PDH Engineer     PE PDH
PDH Online

OSHA Trenching and Excavation Safety


Quiz Questions

1.Workers have a right to file a complaint asking OSHA to inspect their workplace if they believe there is a serious hazard or that their employer is not following OSHA’s rules. OSHA will keep all identities confidential.
True
False
2. OSHA generally requires that employers protect workers from cave-ins by______________.?
Sloping and benching the sides of the excavation.
Supporting the sides of the excavation.
Placing a shield between the side of the excavation and the work area.
All the above
3.Employers must ensure that a _____________ inspects all excavations, adjacent areas, and protective systems daily for possible cave-ins, indications of failures in protective systems and equipment, hazardous atmospheres, and other hazardous Trenching and Excavation Safety 13 conditions.
Competent person
Project manager
Team lead
Construction team
4.Atmospheric testing is not required before workers enter an excavation greater than 4 feet (1.22 meters) in depth where an oxygen deficiency or a hazardous atmosphere is present or could reasonably be expected, such as in excavations in landfill areas or excavations in areas where hazardous substances are stored nearby.
True
False
5.Which of the following safety factors should be considered when bidding on a job?
Soil classification
Overhead and underground utilities
Number of ladders that may be needed
All the above
6. To determine the approximate location(s) of utility installations – including sewer, telephone, fuel, electric, and water lines. One common industry practice is to call_________ , the "Call Before You Dig" number, to establish the location of any underground utility installations in the work area.
611
711
811
911
7._____________ are responsible for maintaining materials and equipment used for protective systems. Defective and damaged materials and equipment can cause protective systems to fail and lead to other excavation hazards.
OSHA
Employers
Employees
Construction workers
8. OSHA requires employers to provide ladders, steps, ramps, or other safe means of egress for workers working in trench excavations 4 feet or deeper.
True
False
9.Which of the following doesn’t fall under the known soil classification categories?
Stable rock
Type A soil
Type Q soil
Type C soil
10. OSHA defines ____________ as any man-made cut, cavity, trench, or depression in the Earth’s surface formed by earth removal.
Excavation
Trench
Hollow
None of the above