Chapter 3: Angle Measurement

1. What is the measurement range of an acute angle?

• 0° to 90°

• 90° to 180°

• Exactly 90°

• More than 180

2. Which angle is exactly equal to 90 degrees?

• Acute angle

• Obtuse angle

• Right angle

• Straight angle

3. What is the unit of angular measurement in the metric system?

• Degree

• Minute

• Radian

• Inch

4. How many minutes are there in 1 degree?

• 30

• 60

• 90

• 100

5. A full circle consists of how many degrees?

• 100°

• 180°

• 270°

• 360°

6. Which of the following is a precision angle measurement tool?

• Bevel Protractor

• Protractor

• Tool Microscope

• Sine bar

7. Which of these tools uses a Vernier scale to provide more precise angle readings?

• Bevel protractor

• Plate protractor

• T-bevel

• Sine bar

8. What is the purpose of gauge blocks in sine bar measurement?

• To act as a protractor

• To fix the sine bar in place

• To set a known height for angle calculation

• To support the tool microscope

9. Which tool uses optics to magnify and measure angles?

• Tool microscope

• Angle gauge

• Bevel protractor

• Plate protractor

10. What is the shape of a standard plate protractor?

• Rectangle

• Circle

• Triangle

• Semi-circle