EIAT and NEIEP Test Print Reading and Blueprints 1 — Questions and Answers
Question 1: On an electrical drawing, what does the symbol 'S' inside a circle typically represent?
- Smoke detector
- Single-pole switch (Correct answer)
- Speaker
- Sensor
Correct answer: Single-pole switch
A circle with 'S' is the standard symbol for a single-pole switch on electrical floor plans.
Question 2: What is the primary purpose of a riser diagram in electrical drawings?
- Show the floor plan layout
- Illustrate the vertical routing and panel distribution of electrical systems (Correct answer)
- Detail conduit fill calculations
- Show equipment grounding paths only
Correct answer: Illustrate the vertical routing and panel distribution of electrical systems
A riser diagram shows the vertical distribution of electrical power from the service entrance through panels and feeders across floors.
Question 3: On a blueprint, what does a dashed line typically represent?
- A wall
- A hidden or concealed element (Correct answer)
- A dimension line
- A north arrow
Correct answer: A hidden or concealed element
Dashed lines in architectural and electrical drawings typically indicate hidden, concealed, or below-surface elements.
Question 4: The title block of a blueprint contains:
- Only the architect's signature
- Project name, drawing number, scale, revision, and date (Correct answer)
- The material takeoff list
- The electrical load schedule
Correct answer: Project name, drawing number, scale, revision, and date
The title block is a standardized box (usually bottom right) containing project identification, drawing number, scale, revisions, and dates.
Question 5: On electrical drawings, a triangle pointing up (â–²) with a number usually indicates:
- A transformer
- A panel board reference or homerun to panel (Correct answer)
- A motor connection
- A light fixture type
Correct answer: A panel board reference or homerun to panel
An arrow or triangle with a panel and circuit designation indicates a homerun — the circuit's connection point back to the distribution panel.
Question 6: What does the term 'scale' mean on a blueprint?
- The weight of materials shown
- The ratio of the drawing size to the actual size (Correct answer)
- The elevation above sea level
- The total square footage
Correct answer: The ratio of the drawing size to the actual size
Scale is the proportional ratio between a measurement on the drawing and the actual corresponding dimension in the field.
EIAT and NEIEP Test Print Reading and Blueprints 1
On an electrical drawing, what does the symbol 'S' inside a circle typically represent?