COSC 325 - Electrical, COSC 325 - Electrical
Exam 2025 COMPREHENSIVE EXAM
QUESTIONS |FREQUENTLY TESTED
QUESTIONS VERIFIED SOLUTIONS (100%
CORRECT)
What does OH1 stand for ? - ANSWERSOver head primary, handles higher voltage; usually the thinner cable.
What does OH2 stand for? - ANSWERSOver head secondary, handles lower voltage, usually thicker.
What is a XFMR? - ANSWERSTransformer
What does the Transformer do? - ANSWERSSteps down the voltage.
What does a a weather head do? - ANSWERSKeep elements off from connection, basically for protection.
Usually protecting a OH2 connection.
What is a guy wire? - ANSWERSIt is a cable just for support.
What is the difference between OH 3-phase and OH 1-phase - ANSWERS3-phase has three transformers and 1-
phase has 1 transformer.
What is the equation for POWER ? - ANSWERSPower(watts) = Volts x Amps
Disconnects contain ? - ANSWERSrating and alternating current.
What is a gutter? - ANSWERSIs like a tray to run wire to the rest of the disconnects
, What is conduit ? - ANSWERSraceways; pathway for wire to go in.
PVC Conduit - ANSWERSLow cost, Easy to work, It is corrosion resistant, Typically underground, but not so
much for overground.
EMT Conduit - ANSWERSElectrical metallic tubing, more costly than pvc, can't be bent that easily, galvanized
but not suited for underground, usually located indoor where not exposed to the elements, does not stand to
moisture too good.
How do you join EMT? - ANSWERSCompression, or set screws.
What does IMC and RMC stand for ? - ANSWERSIMC=Intermediate metal conduit
RMC=Rigid metal conduit
IMC/RMC - ANSWERSRMC=Thickest IMC=is in between when it comes to thickness.
Highest cost of material and cost
Does better at taking damage and can be found in parking garages, but still not underground.
They will always be be threaded connections.
What must IMC/RMC have when going underground? - ANSWERSThey must be wrapped in vinyl to prevent
corrosion.
What is a LB (Line Box) - ANSWERSPull point and a place to make a hard change in direction. Usually a 90
degree bend.
What is another name for a gutter? - ANSWERSThroft or waterway
What are junction boxes for? - ANSWERSPull points, protection for wire connections, change in direction,
reset the angle to 0 degrees; 360 degree
Conductor - ANSWERSAllows electricity to pass through easily
Exam 2025 COMPREHENSIVE EXAM
QUESTIONS |FREQUENTLY TESTED
QUESTIONS VERIFIED SOLUTIONS (100%
CORRECT)
What does OH1 stand for ? - ANSWERSOver head primary, handles higher voltage; usually the thinner cable.
What does OH2 stand for? - ANSWERSOver head secondary, handles lower voltage, usually thicker.
What is a XFMR? - ANSWERSTransformer
What does the Transformer do? - ANSWERSSteps down the voltage.
What does a a weather head do? - ANSWERSKeep elements off from connection, basically for protection.
Usually protecting a OH2 connection.
What is a guy wire? - ANSWERSIt is a cable just for support.
What is the difference between OH 3-phase and OH 1-phase - ANSWERS3-phase has three transformers and 1-
phase has 1 transformer.
What is the equation for POWER ? - ANSWERSPower(watts) = Volts x Amps
Disconnects contain ? - ANSWERSrating and alternating current.
What is a gutter? - ANSWERSIs like a tray to run wire to the rest of the disconnects
, What is conduit ? - ANSWERSraceways; pathway for wire to go in.
PVC Conduit - ANSWERSLow cost, Easy to work, It is corrosion resistant, Typically underground, but not so
much for overground.
EMT Conduit - ANSWERSElectrical metallic tubing, more costly than pvc, can't be bent that easily, galvanized
but not suited for underground, usually located indoor where not exposed to the elements, does not stand to
moisture too good.
How do you join EMT? - ANSWERSCompression, or set screws.
What does IMC and RMC stand for ? - ANSWERSIMC=Intermediate metal conduit
RMC=Rigid metal conduit
IMC/RMC - ANSWERSRMC=Thickest IMC=is in between when it comes to thickness.
Highest cost of material and cost
Does better at taking damage and can be found in parking garages, but still not underground.
They will always be be threaded connections.
What must IMC/RMC have when going underground? - ANSWERSThey must be wrapped in vinyl to prevent
corrosion.
What is a LB (Line Box) - ANSWERSPull point and a place to make a hard change in direction. Usually a 90
degree bend.
What is another name for a gutter? - ANSWERSThroft or waterway
What are junction boxes for? - ANSWERSPull points, protection for wire connections, change in direction,
reset the angle to 0 degrees; 360 degree
Conductor - ANSWERSAllows electricity to pass through easily
