Instrumentation and Measurement – MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 2, 2025

1. : What is the primary function of an instrument in measurement systems?
(A) Control a process
(B) Display advertisements
(C) Monitor and measure variables
(D) Transmit power

2. : Which of the following is a primary element in a measurement system?
(A) Display
(B) Sensor
(C) Processor
(D) Actuator

3. : The unit of resistance is:
(A) Farad
(B) Henry
(C) Ohm
(D) Watt

4. : What type of error is caused by environmental conditions?
(A) Systematic error
(B) Gross error
(C) Random error
(D) Parallax error

5. : Which instrument is used to measure voltage?
(A) Ammeter
(B) Voltmeter
(C) Wattmeter
(D) Multimeter

6. : A thermocouple is used to measure:
(A) Pressure
(B) Voltage
(C) Temperature
(D) Current

7. : LVDT is used to measure:
(A) Displacement
(B) Current
(C) Pressure
(D) Temperature

8. : The basic principle of strain gauges is:
(A) Change in capacitance
(B) Change in resistance
(C) Change in inductance
(D) Change in voltage

9. : Which device is used for pressure measurement?
(A) Hygrometer
(B) Strain gauge
(C) Thermistor
(D) Manometer

10. : The accuracy of an instrument refers to:
(A) Closeness to the true value
(B) Reproducibility of results
(C) Speed of measurement
(D) Sensitivity to input

11. : Which of the following is a dynamic characteristic of an instrument?
(A) Linearity
(B) Accuracy
(C) Response time
(D) Resolution

12. : The resolution of an instrument is:
(A) Smallest change it can detect
(B) Largest error
(C) Overall size
(D) Average value

13. : A galvanometer is primarily used for:
(A) Voltage measurement
(B) Measuring small currents
(C) High power measurement
(D) Temperature sensing

14. : Which of these is a non-electrical transducer?
(A) RTD
(B) Thermistor
(C) Thermocouple
(D) Bourdon tube

15. : The SI unit of temperature is:
(A) Celsius
(B) Kelvin
(C) Fahrenheit
(D) Rankine

16. : Which type of instrument is used for measuring electric energy?
(A) Wattmeter
(B) Voltmeter
(C) Energy meter
(D) Multimeter

17. : Dead zone of an instrument refers to:
(A) Maximum measurable range
(B) Region where no output is obtained for a change in input
(C) Power loss
(D) Over-voltage range

18. : Which instrument can measure both AC and DC current?
(A) Moving iron instrument
(B) Moving coil instrument
(C) Thermocouple
(D) Ammeter

19. : Which sensor is used to detect humidity?
(A) Hygrometer
(B) Thermocouple
(C) LVDT
(D) RTD

20. : Which of these is NOT a part of a general measurement system?
(A) Primary sensing element
(B) Signal conditioning
(C) Display unit
(D) Actuator

21. : Calibration of an instrument means:
(A) Making it digital
(B) Comparing with a standard
(C) Designing a new circuit
(D) Replacing faulty parts

22. : What does RTD stand for?
(A) Real-Time Detector
(B) Resistance Temperature Detector
(C) Resistance Time Device
(D) Radio Transmission Detector

23. : Piezoelectric transducers are primarily used for measuring:
(A) Pressure
(B) Acceleration and vibrations
(C) Voltage
(D) Temperature

24. : The unit of capacitance is:
(A) Ampere
(B) Ohm
(C) Farad
(D) Volt

25. : An analog signal is:
(A) Continuous in time and amplitude
(B) Discrete in time
(C) Only binary
(D) Used only in digital systems