On electrical drawings, a circle with the letter 'S' inside typically indicates what type of device?
Correct Answer
B) Switch
A circle with an 'S' is the standard electrical symbol for a switch. Different variations of this symbol indicate different types of switches (single pole, three-way, etc.).
Why This Is the Correct Answer
A circle with the letter 'S' inside is the universally recognized electrical symbol for a switch according to standard electrical drawing conventions. This symbol is used consistently across all electrical blueprints and construction documents. The 'S' stands for 'switch' and variations of this basic symbol (like S3 for three-way switches) are used to indicate different switch types. This standardization ensures clear communication between electricians, contractors, and other trades on construction projects.
Why the Other Options Are Wrong
Option A: Speaker
Security devices have their own specific symbols and are usually labeled with abbreviations like 'SEC', 'PIR' for motion detectors, or other security-specific designations
Option D: Smoke detector
Smoke detectors are typically represented by a different symbol, usually a circle with 'SD' inside or a specific smoke detector icon, not just a single 'S'
Memory Technique
Think 'S in a circle = Switch' - the letter directly corresponds to the first letter of the device name for the most basic electrical components
Reference Hint
Check the electrical symbols section in your construction reference manual or the electrical code book's appendix for standard electrical symbols
More Project Mgmt Questions
What is the minimum R-value required for wall insulation in Florida Climate Zone 2?
A subcontractor brings a new chemical product to your jobsite. Under the Globally Harmonized System (GHS), what information must be immediately available to workers?
A construction site has a trench that is 8 feet deep in Type B soil. What is the maximum allowable slope ratio for the trench walls without protective systems?
What is the maximum recommended spacing between drywall screws when attaching to wood studs?
Your crew discovers suspected asbestos-containing materials during a renovation project. What is the first action you should take?
A scaffold platform is 12 feet long and 5 feet wide. If the maximum load capacity is 25 pounds per square foot, what is the total weight capacity of this platform?
Which CSI MasterFormat Division would contain specifications for fire-stopping and firesafing materials?
In tilt-up concrete construction, what is the primary advantage of this method over conventional cast-in-place construction?
Which OSHA standard specifically addresses construction industry safety and health regulations?
A structural drawing shows a beam labeled 'W12x26'. What does the '26' represent?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass