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Which of the following best describes an analog measuring instrument?

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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

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Q1. Which of the following best describes an analog measuring instrument?

  1. An instrument that provides a digital readout of measurements.
  2. An instrument that indicates measurement values using a continuous scale or pointer.
  3. An instrument that stores measurement data electronically for later analysis.
  4. An instrument that uses binary code to represent measurement values.

Q2. In terms of accuracy and ease of reading, how do digital instruments generally compare to analog instruments?

  1. Digital instruments are less accurate but easier to read than analog instruments
  2. Digital instruments are more accurate and easier to read than analog instruments
  3. Digital instruments are equally accurate but harder to read than analog instruments
  4. Digital instruments are less accurate and harder to read than analog instruments

Q3. Calculate the reading on a passive mechanical dial gauge if the pointer deflects by 15 divisions, each division representing 0.02 mm. What is the measured displacement?

  1. 0.3 mm
  2. 0.15 mm
  3. 3 mm
  4. 0.02 mm

Q4. Consider a weighing instrument that measures mass by balancing an unknown weight against a known standard. Under which classification does this instrument fall?

  1. Direct reading instrument
  2. Comparative instrument
  3. Digital instrument
  4. Non-mechanical instrument

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. 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.

Q7. 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

Q8. 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

Q9. 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.

Q10. A flow measuring instrument is classified as volumetric and uses the displacement principle. If the instrument measures 15 liters in 3 minutes, what is the flow rate in liters per minute?

  1. 5 liters per minute
  2. 45 liters per minute
  3. 0.2 liters per minute
  4. 18 liters per minute

Q11. 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

Q12. 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

Q13. 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

Q14. 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

Q15. 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
Free Inspector Of Legal Metrology Practice Questions | Kerala PSC Prep