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.
