intensities is a measurement method of _________________ pyrometer? Optical Radiation Contact Infrared None Hint7). The direct measurement of surface temperature is a temperature measurement method of _____________ pyrometer? Contact Non-contact Short wavelength None of the above None Hint8). Which one of the following pyrometers is based on the type of application? Low temperature pyrometer Medium temperature pyrometer High temperature pyrometer Industrial pyrometer None Hint9). The non-invasive temperature measurement in medicine is an application comes under _______________ pyrometer? Medical Medium temperature Contact Short wavelength None Hint10). Which one of the following pyrometer measures infrared radiations emitted by object? Optical pyrometer Radiation pyrometer Thermocouple pyrometer Fixed point black body pyrometer None Hint11). Which one of the following laws used-to calculate the heat exchange between two surfaces at different temperatures and distances from each other? Wien's Law Stefan-Boltzmann Law Radiation View Factor Planck's Law None Hint12). The response time of Omega OS523E pyrometer model is ________________ ms? <500 <100 <150 >100 None Hint13). The distance to spot ratio is 10:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Amprobe IR608A None Hint14). In which one of the following pyrometers the optical lens is not required? Radiation Contact Both a and b Optical None Hint15). The comparison to black body is a measurement method of _________________ pyrometer? Optical Radiation Contact Infrared None HintPyrometer MCQ for Quiz16). The measurement of the thermal radiation emitted by the surface is a temperature method of _____________ pyrometer? Contact Non-contact Short wavelength None of the above None Hint17). The wavelength range of long wavelength pyrometer is __________________? 0.7 - 1.2 mm 1.2 - 3 mm 3 - 30 mm 10 mm None Hint18). Which one of the following pyrometers is based on the temperature range of measurement? Low temperature pyrometer Industrial pyrometer Scientific pyrometer Short wavelength pyrometer None Hint19). In which one of the following sensors the stability is not good? Thermocouple Pt100 sensor Both a and b None of the above None Hint20). Which one of the following pyrometer measures temperatures through voltage generated by thermocouple? Optical pyrometer Radiation pyrometer Thermocouple pyrometer Fixed point black body pyrometer None Hint21). Which one of the following laws used-to calculate the peak wavelength of the radiation emitted by a blackbody at a certain temperature? Wien's Displacement Law Stefan-Boltzmann Law Radiation View Factor Planck's Law None Hint22). The response time of Raytek RAYMT6U pyrometer model is ________________ ms? <500 <100 <150 >100 None Hint23). The distance to spot ratio is 8:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Raytek RAYMT6U None Hint24). In which one of the following pyrometers, the infrared sensor is required? Radiation Contact Both a and b Infrared None Hint25). The distance to spot ratio not applicable in __________________ pyrometer? Optical Radiation Contact All of the above None Hint26). The emissivity settings adjustable in _____________ pyrometer? Optical Radiation Infrared All of the above None Hint27). The measurement of thermal radiation is a measurement method of _________________ pyrometer? Optical Radiation Contact Infrared None Hint28). The figure shown below is a block diagram of ____________________? Optical pyrometer Radiation pyrometer Infrared pyrometer Both b and c None Hint29). The distance to spot ratio is 30:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Raytek RAYMT6U None Hint30). Which one of the following pyrometers measures the melting point of a material? Optical pyrometer Radiation pyrometer Thermocouple pyrometer Fixed point black body pyrometer None HintPyrometer MCQ for Exams31). The temperature range of Fiber optic detector is between ________ degrees/centigrade? 10 to 20 200 to 3000 100 to 850 50 to 1500 None Hint32). Which one of the following laws used-to calculate the spectral radiance of a blackbody at a certain temperature and wavelength? Wien's Displacement Law Stefan-Boltzmann Law Radiation View Factor Planck's Law None Hint33). The emissivity is adjustable from 0.10 to 1.00 in __________________ pyrometer model? Fluke 572-2 Omega OS523E Raytek RAYMT6U Both a and c None Hint34). The response time is slow in _____________ pyrometer? Optical Radiation Contact All of the above None Hint35). The measurement of voltage is a measurement method of _________________ pyrometer? Optical Radiation Contact Thermocouple None Hint36). The figure shown below is a block diagram of ____________________? Optical pyrometer Radiation pyrometer Infrared pyrometer None of the above None Hint37). The wavelength range of short wavelength pyrometer is __________________? 0.7 - 1.2 micro meter 1.2 - 3 micro meter 3 - 30 micro meter 10 micro meters None Hint38). Which one of the following pyrometers is based on the wavelength range of measurement? Low temperature pyrometer Industrial pyrometer Scientific pyrometer Short wavelength pyrometer None Hint39). In which one of the following sensors, the physical strength is limited? Thermocouple Pt100 sensor Both a and b None of the above None Hint40). The temperature range of RTD detector is between ________ degrees/centigrade? 10 to 20 50 to 1300 100 to 850 50 to 1500 None Hint41). Which one of the following laws used-to calculate the temperature of a blackbody based on the peak wavelength of the radiation emitted? Wien's Law Stefan-Boltzmann Law Radiation View Factor Planck's Law None Hint42). The emissivity is fixed at 0.95 in __________________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Both b and c None Hint43). The distance to spot ratio is 60:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Both b and c None Hint44). The response time is fast in _____________ pyrometer? Contact Radiation Both a and b None of the above None Hint45). The figure shown below is a block diagram of ____________________? Generator Thermometer Pyrometer Thermocouple None Hint46). The wavelength range of medium wavelength pyrometer is __________________? 0.7 - 1.2 micro meter 1.2 - 3 micro meter 3 - 30 micro meter 10 micro meters None Hint47). Which one of the following pyrometers is based on the type of temperature measurement method? Contact pyrometer Long wavelength pyrometer Low temperature pyrometer Short wavelength pyrometer None Hint48). The research and development application comes under ______________ pyrometer? Scientific Long wavelength Contact Non-contact None Hint49). The distance to spot ratio is 50:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Raytek RAYMT6U None Hint50). The temperature range of infrared detector is between ________ degrees/centigrade? 10 to 20 50 to 1300 100 to 850 50 to 1500 None HintFor More MCQsAmmeter Question & AnswersEnergy Meter Question & AnswersQ Meter Question & AnswersTachometer Questions & AnswersAnemometer Questions & Answers Time's up
