Which one of the following is not an angle measuring devicea)bevel pro...
Explanation:
An angle measuring device is a tool or instrument that is used to measure or determine the angle between two lines or surfaces. It is an essential tool in various industries and fields, including mechanical engineering.
Let's analyze each option to determine which one is not an angle measuring device:
a) Bevel Protector:
- A bevel protector is a tool used to measure and transfer angles. It consists of a protractor-like device with a level vial attached to it.
- It is used to measure and transfer angles accurately, making it a useful angle measuring device.
b) Sine Bar:
- A sine bar is a precision measuring instrument used to measure angles by utilizing the trigonometric relationship between the length of the sine of an angle and the length of the opposite side of a right triangle.
- It is commonly used in machining operations to set up the workpiece at a specific angle.
c) Angle Gauge Blocks:
- Angle gauge blocks, also known as angle blocks or angle plates, are precision ground blocks of metal that are used to set up and measure angles.
- They are available in various sizes and angles and are used in conjunction with other measuring tools to accurately determine and set angles.
d) Angle Iron:
- Angle iron is a structural steel or aluminum piece that has a right angle shape, similar to the letter 'L'.
- While angle iron is a commonly used material in construction and fabrication, it is not primarily used as an angle measuring device.
Therefore, the correct answer is option 'D' - Angle Iron. It is not an angle measuring device but a structural component.