146 S4 Grounding electrodes

What does single-point grounding mean?

• A) Grounding multiple points independently
• B) Grounding all systems at a single point
• C) Grounding systems in series only
• D) Grounding systems in parallel only

In series single-point grounding, how are devices connected?

• A) In parallel
• B) In a star configuration
• C) In series, i.e., in a line
• D) Independently

In parallel single-point grounding, how are devices connected?

• A) In series
• B) To a single earth point, but not to each other
• C) To each other and then to the earth
• D) Independently grounded

What is the purpose of an earth well?

• A) To provide a high potential point
• B) To act as a drain for any current appearing in the earthing system grid during a fault
• C) To connect multiple grounding systems
• D) To measure soil conductivity

Which component is not part of an earth well?

• A) Earth Rod
• B) Earthing Clamp
• C) Grounding Conductor
• D) Earth Pit Cover

What is an earth access pit?

• A) A large pit for placing multiple earth rods
• B) A small pit-like space over the earth well for accessing the earth rod
• C) A conduit for electrical cables
• D) A measurement tool for soil conductivity

What is the function of an inspection pit?

• A) To house electrical equipment
• B) To access the ground conductor for measuring electrical resistance
• C) To connect multiple grounding systems
• D) To store grounding materials

What type of earth pit is used in areas of high vehicular traffic?

• A) Lightweight Duty
• B) Heavy Duty
• C) Standard Duty
• D) Medium Duty

Which material is not used for earth pit fabrication?

• A) Polymer Concrete
• B) HDPE (High Density Polyethylene)
• C) Aluminum
• D) Lightweight Polymer Concrete

Why are the side walls of earth pits made of insulating material?

• A) To prevent heat loss
• B) To isolate the earth rod's top connection from the surrounding soil
• C) To increase the strength of the pit
• D) To reduce costs