Transducers part 1.pdf

1. What is the principle behind the operation of strain gauges/load cells? A. Change in electrical current B. Change in electrical voltage C. Change in electrical resistance D. Change in electrical power 2. What is the main application of load cells? A. Measuring temperatur...

1. What is the principle behind the operation of strain gauges/load cells? A. Change in electrical current B. Change in electrical voltage C. Change in electrical resistance D. Change in electrical power 2. What is the main application of load cells? A. Measuring temperature B. Measuring pressure C. Measuring flow rate D. Measuring force and weight 3. What is the primary function of an LVDT? A. Measure vibration B. Measure pressure C. Measure linear displacement D. Measure temperature 4. What does an accelerometer measure? A. The mass of a structure B. The force applied to a structure C. The velocity of a structure D. The vibration of motion of a structure 5. What is the principle behind the operation of an accelerometer? A. Newton's Second Law of Motion B. Einstein's Theory of Relativity C. Newton's First Law of Motion D. Newton's Third Law of Motion 6. How does a Capacitive MEMS Accelerometer detect acceleration? A. By exploiting the movement of a seismic mass, resulting in a capacitance change  B. By generating an electric charge from mechanical stress C. By measuring the force applied to a material D. By exploiting the movement of a seismic mass, resulting in a resistance change 7. What is the principle behind the Piezoelectric effect? A. Generating electric charge from light stress B. Generating electric charge from thermal stress C. Generating electric charge from mechanical stress D. Generating electric charge from electromagnetic stress 8. What is the primary function of a Water Flow Sensor? A. To measure the barometric pressure B. To detect water drops and rainfall C. To measure the rate of flow of liquids D. To monitor atmospheric pressure 9. What is the mechanism used in a Water Flow Sensor to measure fluid flow? A. Electrical and thermal subsystems B. Mechanical and hydraulic subsystems C. Mechanical and electrical subsystems D. Electronic and hydraulic subsystems 10. What is the output of a Rain Sensor? A. Digital only B. Analog only C. Both analog and digital D. None of the above 11. What is the principle behind the operation of a Rain Sensor? A. Variable resistance B. Capacitive sensing C. Thermal sensing  D. Optical sensing 12. What is another term for a Barometric Pressure Sensor? A. Pressure transducer B. Manometer C. Flow meter D. Rain sensor 13. What is the primary function of a Manometer? A. To detect water drops and rainfall B. To monitor atmospheric pressure C. To measure the pressure of a fluid D. To measure the rate of flow of liquids 14. What is the significance of a Manometer in environmental studies? A. It detects water drops and rainfall B. It monitors atmospheric pressure C. It measures the rate of flow of liquids D. It measures atmospheric pressure and other environmental gases 15. What is the principle behind the operation of RTDs? A. Change in thermal energy with temperature B. Change in electrical resistance with temperature C. Change in thermal conductivity with temperature D. Change in electrical conductivity with temperature 16. What is the primary application of RTDs in industrial settings? A. Monitoring and controlling flow rate B. Monitoring and controlling humidity C. Monitoring and controlling temperature D. Monitoring and controlling pressure 17. What is the characteristic of thermistors that makes them suitable for lower temperatures? A. High sensitivity and nonlinearity B. High sensitivity and linearity C. Low sensitivity and nonlinearity D. Low sensitivity and linearity 18. What is the primary advantage of thermocouples? A. Wide temperature range and simplicity B. Low cost C. Fast response time D. High accuracy 19. What is the characteristic of RTDs that makes them suitable for higher temperatures? A. Low sensitivity and nonlinearity B. Low sensitivity and linearity C. High sensitivity and nonlinearity D. High sensitivity and linearity 20. Which type of temperature sensor is the most commonly used? A. Thermocouple B. Thermistor C. RTD D. Thermal Transducer 21. What is the purpose of the reference junction in a thermocouple? A. To transfer heat B. To generate electricity C. To measure temperature D. To maintain a constant temperature 22. What is the principle behind the operation of TEG?  A. Piezoelectric effect B. Peltier effect C. Thermistor effect D. Seebeck effect 23. What is the output voltage of the LM35 temperature sensor? A. Proportional to temperature in Kelvin B. Constant regardless of temperature C. Proportional to temperature in Celsius D. Proportional to temperature in Fahrenheit 24. What is the purpose of a TEC? A. To cool or heat electronic devices B. To generate electricity C. To measure temperature D. To transfer heat 25. What is the characteristic of a bimetallic thermostat? A. It expands at a uniform rate when heated B. It contracts at a uniform rate when cooled C. It expands at different rates when heated D. It remains constant when heated or cooled