Question 2 should be 2 instead of 1
Question 5 should be 1
Question 10 should be 1 
 
        
                    
             
        
        
        
Answer:
A gear is a rotating circular machine part having cut teeth or, in the case of a cogwheel or gearwheel, inserted teeth (called cogs), which mesh with another toothed part to transmit torque. A gear may also be known informally as a cog.
 
        
             
        
        
        
Answer:
I would believe it to be 3 and 4.
Explanation:
I don't see why OSHA, the people dealing with work safety, would care about a conversation had along those lines....and citing a conversation as day-job experience just doesn't make sense to me.