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COSC 325 Houston (Electrical) Exam/138 Questions with 100% Accurate Answers
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COSC 325 Houston (Electrical) Exam/138 Questions with 100% Accurate Answers
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COSC 325 Houston (Electrical) Exam/138Questions with 100% Accurate Answers
What does OH stand for? - - Overhead eletrical
- What does UG stand for? - - Underground Eletrical
- What is the common residential electrical service amperage? - - -200A
- What is the common commercial electrical service amperage? - - 400A+
- What does LOTO stand for? - - Lock Out Tag Out
- What is the whole electrical system? - - 1. Generation (power plant)
2. Step up station
3. Transmission lines (big power line towers)
4. Substations
5. Distribution Lines (OH or UG line)
6. Weather Head
7. Meter
8 .Distribution Panel
9. End use
- What do substations do? - - Step voltage down to distribution voltage
- What are the two types of XFMR? - - Overhead XFMR
Pad mount XFMR
- What does OH1 stand for? - - Overhead Primary
- What is the voltage in OH1 lines? - - 12,000 volts
- What does OH2 stand for? - - Overhead Secondary
- What is a transform similar to? - - Regulator
- Saying for electrical wiring? - - Higher voltage is a smaller wire
The lower voltage is bigger wire
- What is a 3-phase serivce? - - A power pole with three OH1, and three
XFMR, and three OH2
- What do XFMR do? - - They step down electricity
, - What are the large black wire that are low on the pole? - - Communication
line
- What are guy-wires? - - A tensioned cable designed to add stability to a
free-standing structure
- What is a gutter/wire way/through? - - It is a long metal rectangle in the
middle of the electrical service equipment.
- What are the types of OH phases? - - OH 1-phase
OH 3-phase
- What does OH1 to UG1 mean? - - Overhead primary to underground
primary
- How to tell the difference between a XFMR and a pullbox? - - XFMR
hummm
- What does kVA stand for? - - Kilovolt amps
- What is volts like in water? - - Volts is water pressure
- What is amps like in water? - - Amps are the flow
- What does a disconnect do? - - A way to turn off power
- What does Vac stand for? - - Voltage Alternating Current
- What is the voltage in building? - - Alternating Current
- What kind of voltage is in batteries? - - Direct Current (DC)
- What is HZ? - - The frequency of the electrical power
- What does HZ stand for? - - Hertz
- What are the types of steel conduit? - - PVC
RMC
EMT
- What color is electrical conduit? - - Grey
- What are the characteristic of PVC conduit? - - Cheap
Easy to install
Corrosion Resistant
Used in underground situations (UG)
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