Here are the answers to the questions based on general wood working safety and practices:
Question 16: Never saw through ______________ knots.
Answer: A. tight
Question 17: Keep fingers at least _________ inch/inches from the moving blade of a band saw.
Answer: C. 3
Question 18: _____________ extension cords should be used when plugs are designed for three wire connections.
Answer: B. Grounded or 3 prong
Question 19: Safety glasses will be worn when?
Answer: B. Always
Question 20: When using a portable belt sander, work with the cord _______________, so that the sander doesn't run over it.
Answer: A. over your shoulder