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Scenario: An inspector is evaluating two measuring instruments for a legal metrology application: Instrument X is analog with a mechanical pointer, and Instrument Y is digital with an LCD display. Which of the following statements is most accurate regarding their classification and characteristics?

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Free Inspector Of Legal Metrology Practice Questions

Category No: 613/2025 The Inspector of Legal Metrology exam is conducted by the Kerala Public Service Commission for recruitment to the Kerala Government Service. This exam tests candidates' knowledge in science and engineering disciplines relevant to legal metrology, along with proficiency in Malayalam. Successful candidates will be appointed as Inspectors, responsible for enforcing legal metrology laws and regulations. Direct Recruitment Graduation/Diploma Required Pay Scale ₹43,400 – 91,200 Age Limit 18-36 Years Kerala PSC Online Application Malayalam Language Apply by 04.02.2026

Try 15 free syllabus-aligned practice questions for the Inspector Of Legal Metrology exam. Each question includes instant feedback so you can learn as you go. No sign-up required.

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Q1. Scenario: An inspector is evaluating two measuring instruments for a legal metrology application: Instrument X is analog with a mechanical pointer, and Instrument Y is digital with an LCD display. Which of the following statements is most accurate regarding their classification and characteristics?

  1. Instrument X is classified as analog because it uses a continuous scale, while Instrument Y is digital because it displays discrete numerical values.
  2. Instrument X is digital because it uses a pointer, and Instrument Y is analog because it uses an LCD display.
  3. Both instruments are analog since they measure the same physical quantity.
  4. Both instruments are digital because modern instruments always use electronic displays.

Q2. An inspector is using an analog pressure gauge to measure the pressure in a gas cylinder. The gauge has a scale from 0 to 100 psi with 1 psi divisions. If the pointer is halfway between 45 psi and 46 psi, what is the approximate pressure reading?

  1. 44.5 psi
  2. 45.5 psi
  3. 46.5 psi
  4. 45.0 psi

Q3. An active instrument used for measuring electrical current requires a 12V DC power supply to function. If the power supply fails, what is the expected behavior of the instrument?

  1. It will continue measuring accurately using stored energy.
  2. It will stop functioning and not provide measurements.
  3. It will switch to mechanical measurement mode automatically.
  4. It will provide approximate measurements without power.

Q4. Consider two measuring instruments: Instrument X requires electrical power to operate, while Instrument Y operates solely on mechanical movement. Which classification applies to Instrument X and Instrument Y respectively?

  1. Instrument X - Passive; Instrument Y - Active
  2. Instrument X - Active; Instrument Y - Passive
  3. Both Instrument X and Y are Active
  4. Both Instrument X and Y are Passive

Q5. Consider two measuring instruments: one passive and one active. Which characteristic is unique to passive instruments?

  1. They require batteries or external power to function.
  2. They measure quantities without altering them or needing power.
  3. They provide digital readouts through electronic circuits.
  4. They can automatically calibrate themselves during measurement.

Q6. Consider two digital instruments measuring the same parameter: Instrument X uses a resistive sensor, while Instrument Y uses a capacitive sensor. Which factor is most likely to differ significantly between these two instruments?

  1. The type of digital display used
  2. The principle of sensing the physical quantity
  3. The unit of measurement displayed
  4. The legal metrology certification process

Q7. An inspector is examining a mechanical spring balance used for weighing. Which classification does this instrument fall under?

  1. Active measuring instrument
  2. Passive measuring instrument
  3. Electronic measuring instrument
  4. Digital measuring instrument

Q8. An inspector encounters two measuring instruments: one uses a mechanical spring principle, and the other uses an electronic sensor. According to classification, these instruments belong to which categories respectively?

  1. Mechanical and Electrical
  2. Electronic and Mechanical
  3. Electrical and Hydraulic
  4. Hydraulic and Pneumatic

Q9. In which scenario would a passive measuring instrument be preferred over an active one?A) When measuring electrical signals requiring amplification.B) When power supply is unreliable or unavailable.C) When digital data output is mandatory.D) When automatic data logging is needed.

  1. Scenario A
  2. Scenario B
  3. Scenario C
  4. Scenario D

Q10. Which of the following best describes the primary basis for classifying measuring instruments in legal metrology?

  1. The physical size of the instrument
  2. The principle of measurement employed
  3. The country of manufacture
  4. The color and design of the instrument

Q11. An inspector is verifying a digital weighing scale used in a market. Which characteristic is most critical to check to ensure legal compliance?

  1. The color of the digital display
  2. The scale's ability to display measurements in digital format with correct units
  3. The weight of the scale itself
  4. The presence of a mechanical dial alongside the digital display

Q12. Which of the following best describes a digital measuring instrument?

  1. An instrument that uses analog dials to display measurements
  2. An instrument that converts physical quantities into digital signals for display
  3. An instrument that measures only electrical quantities
  4. An instrument that requires manual calculation of measurements

Q13. Conceptually, what is the primary difference between analog and digital measuring instruments in terms of data representation?

  1. Analog instruments represent data in discrete numerical values, digital instruments use continuous signals.
  2. Analog instruments use continuous signals to represent data, digital instruments use discrete numerical values.
  3. Both analog and digital instruments represent data using continuous signals.
  4. Both analog and digital instruments represent data using discrete numerical values.

Q14. Which of the following best defines an active measuring instrument in the context of legal metrology?

  1. An instrument that requires an external power source to operate.
  2. An instrument that measures quantities without any energy input.
  3. An instrument that only records measurements passively.
  4. An instrument that uses mechanical parts exclusively for measurement.

Q15. Which of the following best defines a passive measuring instrument?

  1. An instrument that requires an external power source to operate.
  2. An instrument that does not require any external power source for its operation.
  3. An instrument that converts electrical signals into mechanical readings.
  4. An instrument that actively modifies the quantity being measured.
Free Inspector Of Legal Metrology Practice Questions | Kerala PSC Prep