National Grid Task 71 Excavation & Backfilling Questions with 100% Correct Solutions

National Grid Task 71 Excavation & Backfilling Questions with 100% Correct Solutions 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