F - Electrical Wiring, Lighting Circuits and Circuit Protection Flashcards
Which of the following is Not a method of protecting a conductor from corrosion: heat shrinking tubing, liquid tape, flux, or electrical tape?
Flux
There is a discussion between two technicians about wiring harness and terminal repairs. Technician A thinks that rosin paste and rosin core solder would work best for electrical repairs. Technician B thinks that when a conductor needs to be replaced, it should never be replaced with a smaller gauge wire. Who is right?
Both Tech A and Tech B
All wiring harness connectors have:
Locking mechanisms, mating guides, and removable pins and sockets.
The purpose of a (?) is to pass electrical from one set of wires to another.
Conductor connector.
(?) must carry the large current flows required to start a high compression diesel engine.
Cranking circuits.
(?) on heavy equipment is used to transfer visual, audio, or digital information.
Communication wiring.
To open a wiring harness that is taped, a (?) can be used without damaging the conductor.
Seam ripper.
Always install hold-down brackets, clamps and wire ties to prevent wiring harness vibration or movement that could cause:
Chafing.
If conductor wires are not damaged, but the conductor insulation is damaged, it can be repaired using:
Heat shrink tubing.
An approved method of repairing copper conductors is:
Crimp splicing.
All electrical schematics are drawn in a (?) condition.
De-energized.
The components of an electrical switch that conducts the electrical current are called:
Contacts.
In a trailer clearance light circuit, the non-cycling circuit breaker keeps overheating and has to be manually reset. Tech A says that installing a cycling circuit breaker with higher amperage than specification will correct the problem. Tech B says installing a higher amperage cycling circuit breaker may cause damage to the wiring harness and components. Who is right.
Your girlfriend. Your girlfriend is always right.
Technician B
A new set of conductors must be connected to screw-secured trailer plug terminals. Tech A says that the conductor wire ends must be tinned with solder before they are inserted. Tech B says that before the plug is put into service, the conductor wires and screw-secured-connectors should be covered with dielectric grease to prevent corrosion. Who is right?
Both Tech A and Tech B
When a fuse in an electrical lighting circuit overheats and burns out quickly, the probable cause is:
Too much twerking.
A ground fault.
When two or more electrical lighting circuits operate abnormally at the same time, the probable cause is:
Aliens.
A short.
When one lamp in an electrical lighting circuit burns dimly when compared to the other lamps in the same circuit the probable cause is:
An unwanted high resistance.
When current stops flowing in part of an electrical lighting circuit, the probable cause is:
An open circuit.
When testing a relay a cross the coil you receive a reading of OL what is that most likely cause of failure?
An open circuit.
What are the four factors a technician must consider when repairing broken conductors or replacing damaged conductors?
Mechanical Strength - Connection must be physically strong.
Electrical Integrity - Conductor repair must allow required current flow.
Insulation - The repair must insulate the conductor to prevent corrosion or short circuits.
Security - The repair must be secure to prevent chaffing and vibration damage.
