Trenches _____ depth or Confined Spaces must be monitored before entry. Safe oxygen levels are
________ - 4' 19.5% - 23.5%
Trenches _____ deep or greater require a protective system which can be sloping, benching, trench
boxes - 5'
Trenches _____ deep or greater require a protective system desi...
API 1169 Exam with Questions &
Answers| Passed
Trenches _____ depth or Confined Spaces must be monitored before entry. Safe oxygen levels are
________ - ✔✔4' 19.5% - 23.5%
Trenches _____ deep or greater require a protective system which can be sloping, benching, trench
boxes - ✔✔5'
Trenches _____ deep or greater require a protective system designed by a PE - ✔✔20'
4 soil types and sloping - ✔✔1. Rock=90 deg. or vertical 2. Type A=3/4:1 or 53 deg. 3. Type B=1.1 or
45 de. 4. Type C= 1 1/2:1 or 34 deg.
Trench Boxes must extend ____above outside soil level - ✔✔18"
In 29 CFR 1910 subpart ___ covers excavations - ✔✔P
Encroachment Area - ✔✔Area where the ground disturbance occurs within 50' of centerline of
ROW, facility or easement
Active Excavation Area - ✔✔Area where the edge of the disturbance is within 25' of centerline of
existing facilities
Excavation Tolerance Zone - ✔✔Area within 24" of facilities or the distance mandated by state law,
whichever is greater. NOTE: CGA & INGAA says 18".
When an excavation is within _____ of a pipeline facility an OQ qualified representative shall be
continuously present during all excavation and backfilling activities to ensure that criteria is being met. -
✔✔10'
, INGAA states that crossing company shall not permit soil disturbance within ____ of the centerline of
existing pipeline facilities without an owners rep being present. - ✔✔25'
Crossing angle - ✔✔As close to perpendicular as possible
ROW is established thru a written document known as the - ✔✔Easement
Plan devised between the Owner and crossing party to specify the details and provisions under
which the crossing construction shall occur - ✔✔Crossing plan
Hearing protection required in areas ____________ - ✔✔Noise level exceeds 85 dba over an 8 hour
period. INGAA states during pressure testing to keep under 80 dba's
Flammable Liquids - ✔✔Class 1 liquids having a flash point below 100 deg F. Gasoline.
Combustible Liquids - ✔✔Class 2 liquids having a flash point above 100 deg F. Diesel, jet fuel
motor oil
Hydro test parameters per 49 CFR 195 - ✔✔4 hrs @ 125% Max Operating Pressure for above
ground pipe. 8 hrs @ 110% MOP.
Remain _______ from any pipe being hydro-tested - ✔✔100'
Valve locations per CFR 195 - ✔✔Each side of a water crossing that is more than 100' wide from
high water mark to high water mark. Unless the Administrator finds they are not justified.
Phases of Pipeline Construction - ✔✔1. Survey 2. Clearing and grading 3. Stockpiling and stringing 4.
Field bending 5. Ditching and excavation 6. Welding 7. Coating 8. Lowering In. 9. Backfilling 10.
Cathodic Protection 11. Hydrostatic testing 12. Clean up and restoration
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