1. The most standardized set of symbols in the United States is provided by the NEMA.
a. True
b. False
2. Normally open switches are drawn with the movable contact above and touching the stationary contact.
a. True
b. False
3. Schematics are always drawn to show components in their de-energized or off state.
a. True
b. False
4. The most common coil symbol used in schematic diagrams is the rectangle.
a. True
b. False
5. Timed contacts are either normally open or normally closed.
a. True
b. False
Name: Class: Date:
Unit 4 Symbols
6. One of the most used symbols in control schematics is the ____.
a. switch b. transformer
c. push button d. capacitor
7. The movable contact for a normally closed switch is drawn ____.
a. below but not touching the stationary contact
b. below and touching the stationary contact
c. above and touching the stationary contact
d. above but not touching the stationary contact
8. Schematics show components in their electrical sequence without regard for ____.
a. composition b. on-off state
c. in-out flux d. physical location
9. The symbol for a ____ switch represents a bimetal helix.
a. pressure b. temperature
c. flow d. liquid level
10. Mechanical connections are shown with ____.
a. straight broken lines b. a connection dot
c. a connection node d. lines crossing each other
Name: Class: Date:
Unit 4 Symbols