COMPARATORS

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• Q1: What are Comparators?
  Ans: Comparators are precision instruments used to compare the dimensions of a workpiece with a standard size instead of measuring the actual value.
• Q2: State the importance of Comparators.
  Ans: Importance of comparators are:

  • ➔ High accuracy measurement
  • ➔ Detects small variations
  • ➔ Improves quality control
  • ➔ Saves time in inspection
• Q3: State any four characteristics of Comparators.
  Ans: Characteristics of comparators are:

  • ➔ High sensitivity
  • ➔ High accuracy
  • ➔ Quick response
  • ➔ Easy readability
• Q4: State any four uses of Comparators.
  Ans: Uses of comparators are:

  • ➔ Checking dimensional accuracy
  • ➔ Comparing parts with standard
  • ➔ Mass production inspection
  • ➔ Detecting small errors
• Q5: State the types of Comparators.
  Ans: Types of comparators are:

  • ➔ Mechanical Comparator
  • ➔ Electrical Comparator
  • ➔ Electronic Comparator
  • ➔ Optical Comparator
• Q6: What is a Mechanical Comparator?
  Ans: A mechanical comparator is a device that uses mechanical means like levers and gears to magnify small displacements.
• Q7: State the working principle of a Mechanical Comparator.
  Ans: It works on the principle of mechanical magnification.
  Small movement of the probe is amplified by levers and gears.
  The result is shown on a dial scale.
• Q8: State the parts of a Mechanical Comparator.
  Ans: Parts of a mechanical comparator are:

  • ➔ Plunger (Probe)
  • ➔ Lever system
  • ➔ Gear mechanism
  • ➔ Dial indicator
  • ➔ Scale
• Q9: State the advantages of a Mechanical Comparator.
  Ans: Advantages are:

  • ➔ Simple construction
  • ➔ Easy to use
  • ➔ No external power required
  • ➔ Low cost
• Q10: State the disadvantages of a Mechanical Comparator.
  Ans: Disadvantages are:

  • ➔ Less accuracy compared to electronic types
  • ➔ Wear and tear of parts
  • ➔ Friction errors
  • ➔ Limited magnification
• Q11: What is an Electrical Comparator?
  Ans: An electrical comparator uses electrical signals to detect and measure small variations in dimensions.
• Q12: State the types of an Electrical Comparator.
  Ans: Types of electrical comparators are:

  • ➔ Electrical Dial Comparator
  • ➔ Electrical Digital Comparator
• Q13: What is an Electrical Dial Comparator?
  Ans: An electrical dial comparator is a device that converts displacement into electrical signals and displays it on a dial.
• Q14: State the uses of an Electrical Comparator.
  Ans: Uses are:

  • ➔ Precision measurement
  • ➔ Inspection work
  • ➔ Quality control
  • ➔ Detecting small variations
• Q15: State the parts of an Electrical Comparator.
  Ans: Parts are:

  • ➔ Probe
  • ➔ Transducer
  • ➔ Amplifier
  • ➔ Display unit
• Q16: State the working principle of an Electrical Dial Comparator.
  Ans: The probe senses displacement.
  It is converted into an electrical signal by a transducer.
  The signal is amplified.
  The output is shown on a dial.
• Q17: State the advantages of an Electrical Dial Comparator.
  Ans: Advantages are:

  • ➔ High accuracy
  • ➔ High sensitivity
  • ➔ Less friction
  • ➔ Quick response
• Q18: State the disadvantages of an Electrical Dial Comparator.
  Ans: Disadvantages are:

  • ➔ Requires power supply
  • ➔ Costly
  • ➔ Sensitive to environmental conditions
• Q19: What is an Electrical Digital Comparator?
  Ans: An electrical digital comparator is a device that displays measurement results in digital form using electronic circuits.
• Q20: State the working principle of an Electrical Digital Comparator.
  Ans: The probe detects displacement.
  The signal is converted into digital form.
  The processed value is shown on a digital display.
• Q21: State the advantages of an Electrical Digital Comparator.
  Ans: Advantages are:

  • ➔ Very high accuracy
  • ➔ Clear digital display
  • ➔ No reading error
  • ➔ Fast measurement
• Q22: State the disadvantages of an Electrical Digital Comparator.
  Ans: Disadvantages are:

  • ➔ Expensive
  • ➔ Needs power supply
  • ➔ Complex design
• Q23: What is an Electronics Comparator?
  Ans: An electronic comparator is a device that uses electronic circuits to compare and measure dimensions with very high accuracy.
• Q24: State the working principle of an Electronics Comparator.
  Ans: The probe senses displacement.
  The signal is converted into electrical form.
  It is amplified using electronic circuits.
  The result is displayed on screen.
• Q25: State the advantages of an Electronics Comparator.
  Ans: Advantages are:

  • ➔ Very high accuracy
  • ➔ High sensitivity
  • ➔ No mechanical wear
  • ➔ Fast response
• Q26: State the disadvantages of an Electronics Comparator.
  Ans: Disadvantages are:

  • ➔ Expensive
  • ➔ Requires skilled operation
  • ➔ Needs power supply
• Q27: What are light indicators?
  Ans: Light indicators are devices that use light signals to show variations or deviations in measurement.
• Q28: What is a Probe?
  Ans: A probe is a sensing element of a measuring instrument that comes in contact with the workpiece to detect displacement or variation.