Q1: What are Angle Measuring tools?
Ans: Angle measuring tools are instruments used to measure, check, or set the angles between two surfaces or lines accurately.
Q2: Name some Angle Measuring tools.
Ans: Some angle measuring tools are:
- ➔ Protractor
- ➔ Bevel Protractor
- ➔ Sine Bar
- ➔ Angle Gauges
Q3: What is Angular measure?
Ans: Angular measure is the measurement of the opening between two lines or surfaces meeting at a point.
Q4: State the units of Angular Measure.
Ans: Units of angular measure are:
- ➔ Degree (°)
- ➔ Radian (rad)
- ➔ Minute (`'`)
- ➔ Second (`"`)
Q5: Define Acute Angle.
Ans: An acute angle is an angle that is less than 90°.
Q6: Define Right Angle.
Ans: A right angle is an angle that is exactly 90°.
Q7: Define Obtuse Angle.
Ans: An obtuse angle is an angle that is greater than 90° but less than 180°.
Q8: Define Supplementary Angle.
Ans: Supplementary angles are two angles whose sum is 180°.
Q9: Define Complementary Angle.
Ans: Complementary angles are two angles whose sum is 90°.
Q10: Define Straight Angle.
Ans: A straight angle is an angle that is exactly 180°.
Q11: State the classification of Measuring Tools.
Ans: Measuring tools are classified into:
- ➔ Linear measuring tools
- ➔ Angular measuring tools
- ➔ Direct measuring tools
- ➔ Indirect measuring tools
Q12: What are Fixed Angle Measuring Tools?
Ans: Fixed angle measuring tools are instruments used to measure or check angles that are preset or fixed and cannot be adjusted during use.
Q13: Name some Fixed Angle Measuring Tools.
Ans: Some fixed angle measuring tools are:
- ➔ Angle Gauges
- ➔ Fixed Squares
- ➔ Bevel Squares
Q14: What are Squares?
Ans: Squares are measuring tools used to check and mark right angles (90°) between two surfaces or lines in engineering work.
Q15: What are Combination Squares?
Ans: Combination squares are adjustable tools used to measure 90° angles, 45° angles, and also for marking and checking depth and height.
Q16: What are Tri-Squares?
Ans: Tri-squares are simple L-shaped tools used to check and mark right angles (90°) on a workpiece.
Q17: What are Double Squares?
Ans: Double squares are precision tools with two blades used to check and mark internal and external right angles.
Q18: What are Dimaker Squares?
Ans: Diemaker squares are high-precision squares used in tool and die making for accurate angle checking and layout work.
Q19: What are Center Squares?
Ans: Center squares are tools used to find and mark the center of circular or cylindrical workpieces.
Q20: What are Hard Steel Squares?
Ans: Hard steel squares are precision squares made of hardened steel used for accurate right-angle checking and layout work.
Q21: What are Thread Gauges?
Ans: Thread gauges are tools used to check the pitch and profile of screw threads.
Q22: What are Grinding Gauges?
Ans: Grinding gauges are used to check the shape and angle of grinding tools and ground surfaces.
Q23: What are Drill Gauges?
Ans: Drill gauges are tools used to identify and check the diameter of drill bits.
Q24: What are Wire Gauges?
Ans: Wire gauges are measuring tools used to determine the diameter or size of wires and thin sheets.
Q25: What are Adjustable Angle Measuring Tools?
Ans: Adjustable angle measuring tools are instruments used to measure and set different angles by adjusting their parts.
Q26: Name some Adjustable Angle Measuring Tools.
Ans: Some adjustable angle measuring tools are:
- ➔ Vernier Bevel Protractor
- ➔ Universal Bevel
- ➔ Combination Bevel
- ➔ Sine Bar
Q27: What is a Sine Bar?
Ans: A sine bar is a precision instrument used to measure and set angles using slip gauges based on the sine principle.
Q28: What is a Universal Bevel?
Ans: A universal bevel is an adjustable tool used to measure and transfer angles accurately in mechanical work.
Q29: What is a Combination Bevel?
Ans: A combination bevel is a tool used to set, measure, and transfer angles, especially in layout work.
Q30: What is a Bevel Protractor?
Ans: A bevel protractor is a precision instrument used to measure angles accurately in degrees.
Q31: What is a Vernier Bevel Protractor?
Ans: A vernier bevel protractor is a precision tool that uses a vernier scale to measure angles with high accuracy.
Q32: State the working principle of a Vernier Protractor.
Ans: It works on the principle of vernier scale measurement.
The main scale and vernier scale readings are combined to get precise angular measurement.
Q33: What is a Dial Protractor?
Ans: A dial protractor is an angle measuring instrument that shows readings on a dial for quick and accurate angle measurement.
Q34: What is a Steel Protractor?
Ans: A steel protractor is a simple angle measuring tool made of steel used for basic angular measurements.
Q35: What is the minimum measurement for an angle?
Ans: The minimum measurement of an angle is usually 1 minute (1`'`).
Q36: Which tools measure the angle accurately?
Ans: Accurate angle measuring tools are:
- ➔ Vernier Bevel Protractor
- ➔ Sine Bar
- ➔ Angle Gauges
- ➔ Dial Protractor
