AEP Blueprint Reading & Interpretation 2

Question 1

On an electrical single-line diagram, what does a circle with an 'X' inside typically represent?

Accepted Answer

A fuse or fusible device

Answer

A circle with an 'X' inside is the standard symbol for a fuse or fusible element on electrical single-line diagrams.

Question 2

In a P&ID (Piping and Instrumentation Diagram), what does the acronym 'PSV' stand for?

Accepted Answer

Pressure Safety Valve

Answer

PSV stands for Pressure Safety Valve, a critical safety device that automatically releases pressure when it exceeds a set point.

Question 3

What does a dashed line between two components on an electrical schematic typically indicate?

Accepted Answer

A mechanical linkage or enclosed unit boundary

Answer

Dashed lines on electrical schematics typically represent a mechanical linkage between components or the boundary of an enclosed equipment package.

Question 4

On a utility distribution blueprint, a conductor shown with three short diagonal tick marks indicates:

Accepted Answer

A three-phase conductor

Answer

Three diagonal tick marks (slash marks) across a conductor line indicate a three-phase circuit on electrical distribution drawings.

Question 5

Which view in a blueprint set shows the building or structure as seen from directly above?

Accepted Answer

Plan view

Answer

A plan view (also called a floor plan) is a top-down orthographic projection showing the layout as seen from directly above.

(AEP) American Electric Power Practice Test