11.16: Quiz 15-Trenching and Shorting
1. True or False...Planning for safety begins after the bidding process on a project.
2. True or False...If underground utilities are encountered in digging, the contactor must contact the utility company and inform them of the work to be done.
3. True or False...A trench is referred to as a wide excavation in which the depth is smaller than the width.
4. True or False...An excavation is any man-made cavity or depression in the earth's surface.
5. True or False...It is dangerous to allow trenches to remain not shored even if no work is being done on them.
MULTIPLE CHOICE
6. Current OSHA regulations require that all excavations over ________ feet deep be sloped, shored, sheeted, braced or otherwise supported.
a. 2 b. 3 c. 4 d. 5
7. "Angle of repose" is a method of ensuring safety in an excavation or trench by sloping the sides of the cut, to the angle of repose which is the angle closest to the
________ at which the soil will remain at rest.
a. horizontal b. perpendicular c. middle d. edge
8. A ________ must determine the proper angle of repose for the specific type of soil condition.
a. construction supervisor b. mechanic c. qualified engineer d. all of the above
9. In installing the shoring, care must be taken to place the crossbeams in true horizontal position and to space them ________ at appropriate intervals.
a. horizontally b. vertically c. perpendicular d. none of the above
10. When employees are required to be in trenches 5 feet deep or more, adequate means of exit such as a ladder or steps be provided and located so as to require no more than ________ feet lateral travel.
a. 10 b. 15 c. 20 d. 25