Question

which tool should be used when checking a window opening for squareness? laser level plumb bob framing square combination square

Explanation:

A framing square is a tool used in construction to check for squareness. It has a right - angled (90 - degree) corner which is ideal for verifying if a window opening (or any rectangular structure) has right angles. A laser level is used for leveling, a plumb bob is used to find vertical alignment, and a combination square has multiple functions but is not the primary tool for checking squareness of a large opening like a window.

Answer:

framing square