Blueprint Reading & Interpretation Flashcards
7 cards from real AEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Blueprint Reading & Interpretation flashcards as text
On an AEP underground cable system drawing, 'DB' in a duct bank cross-section refers to:
Answer: Duct Bank — a concrete-encased conduit system for underground cables
DB stands for Duct Bank, a system of conduits encased in concrete used to protect and route underground power cables.
When a blueprint revision cloud with a triangle containing a revision number appears on a drawing, it indicates:
Answer: The area has been changed in that revision and the triangle identifies the revision number
A revision cloud circles the changed area on a drawing, and the delta triangle identifies which revision number introduced that change.
On a three-line diagram (three-phase schematic), which conductor is typically shown as a dashed line to distinguish it from phase conductors?
Answer: The neutral conductor
The neutral conductor is conventionally drawn as a dashed line on three-line diagrams to visually distinguish it from the three solid-line phase conductors.
In utility electrical drawings, 'ROW' dimensions shown on transmission line plan-profile drawings refer to:
Answer: Right-Of-Way width, the legal corridor where the utility has easement rights
ROW stands for Right-Of-Way, the legal corridor of land over which the utility holds easement rights to construct and maintain transmission infrastructure.
On a conduit and cable tray layout drawing, 'LB' at a conduit fitting location refers to:
Answer: A conduit body with access at the back of a 90-degree turn (L-body/back entry)
LB designates a conduit body style with an outlet opening on the back of a 90-degree elbow, used for pulling wire around turns in conduit systems.
On a protection single-line diagram, the ANSI device number '52' designates which device?
Answer: AC circuit breaker
ANSI device number 52 per IEEE C37.2 designates an AC circuit breaker — one of the most commonly referenced device numbers in power system protection drawings.
What does a 'match line' on a large-scale blueprint drawing indicate?
Answer: A line showing where one drawing sheet ends and the adjacent drawing sheet begins
A match line (or cut line) marks where a large drawing has been divided across multiple sheets, with references indicating which sheet continues the drawing.