Higher Colleges of Technology Assignment 7 (LOS) Those thermometers utilize the
ID: 2088675 • Letter: H
Question
Higher Colleges of Technology Assignment 7 (LOS) Those thermometers utilize the principle that a rise in fluid temperature causes it to expand or to evaporate: a. Liquid expansion thermometers b. Vapor expansion thermometers c Both of the above 8. Problem 1: Select the most correct answer This temperature transducer utilizes a hot junction and a cold junction, and produces an e.mf proportional to the difference in temperature between the two: 1. d. None of the above b. Resistive Temperature Detector (RTD c Thermistors Those thermometers work on the principle that different metals have different expansion rates. a. Bimetallic thermometers b. Glass thermometer c. Thermocouples d. Expansion thermometers 9. 2. Those temperature detectors utilize the fact that the resistance of a conductor change with temperature: a. Bimetllic thermometers b. Resistance type thermometers c. Thermocouplies d. Expansion thermometers 10. A bimetallic thermometer usually has this many strips of metal bonded together a. 2 3. Thermistors are a special type of this device d. 5 a. Thermocouples b. Bimetallic thermometers c. Resistance type thermometers d. Liquid expansion thermometers 11. A bimetallic thermometer responds to temperature change by a. Expanding or contracting b. Bending ?. Twisting d. None of the above Compared to platinum type sensors, thermistors are: a More expensive but have large temp range b. More expensive but have limited temp range 4. 12. Glass thermometers suffer from this problem Less expensive but have large temp range Less expensive but have limited temp range Brittle and expenslive when accuracy is needed a. b. d. Mercury solidifies at-40°C while alcohol boils at about 120 C These thermometers are filied with a liquid: a. b. c. d. 5. c. Easy to make mistake while reading them d. All of the above Vapor expansion thermometers Lquid expansion thermometens Bimetallic thermometers Thermocouples 13. Thi liquid is usedin geass thermometens a. Mercury for hot and cold temperatures b. Colored alcohol for hot and cold temperatures c. Mercury for hot temperatures and colored alcohol 6 These thermometers are filled with evaporating fluid: a. Bimetallic thermometers b. Thermocouples c. Vapor expansion thermometers d. Liquid expansion thermometers for cold temperatures Mercury for cold temperatures and colored alcohol for hot temperatures. d. The sensor of a glass thermometer is located in this: a? b. c. d. 7. The glass The scale The bulb None of the aboveExplanation / Answer
Problem 1
Answer (1): thermocouple is a temprature transducer utilises a hot junction and a cold junction and produces an EMF to calculate the temprature .
Answer (2): a RTD is a temprature sensor that works on a principle that a material's electric resistance change with the temprature.
Answer(3): Thermistor is a special type of resistance type thermometer which change its physical resistance when exposed to change in temprature.
Answer(4): compare to platinum type sensors , thermisters are less expensive and have limited temprature range between approxx(-100? to 325?).
as you didn't mentioned the question and subparts i solved 4 subparts of your first question.