Instrumentation and Control MCQs

1. Which instrument is used to measure temperature in industrial applications?
A) Thermocouple
B) Tachometer
C) Manometer
D) Barometer
Answer: A

2. What does the acronym PLC stand for in the context of industrial control systems?
A) Programmable Logic Controller
B) Process Level Controller
C) Programmable Level Counter
D) Process Logic Controller
Answer: A

3. Which type of sensor converts physical quantities into electrical signals?
A) Transducer
B) Actuator
C) Encoder
D) Relay
Answer: A

4. What is the function of a pressure transducer?
A) Converts pressure into mechanical motion
B) Converts pressure into electrical signals
C) Measures flow rate
D) Measures temperature
Answer: B

5. Which instrument measures the rotational speed of a shaft?
A) Tachometer
B) Thermocouple
C) Pyrometer
D) Barometer
Answer: A

6. What does PID stand for in the context of control systems?
A) Proportional-Integral-Derivative
B) Pressure-Indicator-Delay
C) Process-Input-Device
D) Pulse-Increment-Damping
Answer: A

7. Which instrument is used to measure the level of liquids in tanks?
A) Flow meter
B) Thermocouple
C) Level sensor
D) Strain gauge
Answer: C

8. What is the purpose of a flow meter?
A) Measures electrical current
B) Measures temperature
C) Measures fluid flow rate
D) Measures pressure
Answer: C

9. Which type of control system adjusts the output based on both the current error and the accumulated past errors?
A) Proportional control
B) Integral control
C) Derivative control
D) PID control
Answer: D

10. What does SCADA stand for in the context of industrial automation?
A) Supervisory Control and Data Acquisition
B) Sensor Control and Data Analysis
C) System Control and Digital Automation
D) Signal Calculation and Data Acquisition
Answer: A

11. Which instrument measures the pH level of a solution?
A) pH meter
B) Barometer
C) Hygrometer
D) Anemometer
Answer: A

12. What is the function of a strain gauge?
A) Measures fluid pressure
B) Measures flow rate
C) Measures displacement or strain
D) Measures temperature
Answer: C

13. Which type of control system adjusts the output based on the current error signal only?
A) Proportional control
B) Integral control
C) Derivative control
D) PID control
Answer: A

14. What does RTD stand for in the context of temperature measurement?
A) Real-Time Data
B) Resistance Temperature Detector
C) Relative Time Delay
D) Remote Transmission Device
Answer: B

15. Which instrument measures the humidity in the air?
A) Thermocouple
B) Hygrometer
C) Tachometer
D) Manometer
Answer: B

16. What is the purpose of an actuator in a control system?
A) Measures physical quantities
B) Converts electrical signals into mechanical motion
C) Converts mechanical motion into electrical signals
D) Stores electrical energy
Answer: B

17. Which instrument measures the pressure of gases or liquids?
A) Thermocouple
B) Tachometer
C) Manometer
D) Hygrometer
Answer: C

18. What does DCS stand for in the context of industrial control systems?
A) Distributed Control System
B) Digital Control System
C) Direct Current System
D) Dynamic Control System
Answer: A

19. Which type of control system is primarily used for maintaining a constant temperature in an industrial furnace?
A) Proportional control
B) Integral control
C) Derivative control
D) PID control
Answer: D

20. What is the function of an encoder in a control system?
A) Measures fluid flow rate
B) Converts pressure into electrical signals
C) Converts mechanical motion into electrical signals
D) Measures rotational position or velocity
Answer: D

21. Which instrument measures the speed of air movement?
A) Anemometer
B) Tachometer
C) Pyrometer
D) Hygrometer
Answer: A

22. What is the primary function of a control valve in an industrial process?
A) Measures flow rate
B) Regulates fluid flow
C) Measures temperature
D) Controls pressure
Answer: B

23. Which type of control system reduces the system’s sensitivity to disturbances and noise?
A) Proportional control
B) Integral control
C) Derivative control
D) PID control
Answer: C

24. What does HMI stand for in the context of industrial automation?
A) Human-Machine Interface
B) High-Memory Integration
C) Hydraulic Machine Interface
D) Hardware-Maintenance Integration
Answer: A

25. Which instrument measures the speed of rotation of a motor or turbine?
A) Tachometer
B) Thermocouple
C) Anemometer
D) Barometer
Answer: A

26. What is the function of a solenoid valve in a control system?
A) Measures fluid pressure
B) Controls fluid flow with an electrically operated valve
C) Measures temperature
D) Regulates electrical current
Answer: B

27. Which instrument measures the intensity of light in a specific area?
A) Photometer
B) Hygrometer
C) Tachometer
D) Manometer
Answer: A

28. What does SCADA stand for in the context of industrial automation?
A) Supervisory Control and Data Acquisition
B) Sensor Control and Data Analysis
C) System Control and Digital Automation
D) Signal Calculation and Data Acquisition
Answer: A

29. Which instrument measures the concentration of a specific gas in an environment?
A) Gas chromatograph
B) Thermocouple
C) Tachometer
D) Barometer
Answer: A

30. What is the primary function of a pneumatic actuator?
A) Converts electrical signals into mechanical motion
B) Converts pressure into electrical signals
C) Converts mechanical motion into pneumatic pressure
D) Measures flow rate
Answer: C

31. Which instrument is used to measure the electrical current flowing through a circuit?
A) Ammeter
B) Voltmeter
C) Ohmmeter
D) Wattmeter
Answer: A

32. What does RTD stand for in the context of temperature measurement?
A) Real-Time Data
B) Resistance Temperature Detector
C) Relative Time Delay
D) Remote Transmission Device
Answer: B

33. Which type of sensor is commonly used to detect the presence of objects in industrial automation?
A) Proximity sensor
B) Temperature sensor
C) Pressure sensor
D) Flow sensor
Answer: A

34. What is the primary function of a load cell in industrial applications?
A) Measures fluid pressure
B) Measures flow rate
C) Measures weight or force
D) Measures temperature
Answer: C

35. Which instrument measures the angle of rotation of a shaft?
A) Tachometer
B) Thermocouple
C) Encoder
D) Barometer
Answer: C

36. What does PLC stand for in the context of industrial control systems?
A) Programmable Logic Controller
B) Process Level Controller
C) Programmable Level Counter
D) Process Logic Controller
Answer: A

37. Which instrument is used to measure the flow rate of liquids or gases?
A) Flow meter
B) Thermocouple
C) Hygrometer
D) Anemometer
Answer: A

38. What is the function of a pyrometer?
A) Measures pressure
B) Measures flow rate
C) Measures humidity
D) Measures high temperatures
Answer: D

39. Which type of control system uses a proportional gain to adjust the output based on the current error signal?
A) Proportional control
B) Integral control
C) Derivative control
D) PID control
Answer: A

40. What is the primary function of an oscilloscope in electronic testing and measurement?
A) Measures voltage
B) Measures current
C) Displays waveforms
D) Measures frequency
Answer: C

41. Which instrument measures the electrical potential difference between two points in a circuit?
A) Ammeter
B) Voltmeter
C) Ohmmeter
D) Wattmeter
Answer: B

42. What does HART stand for in the context of industrial instrumentation?
A) Highway Addressable Remote Transducer
B) High-Accuracy Remote Testing
C) Hybrid Analog and Remote Transmitter
D) High-Resolution Analog Remote Transducer
Answer: A

43. Which instrument measures the speed of rotation in RPM (revolutions per minute)?
A) Tachometer
B) Thermocouple
C) Anemometer
D) Manometer
Answer: A

44. What is the primary function of a turbidity meter in water quality monitoring?
A) Measures pH
B) Measures dissolved oxygen
C) Measures turbidity (cloudiness)
D) Measures conductivity
Answer: C

45. Which type of sensor is commonly used to detect the level of liquids in tanks?
A) Level sensor
B) Temperature sensor
C) Pressure sensor
D) Flow sensor
Answer: A

46. What does DCS stand for in the context of industrial control systems?
A) Distributed Control System
B) Digital Control System
C) Direct Current System
D) Dynamic Control System
Answer: A

47. Which instrument measures the concentration of specific ions in a solution?
A) Ion meter
B) pH meter
C) Hygrometer
D) Tachometer
Answer: A

48. What is the function of a potentiometer in electronic circuits?
A) Measures voltage
B) Measures current
C) Adjusts resistance
D) Measures temperature
Answer: C

49. Which instrument measures the force exerted on an object?
A) Load cell
B) Thermocouple
C) Encoder
D) Barometer
Answer: A

50. What is the primary function of a differential pressure transmitter in industrial applications?
A) Measures flow rate
B) Measures fluid pressure
C) Measures temperature
D) Measures humidity
Answer: B

Instrumentation and Control MCQs

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