BGE Blueprint Reading & Interpretation 2 — Questions and Answers
Question 1: On a gas distribution blueprint, a dashed line typically represents which of the following?
- An active high-pressure main
- An underground or hidden line (Correct answer)
- A future planned installation
- A decommissioned service line
Correct answer: An underground or hidden line
Dashed lines on utility blueprints indicate features that are hidden from view, such as underground pipes or conduits.
Question 2: What does the abbreviation 'ROW' stand for on a BGE pipeline blueprint?
- Regulator Output Width
- Right-of-Way (Correct answer)
- Riser on Wall
- Recorded Operating Wattage
Correct answer: Right-of-Way
ROW stands for Right-of-Way, designating the corridor of land where BGE has legal authority to install and maintain utility infrastructure.
Question 3: A blueprint shows a gas main crossing a waterway with a notation 'H.D.D.' What does this indicate?
- High Ductility Design
- Horizontal Directional Drill (Correct answer)
- Hydraulic Depth Detection
- Heavy Duty Diameter
Correct answer: Horizontal Directional Drill
H.D.D. stands for Horizontal Directional Drill, a trenchless installation method used to bore under obstacles like rivers or roads.
Question 4: When reading an isometric drawing of a gas piping system, what does it show that a standard plan view does not?
- Material specifications
- Three-dimensional spatial relationships of pipes (Correct answer)
- Pressure ratings of fittings
- Soil classification data
Correct answer: Three-dimensional spatial relationships of pipes
Isometric drawings represent a 3D view of piping systems, showing elevation changes and directional turns that a flat plan view cannot convey.
Question 5: On a BGE electrical distribution drawing, what does the symbol of a circle with an 'X' inside typically represent?
- A transformer
- A fuse or cutout (Correct answer)
- A junction box
- A streetlight
Correct answer: A fuse or cutout
A circle with an X inside is a common symbol for a fuse or fused cutout on electrical distribution single-line diagrams.
Question 6: A drawing revision block shows 'Rev C – 03/15/2025 – Added service lateral.' What should a technician do before using this drawing in the field?
- Use the previous revision as a backup
- Verify they have Rev C and not an older version (Correct answer)
- Request a new drawing from engineering
- Disregard revisions if the original was approved
Correct answer: Verify they have Rev C and not an older version
Technicians must always confirm they are working from the latest revision to ensure field work reflects the most current design.
Question 7: What is indicated by a 'BV' notation on a gas distribution system blueprint?
- Back Vent
- Ball Valve (Correct answer)
- Branch Volume
- Bottom View
Correct answer: Ball Valve
BV on gas distribution blueprints stands for Ball Valve, indicating the location of an isolation valve on the pipeline.
BGE Blueprint Reading & Interpretation 2
On a gas distribution blueprint, a dashed line typically represents which of the following?