National Grid Task 71 Excavation & Backfilling Questions with Verified 100% Correct
Answers
Soil class is type c and its the least stable - (answer)What type of soil class is used for national grid and
how stable is it?
BEPM - Butane, Ethane, Propane, Methane - (answer)What are the natural gases?
for all excavations at a depth of 5 feet or more - (answer)When is shoring mandatory?
electric - powerlines, cables, conduit, and lighting cables - (answer)RED utility markings is
communication - alarm or signal lines, cables or conduits - (answer)ORANGE utility markings is
gas - oil, steam, petroleum, or gaseous materials - (answer)YELLOW utility markings is
sewer - sewers and drain lines - (answer)GREEN utility markings is
water - potable water - (answer)BLUE utility markings is
slurry lines - reclaimed water, irrigation or slurry lines - (answer)PURPLE utility markings is
temporary survey markings - (answer)PINK utility markings is
proposed excavation - (answer)WHITE utility markings is
white proposed excavation, pink temp survey and purple slurry, reclaimed and grey water and
radioactive lines - (answer)Which utility markings are seen but not as prominent?
on 6" lifts - (answer)when are pneumatic tamper and pavement breaker tamping foot used?
Answers
Soil class is type c and its the least stable - (answer)What type of soil class is used for national grid and
how stable is it?
BEPM - Butane, Ethane, Propane, Methane - (answer)What are the natural gases?
for all excavations at a depth of 5 feet or more - (answer)When is shoring mandatory?
electric - powerlines, cables, conduit, and lighting cables - (answer)RED utility markings is
communication - alarm or signal lines, cables or conduits - (answer)ORANGE utility markings is
gas - oil, steam, petroleum, or gaseous materials - (answer)YELLOW utility markings is
sewer - sewers and drain lines - (answer)GREEN utility markings is
water - potable water - (answer)BLUE utility markings is
slurry lines - reclaimed water, irrigation or slurry lines - (answer)PURPLE utility markings is
temporary survey markings - (answer)PINK utility markings is
proposed excavation - (answer)WHITE utility markings is
white proposed excavation, pink temp survey and purple slurry, reclaimed and grey water and
radioactive lines - (answer)Which utility markings are seen but not as prominent?
on 6" lifts - (answer)when are pneumatic tamper and pavement breaker tamping foot used?
