Pyrometer Question & Answers April 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 Hint 2). The temperature range of thermocouple detector is between ______________ degrees/centigrade? 10 to 20 50 to 1300 100 to 850 50 to 1500 Hint 3). 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 Hint 4). The response time of Fluke 572-2 pyrometer model is ________________ ms? <500 <100 <150 >100 Hint 5). The optical lens are required in ________________ pyrometer? Radiation Contact Infrared Optical Hint 6). The ratio of two intensities is a measurement method of _________________ pyrometer? Optical Radiation Contact Infrared Hint 7). The direct measurement of surface temperature is a temperature measurement method of _____________ pyrometer? Contact Non-contact Short wavelength None of the above Hint 8). Which one of the following pyrometers is based on the type of application? Low temperature pyrometer Medium temperature pyrometer High temperature pyrometer Industrial pyrometer Hint 9). The non-invasive temperature measurement in medicine is an application comes under _______________ pyrometer? Medical Medium temperature Contact Short wavelength Hint 10). Which one of the following pyrometer measures infrared radiations emitted by object? Optical pyrometer Radiation pyrometer Thermocouple pyrometer Fixed point black body pyrometer Hint 11). 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 Hint 12). The response time of Omega OS523E pyrometer model is ________________ ms? <500 <100 <150 >100 Hint 13). The distance to spot ratio is 10:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Amprobe IR608A Hint 14). In which one of the following pyrometers the optical lens is not required? Radiation Contact Both a and b Optical Hint 15). The comparison to black body is a measurement method of _________________ pyrometer? Optical Radiation Contact Infrared Hint Pyrometer MCQ for Quiz 16). 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 Hint 17). The wavelength range of long wavelength pyrometer is __________________? 0.7 - 1.2 mm 1.2 - 3 mm 3 - 30 mm 10 mm Hint 18). Which one of the following pyrometers is based on the temperature range of measurement? Low temperature pyrometer Industrial pyrometer Scientific pyrometer Short wavelength pyrometer Hint 19). In which one of the following sensors the stability is not good? Thermocouple Pt100 sensor Both a and b None of the above Hint 20). Which one of the following pyrometer measures temperatures through voltage generated by thermocouple? Optical pyrometer Radiation pyrometer Thermocouple pyrometer Fixed point black body pyrometer Hint 21). 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 Hint 22). The response time of Raytek RAYMT6U pyrometer model is ________________ ms? <500 <100 <150 >100 Hint 23). The distance to spot ratio is 8:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Raytek RAYMT6U Hint 24). In which one of the following pyrometers, the infrared sensor is required? Radiation Contact Both a and b Infrared Hint 25). The distance to spot ratio not applicable in __________________ pyrometer? Optical Radiation Contact All of the above Hint 26). The emissivity settings adjustable in _____________ pyrometer? Optical Radiation Infrared All of the above Hint 27). The measurement of thermal radiation is a measurement method of _________________ pyrometer? Optical Radiation Contact Infrared Hint 28). The figure shown below is a block diagram of ____________________? Optical pyrometer Radiation pyrometer Infrared pyrometer Both b and c Hint 29). The distance to spot ratio is 30:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Raytek RAYMT6U Hint 30). Which one of the following pyrometers measures the melting point of a material? Optical pyrometer Radiation pyrometer Thermocouple pyrometer Fixed point black body pyrometer Hint Pyrometer MCQ for Exams 31). The temperature range of Fiber optic detector is between ________ degrees/centigrade? 10 to 20 200 to 3000 100 to 850 50 to 1500 Hint 32). 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 Hint 33). The emissivity is adjustable from 0.10 to 1.00 in __________________ pyrometer model? Fluke 572-2 Omega OS523E Raytek RAYMT6U Both a and c Hint 34). The response time is slow in _____________ pyrometer? Optical Radiation Contact All of the above Hint 35). The measurement of voltage is a measurement method of _________________ pyrometer? Optical Radiation Contact Thermocouple Hint 36). The figure shown below is a block diagram of ____________________? Optical pyrometer Radiation pyrometer Infrared pyrometer None of the above Hint 37). 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 Hint 38). Which one of the following pyrometers is based on the wavelength range of measurement? Low temperature pyrometer Industrial pyrometer Scientific pyrometer Short wavelength pyrometer Hint 39). In which one of the following sensors, the physical strength is limited? Thermocouple Pt100 sensor Both a and b None of the above Hint 40). The temperature range of RTD detector is between ________ degrees/centigrade? 10 to 20 50 to 1300 100 to 850 50 to 1500 Hint 41). 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 Hint 42). The emissivity is fixed at 0.95 in __________________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Both b and c Hint 43). The distance to spot ratio is 60:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Both b and c Hint 44). The response time is fast in _____________ pyrometer? Contact Radiation Both a and b None of the above Hint 45). The figure shown below is a block diagram of ____________________? Generator Thermometer Pyrometer Thermocouple Hint 46). 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 Hint 47). 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 Hint 48). The research and development application comes under ______________ pyrometer? Scientific Long wavelength Contact Non-contact Hint 49). The distance to spot ratio is 50:1 in ______________ pyrometer model? Fluke 572-2 Omega OS523E Extech 42512 Raytek RAYMT6U Hint 50). The temperature range of infrared detector is between ________ degrees/centigrade? 10 to 20 50 to 1300 100 to 850 50 to 1500 Hint For More MCQs Ammeter Question & Answers Energy Meter Question & Answers Q Meter Question & Answers Tachometer Questions & Answers Anemometer Questions & Answers Time's up
