Hi: I wrote my C of Q 4 years ago, and the best advice I can give is to pull out the Krarr/Oswald texbook titled Modern Machining, that you probably used during your school.
Study it from front to back. I found alot of questions were based on the texbook, but then again most machining textbooks (general) will cover the same categories.Here's what I can tell you:
1 Know the correct hole sizing for machine reamers below 1/2 inch and above 1/2 inch.
2.Be able to calculate machining times.
3.Know how to calculate feeds and speeds.
4 Be able to figure out when a steardy rest or steady follow needs to be used.
read the texbook, and memorize the basic rules/guidlines, and you'll be fine.
PS, if you ask they will provide you with a sample of the questions that may be asked. I was given this info when I asked a few yrs. ago. It broke the exam into 8 or 10 different categories, and listed some typical questions/required knowledge in each category. Be able to answer those types of questions, and you will do well.
regards
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Can't Fix Stupid