QUESTIONS ANSD SOLUTIONS RATED A+
✔✔Benching - ✔✔A method of protecting workers from cave-ins by excavating the
sides of an excavation to form one or a series of horizontal levels or steps, usually with
vertical or near-vertical surfaces between levels.
✔✔Sloping - ✔✔Cutting the trench walls to make an incline
✔✔Shoring - ✔✔Installing supports inside of a trench to prevent cave-ins
✔✔Shielding - ✔✔Protecting workers by using trench boxes
✔✔At what depth must a licensed engineer design a trench protective system - ✔✔20
Feet
✔✔When do you inspect a trench - ✔✔At the start of the shift/after a storm
✔✔At what depth do you test for atmospheric hazards in a trench - ✔✔4 Feet
✔✔What do cracks in the soil indicate? - ✔✔The trench may collapse
✔✔OSHA requires a protection system when a trench is: - ✔✔Greater then 5 feet deep
✔✔The first number in a slope ratio represents: - ✔✔Horizontal plane
✔✔The second number in a slope ration represents - ✔✔Vertical Plane
✔✔Digsafe markings are valid for - ✔✔30 Days
✔✔Preventing a state agent from doing their jobs will result in a fine of - ✔✔$3000
✔✔How much does a cubic foot of soil weigh? - ✔✔114 Lbs
✔✔How far away must a spoil pile be from the edge of a trench? - ✔✔2 Feet
✔✔What Mass Law covers hoisting - ✔✔520 CMR 6.00
✔✔What Mass Law covers welding and cutting on hoisting equipment? - ✔✔Section IX
of ASME code 520 CMR
✔✔How far above a trench must a ladder extend? - ✔✔3 Feet