National Grid Task 71 Operator Excavation and Backfilling Practice Test

These questions are part of the practice quiz. Start practicing

• Which of the following best describes a mild atmospheric corrosion condition?
• Who do you always call before you start any digging or excavation?
• Excess spoil must be placed how far from edge of the excavation?
• What LEL level triggers the use of a supplied air respirator prior to entry?
• During inspection, a surface shows mild corrosion; how should it be classified?
• Who must be notified when an excavation is planned within 200 feet of a gas regulator or gas station?
• At what trench depth is a ladder required?
• If part of the pavement where excavation is performed becomes undetermined, this portion must be removed or shoring will need to be installed.
• Which color denotes gas and other petroleum or gaseous materials in utility markings?
• Which arrangement lists the two actions required when exposing an unknown facility?
• A component exhibits mild corrosion; classify accordingly.
• When does state law require a mark out?
• Why should you use caution whenever digging in the area of a plastic pipe?
• When is shoring mandatory?
• What does a job brief include?
• When part of the excavation is undermined, which action is required?
• When should you be using the vacuum method and hand digging?
• For maintenance planning, a finding of severe corrosion is categorized as which?
• What soil class is used by National Grid and how stable is it?
• Which document must be completed on every excavation site?
• Who is required when exposing an unknown facility during any excavation?
• Pneumatic tamper and pavement breaker tamping foot are used for which lift thickness?
• Which color marking is used for slurry lines such as reclaimed water or irrigation?
• For maintenance planning, a finding of mild corrosion is categorized as which?
• At what trench depth is shoring required?
• Which items should a job brief specify?
• If a trench is exactly 5 feet deep, which safety feature is required?
• Vibratory plate compactor and percussive whacker rammer are used for which lift thickness?
• Does the state law require a markout prior to non-emergency excavation or digging?
• Which color marks temporary survey markings?
• Which color marks proposed excavation?
• Which of the following is NOT among the five most common utility marking systems?
• 811 and recheck of company records are required when exposing an unknown facility during any excavation. Which of the following actions is correct?
• Excess spoil and material must be placed how many feet from the edge of the excavation?
• Oxygen-deficient atmosphere is defined as less than what percent oxygen?
• Which label corresponds to a mild level of atmospheric corrosion?
• Oxygen deficient atmosphere is less than ______?
• Why should you use caution digging in areas with plastic pipes?
• If contaminated soil is encountered during excavation, who should you contact?
• If hazardous soil is encountered during excavation, which department should be notified?
• What do ORANGE utility markings indicate?
• What action is required if a third party is found working around transmission lines without a proper mark out?
• Which department must be notified if excavation is within 200 feet of a gas regulator?
• What does state law require prior to non-emergency excavation or digging?
• Which option lists BEPM, the natural gases?
• Which color denotes sewer lines in utility markings?
• Who do you call if you encounter contaminated soil during an excavation?
• Which of the following is one of the five utility marking systems?
• If LEL levels are 20.1% or higher, what must be worn?
• A surface with severe corrosion is categorized as what?
• Which statement correctly describes when a ladder is required in a trench?
• Which term best describes atmospheric corrosion that is considered acceptable due to its mild level?
• Which color marking indicates electric utilities?
• If part of the payment for the excavation is undermined, what must be done?
• What term describes the process of identifying underground utilities before digging?
• What is the primary purpose of the mark out process?
• What should you do if a third-party was found to be working around transmission lines without a proper mark out?
• What best describes a job brief?
• Which color marking is typically used for water lines, including potable water?
• Which color denotes slurry lines, including reclaimed water and irrigation?
• Who is responsible for preserving the mark out?
• What size lifts should be used with a vibratory plate compactor and a percussive whacker rammer?
• Which condition triggers removing or shoring of pavement?
• Which statement about the soil classification used by National Grid is true?
• What are the natural gases?
• How often should trench compaction be checked?
• Which color marking denotes sewer lines?
• What number should be dialed to notify utilities before excavating?
• Which color marks gas lines or similar utilities?
• Which option lists all four items that must be included in a job brief?
• Which label corresponds to a severe level of atmospheric corrosion?
• Who is responsible for preserving the mark out?
• Which statement correctly describes the tolerance distance around a buried pipe?
• A job briefing includes which items?
• Oxygen deficient atmosphere is less than ______
• What defines the tolerance zone around a buried pipe in New York?
• Who do you call before the start of any excavation?
• Which color denotes potable water in utility markings?
• Which color denotes slurry lines such as reclaimed water or irrigation?
• What immediate action is required when someone is found around transmission lines without proper mark out?
• In atmospheric corrosion assessment, a condition described as mild is classified as which of the following?
• If corrosion is described as severe, it falls into which classification?
• What must be completed on every excavation site?
• Which of the following is not required on a job brief?
• When is a ladder required in a trench?
• Within how many feet must the gas control and instrumentation and regulation department be notified?
• LEL levels must be below what percentage prior to entry of the excavation?
• If utilities are undermined, they will require which of the following?
• If utilities are undetermined, they will require ______ and ______
• What do RED utility markings indicate?
• What soil type does National Grid classify all soil as?
• What is the required action when utilities are undermined?
• What action is required when exposing an unknown facility during excavation?
• A component exhibits severe corrosion; classify accordingly.
• During inspection, a surface shows severe corrosion; how should it be classified?
• Which color marks temporary survey markings?
• Which distance rule applies to spoil from edge?
• For safe excavation, how far should spoil be kept from the trench edge?
• Shoring is mandatory for all excavations at or above what depth?
• Which classification applies to atmospheric corrosion described as severe?
• What is the tolerance zone of the pipe?
• Proper compaction in each trench should be checked every ———- ft
• What document must be completed on every excavation site?
• When is a ladder required in a trench?
• A surface showing only mild corrosion should be categorized as what?