NATIONAL GRID TASK #71 OPERATOR EXCAVATION AND
BACKFILLING EXAM WITH CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS LATEST ALREADY
GRADED A+ 2025 – 2026
Soil class is type c and its the least stable
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What type of soil class is used for national
grid and how stable is it?
BEPM - Butane, Ethane, Propane, Methane
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What are the natural gases?
for all excavations at a depth of 5 feet or more
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When is shoring mandatory?
electric - powerlines, cables, conduit, and lighting cables
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RED utility markings is
communication - alarm or signal lines, cables or conduits
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ORANGE utility markings is
gas - oil, steam, petroleum, or gaseous materials
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YELLOW utility markings is
sewer - sewers and drain lines
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GREEN utility markings is
water - potable water
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BLUE utility markings is
slurry lines - reclaimed water, irrigation or slurry lines
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PURPLE utility markings is
