Another word for grader

There were people in the lobby, ahead of me but I blurted out my question like a third grader with a bladder problem.

The Association sponsors a 4th and 5th grade snow pass during which 4th and 5th grader students are given the opportunity to learn to ski or snowboard at 21 of the state's ski resorts at no charge.

A professional grader examines the diamond under 10X magnification to identify inclusions and assign a clarity grade based on how easy it is to see any blemishes in the stone.

A trained grader will compare a diamond's color by hand using a set of master stones in each of the letter categories.

Royal Asscher diamond rings also always come with a certificate of authenticity from an independent jewelry grader, such as the Gemological Association of America (GIA).