Instrumentation MCQs

50 min Score: 0 Attempted: 0/50

1. What is the primary function of an instrument in a measurement system?
(A) To store data
(B) To control processes
(C) To process data
(D) To measure physical quantities

2. Which type of sensor converts physical quantity into an electrical signal?
(A) Actuator
(B) Transducer
(C) Controller
(D) Indicator

3. What does a “thermocouple” measure?
(A) Flow rate
(B) Pressure
(C) Temperature
(D) Humidity

4. What is the principle behind a “strain gauge”?
(A) It measures strain by detecting changes in resistance
(B) It measures pressure by detecting changes in capacitance
(C) It measures temperature by detecting changes in voltage
(D) It measures flow rate by detecting changes in frequency

5. Which device is used to measure the flow rate of a liquid?
(A) Thermometer
(B) Pressure gauge
(C) Flowmeter
(D) Hygrometer

6. What does a “manometer” measure?
(A) Temperature
(B) Speed
(C) Pressure
(D) Distance

7. What is the main use of a “calibration” process in instrumentation?
(A) To reduce measurement noise
(B) To ensure accuracy and precision of measurements
(C) To improve the sensor’s sensitivity
(D) To increase the measurement range

8. Which type of measurement does a “pH meter” perform?
(A) Temperature
(B) Humidity
(C) pH level
(D) Pressure

9. What is the function of a “pressure transducer”?
(A) To convert pressure into an electrical signal
(B) To determine flow rate
(C) To measure temperature changes
(D) To measure humidity

10. What does an “oscilloscope” display?
(A) The waveform of electrical signals
(B) The temperature of an object
(C) The pressure of a fluid
(D) The pH of a solution

11. What type of sensor is a “piezoelectric sensor”?
(A) It converts mechanical stress into electrical charge
(B) It detects light intensity by varying resistance
(C) It measures pressure by capacitive change
(D) It measures temperature by resistance change

12. What does a “displacement sensor” measure?
(A) The distance or change in position of an object
(B) The pressure of a fluid
(C) The temperature of an object
(D) The flow rate of a liquid

13. What is an “RTD” used to measure?
(A) Pressure
(B) Temperature
(C) Flow rate
(D) Humidity

14. What is the purpose of an “instrumentation amplifier”?
(A) To filter noise from signals
(B) To amplify low-level signals with high precision
(C) To convert analog signals to digital
(D) To measure temperature changes

15. Which type of sensor uses a “capacitive” principle?
(A) Resistive temperature device (RTD)
(B) Thermocouple
(C) Strain gauge
(D) Capacitive proximity sensor

16. What is a “hall effect sensor” used to measure?
(A) Magnetic fields
(B) Pressure
(C) Temperature
(D) Displacement

17. In a “data acquisition system,” what is the role of an “analog-to-digital converter (ADC)”?
(A) To amplify digital signals
(B) To convert analog signals into digital signals
(C) To measure analog signals
(D) To filter analog signals

18. What does a “humidity sensor” measure?
(A) The temperature of an object
(B) The pressure of a fluid
(C) The flow rate of a liquid
(D) The amount of moisture in the air

19. What does a “gas chromatograph” analyze?
(A) The temperature of a fluid
(B) The flow rate of a liquid
(C) The composition of gases or volatile compounds
(D) The pressure of a gas

20. What is the main function of a “vibration sensor”?
(A) To measure temperature changes
(B) To detect changes in pressure
(C) To measure flow rate
(D) To measure the frequency and amplitude of vibrations

21. What is the primary use of a “level sensor”?
(A) To determine the pressure of a fluid
(B) To measure the temperature of a substance
(C) To detect the level of liquids or solids in a container
(D) To measure the flow rate of a liquid

22. What does a “thermistor” measure?
(A) Pressure based on capacitance change
(B) Flow rate based on frequency change
(C) pH level based on voltage change
(D) Temperature based on resistance change

23. What is the function of a “load cell” in instrumentation?
(A) To measure force or weight
(B) To measure temperature changes
(C) To determine fluid flow rate
(D) To measure humidity

24. What does a “digital voltmeter” measure?
(A) Resistance in a digital format
(B) Current in a digital format
(C) Voltage in a digital format
(D) Frequency in a digital format

25. What principle does a “photoelectric sensor” operate on?
(A) It detects changes in pressure
(B) It detects changes in light intensity
(C) It measures changes in temperature
(D) It measures changes in magnetic fields

26. What is the primary function of a “speed sensor”?
(A) To measure the temperature of a fluid
(B) To measure the speed of rotating or moving objects
(C) To detect the pressure of a gas
(D) To determine the flow rate of a liquid

27. What type of sensor is a “proximity sensor”?
(A) A sensor that measures pressure variations
(B) A sensor that measures flow rate
(C) A sensor that measures temperature changes
(D) A sensor that detects the presence of nearby objects without physical contact

28. What does a “current transformer” measure?
(A) Voltage in an AC circuit
(B) Resistance in a DC circuit
(C) Power in an AC circuit
(D) Current in an AC circuit

29. What is the main use of a “frequency meter”?
(A) To measure the frequency of an electrical signal
(B) To measure the voltage of an electrical signal
(C) To measure the current in an electrical signal
(D) To measure the power in an electrical signal

30. What does a “gas sensor” measure?
(A) The temperature of a gas
(B) The flow rate of a gas
(C) The pressure of a gas
(D) The concentration of specific gases in the environment

31. What does a “differential pressure sensor” measure?
(A) The temperature of a fluid
(B) The flow rate of a fluid
(C) The absolute pressure of a fluid
(D) The difference in pressure between two points

32. What is the purpose of a “signal conditioner”?
(A) To measure the signal directly
(B) To store the signal data
(C) To display the signal
(D) To modify the signal to a suitable form for measurement or processing

33. What does a “vortex flowmeter” measure?
(A) The flow rate of a fluid using vortex shedding principle
(B) The density of a fluid
(C) The pressure of a fluid
(D) The temperature of a fluid

34. What type of measurement does an “inductive proximity sensor” provide?
(A) Detection of the presence of metal objects
(B) Measurement of temperature
(C) Measurement of pressure
(D) Measurement of flow rate

35. What does a “photoresistor” change its resistance based on?
(A) Pressure
(B) Light intensity
(C) Temperature
(D) Humidity

36. What is a “rheostat” used for?
(A) To measure pressure
(B) To measure temperature
(C) To adjust the resistance in a circuit
(D) To measure flow rate

37. What does a “humidity sensor” typically use to measure moisture content?
(A) Capacitive or resistive principles
(B) Optical or acoustic principles
(C) Magnetic or inductive principles
(D) Thermal or piezoelectric principles

38. What does a “digital multimeter” measure?
(A) Flow rate and humidity
(B) Pressure and temperature
(C) Voltage, current, and resistance
(D) Speed and displacement

39. What principle does a “thermocouple” use to measure temperature?
(A) The Seebeck effect, where a voltage is generated due to different metals at different temperatures
(B) The resistance change due to temperature
(C) The capacitance change due to temperature
(D) The piezoelectric effect due to temperature changes

40. What is a “Bourdon tube” used for in instrumentation?
(A) To measure pressure
(B) To measure temperature
(C) To measure displacement
(D) To measure flow rate

41. What does a “tachometer” measure?
(A) The temperature of an object
(B) The flow rate of a liquid
(C) The pressure of a fluid
(D) The rotational speed of a shaft or wheel

42. What is the function of a “thermal imaging camera”?
(A) To measure pressure variations
(B) To determine fluid flow rate
(C) To capture the heat emitted by objects and visualize temperature distribution
(D) To measure light intensity

43. What is a “load cell” primarily used for in industrial applications?
(A) To measure temperature changes
(B) To measure the weight or force applied to it
(C) To measure humidity levels
(D) To determine fluid flow rate

44. What is an “ultrasonic sensor” used to measure?
(A) Temperature by measuring sound velocity
(B) Pressure by detecting sound frequency changes
(C) Distance by emitting sound waves and measuring the reflection time
(D) Flow rate by detecting sound attenuation

45. What does a “pneumatic pressure transducer” convert?
(A) Pneumatic pressure into an electrical signal
(B) Electrical signals into pneumatic pressure
(C) Fluid flow into electrical signals
(D) Temperature into pneumatic pressure

46. What does a “capacitive level sensor” measure?
(A) The pressure of a gas
(B) The temperature of a fluid
(C) The level of liquids or solids based on changes in capacitance
(D) The flow rate of a liquid

47. What does a “radar level sensor” use to measure level?
(A) Temperature changes to determine the level
(B) Radio waves to detect the distance to the surface of the material
(C) Pressure changes to measure the level
(D) Acoustic waves to measure the distance

48. What is the main advantage of using an “optical sensor”?
(A) It is highly sensitive to temperature changes
(B) It provides high-speed measurement for flow rates
(C) It provides non-contact measurement with high precision
(D) It can measure pressure changes effectively

49. What does a “magnetostrictive sensor” measure?
(A) Temperature by measuring resistance changes
(B) Pressure by detecting capacitance changes
(C) Distance by detecting changes in magnetic properties
(D) Flow rate by measuring frequency changes

50. What does a “spectrometer” measure in terms of light?
(A) The intensity and wavelength distribution of light
(B) The distance and displacement of light
(C) The speed and flow rate of light
(D) The temperature and pressure of light

Leave a Comment Cancel reply