National Grid Task #71 Operator
excavation and backfilling
Soil class is type c and its the least stable - //correct answer//-What type of soil class is
used for national grid and how stable is it?
BEPM - Butane, Ethane, Propane, Methane - //correct answer//-What are the natural
gases?
for all excavations at a depth of 5 feet or more - //correct answer//-When is shoring
mandatory?
electric - powerlines, cables, conduit, and lighting cables - //correct answer//-RED utility
markings is
communication - alarm or signal lines, cables or conduits - //correct answer//-ORANGE
utility markings is
gas - oil, steam, petroleum, or gaseous materials - //correct answer//-YELLOW utility
markings is
sewer - sewers and drain lines - //correct answer//-GREEN utility markings is
water - potable water - //correct answer//-BLUE utility markings is
slurry lines - reclaimed water, irrigation or slurry lines - //correct answer//-PURPLE utility
markings is
temporary survey markings - //correct answer//-PINK utility markings is
proposed excavation - //correct answer//-WHITE utility markings is
white proposed excavation, pink temp survey and purple slurry, reclaimed and grey
water and radioactive lines - //correct answer//-Which utility markings are seen but not
as prominent?
on 6" lifts - //correct answer//-when are pneumatic tamper and pavement breaker
tamping foot used?
