National Grid Task #71 Operator excavation and
backfilling Latest Update 2025-2026 55
Questions and 100% Verified Correct Answers
Guaranteed A+
1. acceptable condition (mild corrosion)
2. rejectable condition (severe corrosion) - CORRECT ANSWER: atmospheric corrosion
can be classified as
19.5% - CORRECT ANSWER: Oxygen deficient atmosphere is less than
____________
2 feet - CORRECT ANSWER: excess spoil and material must be placed
______________ from the edge of the excavation
2 feet plus 1/2 the diameter of the pipe (NY) - CORRECT ANSWER: What is the
tolerance zone of the pipe?
20.1% , supplied air respirators - CORRECT ANSWER: If LEL levels are
_______________ or higher, __________________ must be worn
20% - CORRECT ANSWER: LEL levels must be below _______________ prior to entry
of the excavation.
200 feet - CORRECT ANSWER: anytime that excavation is planned within
___________ of a gas regulator or gate station, gas control and the instrumentation and
regulation department must be notified
811 - CORRECT ANSWER: Who do you call before the start of any excavation ?
, 811 for mark out - CORRECT ANSWER: How do you notify utilities of the intent to
excavate?
a completed job brief must be present and current standards and procedures need to be
on location - CORRECT ANSWER: What must be completed on every excavation site?
a mark out - CORRECT ANSWER: What does the state law require prior to non-
emergency excavation or digging?
BEPM - Butane, Ethane, Propane, Methane - CORRECT ANSWER: What are the
natural gases?
communication - alarm or signal lines, cables or conduits - CORRECT ANSWER:
ORANGE utility markings is
contact the environmental department to see what steps may be required next -
CORRECT ANSWER: Who do you call if you encounter contaminated soil during an
excavation?
electric - powerlines, cables, conduit, and lighting cables - CORRECT ANSWER: RED
utility markings is
every 25 feet - CORRECT ANSWER: When should you check for proper compaction in
each trench?
exposing an unknown facility during any excavation - CORRECT ANSWER: 811 and
recheck of company records are required when
____________________________________
backfilling Latest Update 2025-2026 55
Questions and 100% Verified Correct Answers
Guaranteed A+
1. acceptable condition (mild corrosion)
2. rejectable condition (severe corrosion) - CORRECT ANSWER: atmospheric corrosion
can be classified as
19.5% - CORRECT ANSWER: Oxygen deficient atmosphere is less than
____________
2 feet - CORRECT ANSWER: excess spoil and material must be placed
______________ from the edge of the excavation
2 feet plus 1/2 the diameter of the pipe (NY) - CORRECT ANSWER: What is the
tolerance zone of the pipe?
20.1% , supplied air respirators - CORRECT ANSWER: If LEL levels are
_______________ or higher, __________________ must be worn
20% - CORRECT ANSWER: LEL levels must be below _______________ prior to entry
of the excavation.
200 feet - CORRECT ANSWER: anytime that excavation is planned within
___________ of a gas regulator or gate station, gas control and the instrumentation and
regulation department must be notified
811 - CORRECT ANSWER: Who do you call before the start of any excavation ?
, 811 for mark out - CORRECT ANSWER: How do you notify utilities of the intent to
excavate?
a completed job brief must be present and current standards and procedures need to be
on location - CORRECT ANSWER: What must be completed on every excavation site?
a mark out - CORRECT ANSWER: What does the state law require prior to non-
emergency excavation or digging?
BEPM - Butane, Ethane, Propane, Methane - CORRECT ANSWER: What are the
natural gases?
communication - alarm or signal lines, cables or conduits - CORRECT ANSWER:
ORANGE utility markings is
contact the environmental department to see what steps may be required next -
CORRECT ANSWER: Who do you call if you encounter contaminated soil during an
excavation?
electric - powerlines, cables, conduit, and lighting cables - CORRECT ANSWER: RED
utility markings is
every 25 feet - CORRECT ANSWER: When should you check for proper compaction in
each trench?
exposing an unknown facility during any excavation - CORRECT ANSWER: 811 and
recheck of company records are required when
____________________________________
