Smart authors realize the wisdom of getting others' input on their manuscripts. Some authors use "Alpha" readers, which some define as readers who provide feedback on a story as the book is being written. Others rely on "Beta" readers, who take the finished the manuscript and comment on the whole work before it gets submitted. (And yes, the two groups can overlap.)
No matter what you label the friends and colleagues who provide feedback on your manuscripts, you need to decide what it is you're asking them to do. Unless you tell them upfront, those helpful ones won't know for sure how to help you.
I call upon different friends to read and comment on various projects. A couple are fellow authors, but not all. Successful authors are busy people, so they might know their stuff, but they have many demands on their time. I prefer to call upon well-read acquaintances who love books and can articulate what works and what does not in a story.
I don't keep a formal checklist of questions, but I here are some points I especially ask my readers to keep in mind:
Are there other points you writers request of your proofreaders? If so, please share them!
Rick Barry has freelanced hundreds of articles and short stories, had two novels published, and has more projects in the works.