GAUGES

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• Q1: Define Gauges.
  Ans: Gauges are inspection tools used to check whether a manufactured part is within specified limits of size without giving exact measurement.
• Q2: State the purpose of Gauges.
  Ans: The purpose of gauges is:

  • ➔ To check dimensional accuracy of parts
  • ➔ To ensure interchangeability
  • ➔ To speed up inspection process
  • ➔ To maintain quality control in production
• Q3: What is Gauge Material?
  Ans: Gauge material is the material used for manufacturing gauges that must have high hardness, wear resistance, and dimensional stability.
• Q4: State four properties of Gauge material.
  Ans: Properties are:

  • ➔ High hardness
  • ➔ High wear resistance
  • ➔ Dimensional stability
  • ➔ Corrosion resistance
• Q5: What is Gauging Force?
  Ans: Gauging force is the small amount of force applied while checking a part with a gauge to ensure proper contact without causing damage.
• Q6: State some measures taken for the care of gauges.
  Ans: Care measures are:

  • ➔ Keep gauges clean and dry
  • ➔ Apply anti-rust oil
  • ➔ Handle carefully to avoid damage
  • ➔ Store in proper boxes
• Q7: Name some materials of Gauges.
  Ans: Materials used for gauges are:

  • ➔ Hardened steel
  • ➔ Tool steel
  • ➔ Carbide
  • ➔ Stainless steel
• Q8: Define Plain Gauges.
  Ans: Plain gauges are simple gauges used to check plain dimensions such as diameter, length, or thickness of a workpiece.
• Q9: What are Standard Gauges?
  Ans: Standard gauges are gauges that are manufactured with high accuracy and used as reference standards for comparison.
• Q10: State the purpose of Standard Gauges.
  Ans: Purpose is:

  • ➔ Used as reference for calibration
  • ➔ Checking accuracy of other gauges
  • ➔ Maintaining standards in measurement
• Q11: State 4 advantages of Standard gauges.
  Ans: Advantages are:

  • ➔ High accuracy
  • ➔ Long life
  • ➔ Reliable measurements
  • ➔ Useful for calibration
• Q12: State 2 disadvantages of Standard gauges.
  Ans: Disadvantages are:

  • ➔ Expensive
  • ➔ Requires careful handling
• Q13: State the limitations of Standard gauges.
  Ans: Limitations are:

  • ➔ Not suitable for rough workshop use
  • ➔ Limited to reference purposes only
• Q14: What are Limit or Go and Not Go Gauges?
  Ans: Limit or Go and Not Go gauges are inspection gauges used to check whether a part is within permissible limits of size.
• Q15: State the purpose of Limit or Go and Not Go Gauges.
  Ans: Purpose is:

  • ➔ Quick inspection of parts
  • ➔ Ensuring parts are within tolerance limits
  • ➔ Mass production checking
• Q16: State 4 advantages of Limit or Go and Not Go gauges.
  Ans: Advantages are:

  • ➔ Fast inspection
  • ➔ No skilled operator required
  • ➔ Simple to use
  • ➔ Suitable for mass production
• Q17: State 2 disadvantages of Limit or Go and Not Go gauges.
  Ans: Disadvantages are:

  • ➔ Does not give actual measurement
  • ➔ Wear and tear affects accuracy
• Q18: State the limitations of Limit or Go and Not Go gauges.
  Ans: Limitations are:

  • ➔ Only tells pass or fail condition
  • ➔ Not suitable for precise measurement
• Q19: What are Workshop or Working Gauges?
  Ans: Workshop or working gauges are gauges used directly in production shops for quick checking of dimensions of manufactured parts.
• Q20: State the purpose of Workshop or Working Gauges.
  Ans: Purpose is:

  • ➔ To check dimensions during production
  • ➔ To ensure parts are within limits
  • ➔ To speed up inspection in workshops
• Q21: State 4 advantages of Workshop or Working gauges.
  Ans: Advantages are:

  • ➔ Fast inspection
  • ➔ Easy to use
  • ➔ Low cost
  • ➔ Suitable for mass production
• Q22: State 2 disadvantages of Workshop or Working gauges.
  Ans: Disadvantages are:

  • ➔ Less accuracy than master gauges
  • ➔ Wear and tear affects performance
• Q23: State the limitations of Workshop or Working gauges.
  Ans: Limitations are:

  • ➔ Not suitable for high precision work
  • ➔ Only used for quick checking
• Q24: What are Inspection Gauges?
  Ans: Inspection gauges are gauges used in quality control departments to check the accuracy of manufactured parts.
• Q25: State the purpose of Inspection Gauges.
  Ans: Purpose is:

  • ➔ To ensure product quality
  • ➔ To verify production accuracy
  • ➔ To reject defective parts
• Q26: State 4 advantages of Inspection gauges.
  Ans: Advantages are:

  • ➔ High reliability in inspection
  • ➔ Ensures quality control
  • ➔ Easy to use
  • ➔ Reduces production errors
• Q27: State 2 disadvantages of Inspection gauges.
  Ans: Disadvantages are:

  • ➔ Costly compared to working gauges
  • ➔ Requires careful handling
• Q28: State the limitations of Inspection gauges.
  Ans: Limitations are:

  • ➔ Not used for production operations
  • ➔ Limited to inspection only
• Q29: What is the Reference of Master Gauges?
  Ans: Reference or master gauges are highly accurate gauges used as a standard reference for calibrating other gauges.
• Q30: State the purpose of Reference of Master Gauges.
  Ans: Purpose is:

  • ➔ To provide standard reference
  • ➔ To calibrate other gauges
  • ➔ To maintain measurement accuracy
• Q31: State 4 advantages of Reference of Master gauges.
  Ans: Advantages are:

  • ➔ Very high accuracy
  • ➔ Long-term reliability
  • ➔ Used for calibration standards
  • ➔ Ensures uniform measurements
• Q32: State 2 disadvantages of Reference of Master gauges.
  Ans: Disadvantages are:

  • ➔ Very expensive
  • ➔ Requires controlled environment
• Q33: State the limitations of Reference of Master gauges.
  Ans: Limitations are:

  • ➔ Not suitable for workshop use
  • ➔ Only used for calibration purposes
• Q34: What are Plug Gauges?
  Ans: Plug gauges are plain limit gauges used to check the internal dimensions (holes) of a workpiece to ensure they are within specified limits.
• Q35: State the purpose of Plug Gauges.
  Ans: Purpose is:

  • ➔ To check internal diameter of holes
  • ➔ To ensure GO and NO-GO conditions
  • ➔ To maintain dimensional accuracy in production
• Q36: State 4 advantages of Plug gauges.
  Ans: Advantages are:

  • ➔ Simple and easy to use
  • ➔ Quick inspection
  • ➔ High reliability in mass production
  • ➔ No skilled operator required
• Q37: State 2 disadvantages of Plug gauges.
  Ans: Disadvantages are:

  • ➔ Does not give actual measurement
  • ➔ Wear affects accuracy over time
• Q38: State the limitations of Plug gauges.
  Ans: Limitations are:

  • ➔ Only indicates pass or fail condition
  • ➔ Not suitable for precise measurement
• Q39: What are Ring Gauges?
  Ans: Ring gauges are limit gauges used to check the external diameter of cylindrical workpieces like shafts.
• Q40: State the purpose of Ring Gauges.
  Ans: Purpose is:

  • ➔ To check outer diameter of shafts
  • ➔ To ensure GO and NO-GO limits
  • ➔ To control dimensional accuracy
• Q41: State 4 advantages of Ring gauges.
  Ans: Advantages are:

  • ➔ Fast inspection
  • ➔ High accuracy in checking
  • ➔ Easy to use
  • ➔ Suitable for mass production
• Q42: State 2 disadvantages of Ring gauges.
  Ans: Disadvantages are:

  • ➔ Expensive to manufacture
  • ➔ Wear reduces accuracy
• Q43: State the limitations of Ring gauges.
  Ans: Limitations are:

  • ➔ Only used for external dimensions
  • ➔ Not suitable for all shapes
• Q44: What are Snap Gauges?
  Ans: Snap gauges are limit gauges used to check external dimensions such as thickness or diameter by allowing the workpiece to `"snap`" through.
• Q45: State the purpose of Snap Gauges.
  Ans: Purpose is:

  • ➔ To check external dimensions quickly
  • ➔ To ensure size limits in mass production
  • ➔ To improve inspection speed
• Q46: State 2 advantages of Snap gauges.
  Ans: Advantages are:

  • ➔ Very fast inspection
  • ➔ Easy to operate
• Q47: What are Radius Gauges?
  Ans: Radius gauges are precision tools used to check and measure the radius of curved surfaces or edges of a workpiece.
• Q48: State the purpose of Radius Gauges.
  Ans: Purpose is:

  • ➔ To check internal and external radii
  • ➔ To ensure correct curvature of parts
  • ➔ To inspect rounded edges in manufacturing
• Q49: State 2 advantages of Radius gauges.
  Ans: Advantages are:

  • ➔ Quick checking of radius
  • ➔ Easy to use with high accuracy
• Q50: What is Wire gauge?
  Ans: Wire gauge is a measuring instrument used to determine the diameter or thickness of wires.
• Q51: What is an Engineer's gauge?
  Ans: An engineer’s gauge is a general measuring and marking tool used in workshops for layout and inspection work.
• Q52: What is Screw Pitch gauge?
  Ans: A screw pitch gauge is a tool used to measure the pitch (distance between threads) of screws or bolts.
• Q53: What is a Feeler gauge?
  Ans: A feeler gauge is a set of thin metal strips used to measure small gaps or clearances between parts.
• Q54: What is the thickness gauge?
  Ans: A thickness gauge is a measuring instrument used to measure the thickness of materials like sheets, plates, or films.
• Q55: What is Pin gauge?
  Ans: A pin gauge is a cylindrical precision tool used to check hole diameters and calibrate measuring instruments.
• Q56: State the uses of Angle Gauges.
  Ans: Uses are:

  • ➔ Measuring angles accurately
  • ➔ Checking angular surfaces
  • ➔ Calibration of angle measuring tools
• Q57: What is the standard temperature in the metrology lab?
  Ans: The standard temperature in a metrology lab is 20°C.
• Q58: What is Gauge Tolerance?
  Ans: Gauge tolerance is the permissible variation in the size of a gauge from its standard value.
• Q59: What is a Telescoping gauge?
  Ans: A telescoping gauge is a measuring tool used to measure internal dimensions like holes and slots by expanding inside the workpiece.