Which of the following is NOT a function of the spirit level measuring instrument?

Explanation:

Spirit Level Measuring Instrument

• A spirit level, also known as a bubble level or simply a level, is a measuring instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb). It is widely used in construction, carpentry, and engineering to ensure proper alignment and accuracy during measurements and installations.
• A spirit level consists of a sealed tube filled with a liquid (commonly alcohol or a similar substance) and a bubble of air trapped inside. The tube is slightly curved, and when the spirit level is placed on a surface, the bubble moves to the highest point of the tube. When the bubble is centered between the marked lines on the tube, it indicates that the surface is level or plumb.

Functions of a Spirit Level:

• Determining whether a surface is horizontal or vertical.
• Checking the flatness or straightness of a surface.
• Measuring angles in some advanced spirit levels equipped with angular measurement features.
• Ensuring alignment and proper installation of machine parts or construction materials.

Surface Roughness:

• Surface roughness refers to the texture or irregularities present on a surface, usually measured in terms of the height, depth, and spacing of these irregularities. This measurement requires specialized instruments such as a profilometer or surface roughness tester, which are capable of detecting minute variations in surface texture.