Sensor Technologies MCQs

1. Which sensor technology is commonly used for measuring temperature in industrial applications? A. Thermocouple B. Hall Effect sensor C. Strain gauge D. Accelerometer Correct Answer: A. Thermocouple 2. What type of sensor is commonly used for detecting proximity and object presence in automated systems? A. Ultrasonic sensor B. Gyroscope C. Pressure sensor D. Photodetector Correct Answer: A. Ultrasonic sensor 3. Which sensor technology is used for detecting and measuring humidity in environmental monitoring? A. Capacitive humidity sensor B. Hall Effect sensor C. Piezoelectric sensor D. Infrared sensor Correct Answer: A. Capacitive humidity sensor 4. Which sensor technology is commonly used for detecting gas concentrations in industrial safety applications? A. Piezoelectric sensor B. Strain gauge C. Gas sensor (electrochemical) D. Optical sensor Correct Answer: C. Gas sensor (electrochemical) 5. What type of sensor technology is utilized for detecting and measuring pressure in automotive tire pressure monitoring systems (TPMS)? A. Thermocouple B. Hall Effect sensor C. Capacitive sensor D. Piezoresistive sensor Correct Answer: D. Piezoresistive sensor 6. Which sensor technology is commonly used in smartphones for orientation sensing and navigation? A. LiDAR sensor B. MEMS accelerometer C. Fiber optic sensor D. Quantum sensor Correct Answer: B. MEMS accelerometer 7. What type of sensor is typically used for detecting motion in security systems and automatic lighting? A. Ultrasonic sensor B. Hall Effect sensor C. LiDAR sensor D. Fiber optic sensor Correct Answer: A. Ultrasonic sensor 8. Which sensor technology is used for measuring strain and deformation in structural health monitoring of bridges and buildings? A. Strain gauge B. Hall Effect sensor C. Ultrasonic sensor D. Infrared sensor Correct Answer: A. Strain gauge 9. What type of sensor technology is commonly used for detecting electromagnetic fields in proximity sensing applications? A. Hall Effect sensor B. Thermocouple C. Capacitive sensor D. Photodetector Correct Answer: A. Hall Effect sensor 10. Which sensor technology is used for measuring blood oxygen levels in medical devices such as pulse oximeters? A. Capacitive humidity sensor B. Pulse sensor C. Infrared sensor D. Optical sensor Correct Answer: D. Optical sensor 11. Which sensor technology is commonly used for detecting light intensity and ambient light levels in smartphones and digital cameras? A. Photodetector B. Hall Effect sensor C. Ultrasonic sensor D. MEMS accelerometer Correct Answer: A. Photodetector 12. What type of sensor technology is utilized for detecting and measuring sound waves in ultrasonic distance measurement systems? A. Thermocouple B. Ultrasonic sensor C. Capacitive sensor D. Piezoelectric sensor Correct Answer: B. Ultrasonic sensor 13. Which sensor technology is commonly used for detecting and measuring angular rotation in automotive stability control systems? A. Gyroscope B. Hall Effect sensor C. Strain gauge D. Infrared sensor Correct Answer: A. Gyroscope 14. What type of sensor is typically used for measuring acceleration in inertial navigation systems (INS)? A. MEMS accelerometer B. Fiber optic sensor C. LiDAR sensor D. Quantum sensor Correct Answer: A. MEMS accelerometer 15. Which sensor technology is used for measuring the level of liquid in tanks and containers? A. Hall Effect sensor B. Capacitive sensor C. Gas sensor (electrochemical) D. Optical sensor Correct Answer: B. Capacitive sensor 16. What type of sensor technology is commonly used for detecting the presence and concentration of chemical substances in environmental monitoring? A. Piezoelectric sensor B. Gas sensor (electrochemical) C. Strain gauge D. Photodetector Correct Answer: B. Gas sensor (electrochemical) 17. Which sensor technology is used for detecting temperature changes and controlling heating, ventilation, and air conditioning (HVAC) systems? A. Hall Effect sensor B. Infrared sensor C. Fiber optic sensor D. Capacitive sensor Correct Answer: B. Infrared sensor 18. What type of sensor technology is commonly used for detecting the presence and level of liquids in industrial applications? A. Ultrasonic sensor B. Hall Effect sensor C. Capacitive sensor D. MEMS accelerometer Correct Answer: C. Capacitive sensor 19. Which sensor technology is used for measuring the Earth’s magnetic field and providing heading information in navigation systems? A. Hall Effect sensor B. MEMS accelerometer C. Gyroscope D. Magnetometer Correct Answer: D. Magnetometer 20. What type of sensor technology is utilized for detecting and measuring vibrations in rotating machinery for predictive maintenance? A. Strain gauge B. Piezoelectric sensor C. Photodetector D. Capacitive sensor Correct Answer: B. Piezoelectric sensor 21. Which sensor technology is commonly used for detecting the level of solids and powders in industrial hoppers and silos? A. Ultrasonic sensor B. Capacitive sensor C. Infrared sensor D. Fiber optic sensor Correct Answer: B. Capacitive sensor 22. What type of sensor technology is used for detecting the presence and concentration of toxic gases in industrial environments? A. Gas sensor (electrochemical) B. Hall Effect sensor C. MEMS accelerometer D. Optical sensor Correct Answer: A. Gas sensor (electrochemical) 23. Which sensor technology is commonly used for measuring pH levels in water quality monitoring systems? A. Hall Effect sensor B. Capacitive sensor C. pH sensor (electrochemical) D. Ultrasonic sensor Correct Answer: C. pH sensor (electrochemical) 24. What type of sensor is typically used for detecting and measuring radiation levels in nuclear power plants? A. Radiation dosimeter B. Geiger-Muller counter C. Hall Effect sensor D. MEMS accelerometer Correct Answer: B. Geiger-Muller counter 25. Which sensor technology is commonly used for detecting the level of liquid in narrow containers or pipelines? A. Ultrasonic sensor B. Capacitive sensor C. Optical sensor D. Hall Effect sensor Correct Answer: A. Ultrasonic sensor 26. What type of sensor technology is used for detecting and measuring the concentration of glucose in blood glucose monitoring devices? A. Hall Effect sensor B. Gas sensor (electrochemical) C. Glucose sensor (enzymatic) D. MEMS accelerometer Correct Answer: C. Glucose sensor (enzymatic) 27. Which sensor technology is commonly used for detecting and measuring seismic activity in earthquake monitoring systems? A. Seismometer B. Capacitive sensor C. Infrared sensor D. Fiber optic sensor Correct Answer: A. Seismometer 28. What type of sensor technology is used for detecting and measuring the level of oxygen in medical oxygen concentrators? A. Hall Effect sensor B. Oxygen sensor (electrochemical) C. MEMS accelerometer D. Ultrasonic sensor Correct Answer: B. Oxygen sensor (electrochemical) 29. Which sensor technology is commonly used for detecting and measuring the flow rate of liquids in industrial pipelines? A. Flow sensor (turbine) B. Capacitive sensor C. Hall Effect sensor D. MEMS accelerometer Correct Answer: A. Flow sensor (turbine) 30. What type of sensor technology is used for detecting and measuring the presence of metal objects in security scanners and metal detectors? A. Hall Effect sensor B. Capacitive sensor C. Inductive sensor D. Optical sensor Correct Answer: C. Inductive sensor 31. Which sensor technology is commonly used for detecting and measuring the level of liquid in fuel tanks of vehicles? A. Capacitive sensor B. Ultrasonic sensor C. Hall Effect sensor D. Optical sensor Correct Answer: A. Capacitive sensor 32. What type of sensor technology is used for detecting and measuring the concentration of carbon dioxide in indoor air quality monitoring systems? A. CO2 sensor (non-dispersive infrared) B. Hall Effect sensor C. MEMS accelerometer D. Ultrasonic sensor Correct Answer: A. CO2 sensor (non-dispersive infrared) 33. Which sensor technology is commonly used for detecting and measuring the level of water in residential sump pumps? A. Capacitive sensor B. Ultrasonic sensor C. Hall Effect sensor D. Optical sensor Correct Answer: A. Capacitive sensor 34. What type of sensor is typically used for detecting and measuring blood pressure in medical devices? A. Sphygmomanometer B. Piezoelectric sensor C. Hall Effect sensor D. MEMS accelerometer Correct Answer: A. Sphygmomanometer 35. Which sensor technology is used for detecting and measuring magnetic fields in electronic compasses and navigation systems? A. Magnetometer B. Hall Effect sensor C. MEMS accelerometer D. Gyroscope Correct Answer: A. Magnetometer 36. What type of sensor technology is commonly used for detecting and measuring the level of dust and particulate matter in the air? A. Optical sensor B. Gas sensor (electrochemical) C. Capacitive sensor D. Ultrasonic sensor Correct Answer: A. Optical sensor 37. Which sensor technology is used for detecting and measuring the amount of light absorbed by a sample in a spectrophotometer? A. Photodetector B. Hall Effect sensor C. MEMS accelerometer D. Piezoelectric sensor Correct Answer: A. Photodetector 38. What type of sensor technology is used for detecting and measuring the concentration of ozone in the atmosphere? A. Ozone sensor (electrochemical) B. Hall Effect sensor C. Gas sensor (infrared) D. Capacitive sensor Correct Answer: A. Ozone sensor (electrochemical) 39. Which sensor technology is commonly used for detecting and measuring the pressure of gases in industrial applications? A. Pressure transducer B. Hall Effect sensor C. Capacitive sensor D. MEMS accelerometer Correct Answer: A. Pressure transducer 40. What type of sensor technology is used for detecting and measuring temperature changes in cryogenic applications? A. Resistance temperature detector (RTD) B. Thermocouple C. Capacitive sensor D. Ultrasonic sensor Correct Answer: B. Thermocouple 41. Which sensor technology is commonly used for detecting and measuring the level of liquid in a tank using radar waves? A. Radar level sensor B. Capacitive sensor C. Optical sensor D. Ultrasonic sensor Correct Answer: A. Radar level sensor 42. What type of sensor technology is used for detecting and measuring the concentration of particulate matter in industrial exhaust gases? A. Optical sensor B. Gas sensor (electrochemical) C. Capacitive sensor D. Hall Effect sensor Correct Answer: A. Optical sensor 43. Which sensor technology is used for detecting and measuring the presence of toxic gases in confined spaces? A. Gas sensor (electrochemical) B. MEMS accelerometer C. Hall Effect sensor D. Infrared sensor Correct Answer: A. Gas sensor (electrochemical) 44. What type of sensor technology is utilized for measuring the concentration of volatile organic compounds (VOCs) in the air? A. VOC sensor (metal oxide) B. Hall Effect sensor C. Piezoelectric sensor D. Capacitive sensor Correct Answer: A. VOC sensor (metal oxide) 45. Which sensor technology is used for detecting and measuring the distance between objects using laser beams? A. LiDAR sensor B. Ultrasonic sensor C. Capacitive sensor D. Hall Effect sensor Correct Answer: A. LiDAR sensor 46. What type of sensor technology is commonly used for measuring the level of water in agricultural irrigation systems? A. Capacitive sensor B. Ultrasonic sensor C. Optical sensor D. Hall Effect sensor Correct Answer: B. Ultrasonic sensor 47. Which sensor technology is used for detecting and measuring the presence and concentration of nitrogen dioxide in air quality monitoring? A. NO2 sensor (electrochemical) B. Hall Effect sensor C. Capacitive sensor D. Piezoelectric sensor Correct Answer: A. NO2 sensor (electrochemical) 48. What type of sensor is typically used for detecting the presence of flammable gases in industrial environments? A. Gas sensor (infrared) B. Hall Effect sensor C. MEMS accelerometer D. Optical sensor Correct Answer: A. Gas sensor (infrared) 49. Which sensor technology is commonly used for detecting and measuring the level of liquids in pharmaceutical and food processing industries? A. Capacitive sensor B. Ultrasonic sensor C. Optical sensor D. Hall Effect sensor Correct Answer: C. Optical sensor 50. What type of sensor technology is used for measuring the concentration of carbon monoxide in indoor air quality monitoring systems? A. CO sensor (electrochemical) B. Hall Effect sensor C. Capacitive sensor D. Infrared sensor Correct Answer: A. CO sensor (electrochemical)**

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