Color pyrometers are used to measure the radiation emitted from the object during the temperature measurement. ITI Trades MCQ: Fitter, Turner, Machinist . (a) 20 Ω (b) 200 Ω (c) 2000 Ω (d) 20000 Ω, (a) Induction type (b) Hot wire type (c) Electrostatic type (d) Moving-iron attraction type. 10 Used for very high temperature measurement 700 degc -3500 degc. placed in contact with the hot body; by proper calibration, this output yields temperature. 24. Set III 19. (a) 1 to 5 (b) 10 to 50 (c) 100 to 500 (d) 1000 to 5000, (a) to provide equal time constant for fixed coil and moving coil, when used for AC measurements (b) to reduce the bulk of the moving coil system (c) to reduce the current flowing through the moving coil (d) to control the deflecting torque. Then the radiation is sent to the detector, which is very sensitive to the waves of radiation. For measuring any temperature above 1200 o C a radiation pyrometer type thermometer is generally used. A dc circuit can be represented by an internal voltage source of 50 V with an output resistance of 100 kΩ. To measure the temperature of moving objects or constant objects from a greater distance. It measures the temperature of a targeted object from the emitted radiation. (a) Weston frequency meter (b) Heterodyne frequency meter (c) Electrical resonance frequency meter (d) Any of the above. Pyrometer also is known as an Infrared thermometer or Radiation thermometer or non-contact thermometer used to detect the temperature of an object’s surface temperature, which depends on the radiation (infrared or visible) emitted from the object. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. These pyrometers are designed to detect thermal radiation in the infrared region, which is usually at a distance of 2-14um. Until microchips and compact electronic equipment became popular in the 1980s, a manual optical pyrometer was what you used if you wanted to measure the temperature of something extremely hot and relatively inaccessible, such as the inside of a steel furnace or a pottery kiln. - Structure & Tuning Methods. Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. c) Stud. ... An electric pyrometer is an instrument used to measure. 7 people answered this MCQ question is the answer among for the mcq Radiation pyrometer is used to measure temperature in the range of 7 people answered this MCQ question is the answer among for the mcq Radiation pyrometer is used to measure temperature in the … Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. The temperature of any material can be measured by using different methods and devices. Based on the spectral range, pyrometers are classified into 1-color pyrometers, 2-color pyrometers, and high-speed pyrometers. Hot air balloons to measure the heat at the top of the ballon, Steam boilers to measure steam temperature. To measure the temperature of liquid metals and highly heated materials. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. According to the physical property of the material, the temperature can be measured by using these methods like thermometers (liquid in glass), electric resistance thermometer, radiation thermometer/ infrared thermometers/ pyrometers, thermocouple, silicon diode, bimetallic devices, bulb and capillary devices, constant volume gas, and pressure gas thermometers. (a) at the maximum of the scale (b) at the middle of the scale (c) near the initial zone of the scale. Your email address will not be published. a) Resistance pyrometer b) Radiation pyrometer c) Infra red pyrometer d) Optical pyrometer 18. 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(a) optical inputs (b) thermal radiations (c) electrical signals (d) temperature inputs. Accuracy of the device can be affected due to the different conditions like dust, smoke, and thermal radiation. Which of the following instrument is used to measure accurately the ange of taper? Pyrometers are available in different spectral ranges ( since metals – short wave ranges and non-metals-long wave ranges). These can measure the object’s temperature very accurately. a) Fuel substitution b) Monitoring and verification c) Energy pricing d) Bench marking: 16: Infrared thermometer is used to measure. Thermocouple pyrometers measure the output of a thermocouple (q.v.) - question 2751 ... is used to measure electrical resistance in ohms ... is used to measure frequency of electromagnetic waves, Pyrometer - is used to measure very high temperature. Molten glass and molten metals during casting and shaping operations are typical of the objects they measure. (a) hot wire instrument (b) dynamometer type moving coil instrument (c) attraction type moving iron instrument (d) electrostatic type instrument. The radiated energy is used for detecting the temperature of the object and it is converted into electrical signals with the help of a detector. Positioning controllers are used for a) Low loads b) Temperature changes c) Flow rate changes d) High loads 20. Is a unit of latent heat measurement: C. Is thermal conductivity of materials: D. Is quantity of heat required to raise temperature of one tonne of water from 14.5?C to 15.5?C: E. Is the temperature change in water when 1000 calories of heat are added to 1 … These are available in series of Metis M3 and H3 and handheld portables Capella C3 in different versions. To detect the different object’s temperature, pyrometers are classified into 2 types. The device actually tracks and measures the amount of heat that is radiated from an object. 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