Symbols, Conventions, and Abbreviations Flashcards
? are marks or letters standing for an object or process.
Symbols
? are customary practices.
Conventions
? are shortened forms of words or phrases.
Abbreviations
Standards are never fixed and inflexible because new symbols are being added all the time. T or F
True
National Electrical Contractors Association (NECA) are active in publishing and distributing standard graphic symbols for everyone who needs them. T or F
True
? are usually added to a basic symbol in order to clarify what is needed.
Variations or Attachments
? symbols are normally used when indicating steel members.
Structural
? is a method used for exposing the inside of an object as though it has been chipped or cut through.
A section
? are also used to show depths of drilled holes in general and the thickness of walls, partitions, and other shapes.
Sections
? at the ends of the cutting plane line show the direction in which the section is viewed.
arrows
the two general classifications of electrical symbols are ? and ?
Standard/Complete or One-line
drawings or diagrams show each wire that an assembly or arrangement requires.
Standard/Complete
Standard/complete drawing symbols are used only when there are special details that need to be shown. T or F
True
? drawings or diagrams are simplified versions of complete diagrams in which the same circuit is indicated by a single line representing all three wires.
One-line
The symbols shown are used on the ? to show right-of-way, access roads, steel or wood structures, and the line itself.
Plan
The ? shows elevations, structure sites, kinds of timber, cultivated areas, and creeks or rivers in relation to the profile of the line.
Profile
? are practices that have been adopted to represent symbols used with other basic symbols to further identify or limit the rating, capacity, size, or other governing factors of a device.
Conventions
Threaded bolts and rods are drawn with ? symbols.
Mechanical
Symbols used to represent concrete, gravel, or sand are examples of ? symbols.
Architectual
The letters at the ends of the cutting plane line show the direction from which the section is viewed. T or F
False, those are arrows
The broken line on the drawing is the high side of the profile; this is the contour of the terrain directly under the outside conductor of the line. T or F
True
