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in this video were going to cover four practice problems for the water distribution operator certification exam note that this video is for anyone pursuing the first two certification levels at what depth is showing required in a trench if its excavated in soil the correct answer is C five feet or deeper so whats showing is the safety equipment thats shown in the photo with the yellow sheeting and the blue struts showing is used to prevent soil movement and cave-ins and protect the employees in the trench whenever trenches at least five feet deep and excavated in soil protective system such as showing is required note that there are other protective systems that you can use beside showing such as benching or sloping the soil or installing something called shielding which is used to protect employees in the trench so to recap shoring or another form a protective system is required if the trench is five feet or deeper a note that this rule applies to trenching and soil if a trench i
