Electrical Safety T&D Exam with
Complete Solutions
A visible discharge of electricity across a gap in a circuit; can be sustained or temporary
- ANSWER-Arc
Any mechanism that helps prevent electrical hazards from injuring people or damaging
equipment - ANSWER-Protective device
This safety practice of creating an electrical path to ground by installing one or more
conductors between a de-energized circuit and ground - ANSWER-Protective grounding
An electrical switch that can detect a fault, automatically open to deenergize circuits,
and reclose itself at the preset time interval - ANSWER-Recloser
A condition or an action the places of workers health at risk - ANSWER-Safety hazard
A fault that occurs when an insulated energize lines cross one another, creating an
unwanted electrical path - ANSWER-Short circuit
Companies rules and guidelines established to help workers perform their job safely -
ANSWER-Safety practices
Electrical charges that can be created in de-energize lines due to friction - ANSWER-
Static electricity
A voltage detector that uses light to indicate the presence of voltage in a circuit -
ANSWER-Statiscope
The use of electrical devices to energize, de-energize, or isolate circuits - ANSWER-
Switching
The safety practice of attaching a tag or label to lines or equipment to let others know
the status of an electrical circuit - ANSWER-Tagging
A device that can be attached to a de-energized circuit to provide an electrical path to
ground - ANSWER-Temporary ground
The safety practice of applying a voltage detector or tester to a circuit to determine
whether the circuit is live or dead - ANSWER-Testing
, True or false. A safety hazard is an action or condition that place is a workers health at
risk - ANSWER-True
Which of the following is not a safety hazard commonly associated with electrical
systems?
A. Arcing
B. Switching
C. Electrical faults
D. The invisibility of electricity - ANSWER-B
True or false. A short circuit is a fault that occurs when un-insulated, energized wires
crossed one another - ANSWER-True
General safety procedures that apply to most jobs involve
A. Planning out the job
B. Inspecting the job site
C. Wearing required protective equipment
D. Following safety procedures
E. All of the above - ANSWER-E
True or false. Protective devices help reduce equipment damage by eliminating
electrical hazards - ANSWER-False
True or false. Fuses, circuit breakers, and reclosers are operated manually when
electrical hazards are detected - ANSWER-False
Which of the following is not a characteristic common to fuses, circuit breakers, and
reclosers?
A. They can respond to high current conditions
B. They can de-energize circuits
C. They can be installed throughout an electrical system
D. They can automatically close circuits at time intervals - ANSWER-D
Circuit breaker contacts_______ when a fault is detected - ANSWER-Open
True or false. Switching is performed by using system protective devices to energize,
deenergize, or isolate circuits - ANSWER-True
True or false. Isolating a circuit is the same as deenergizing a circuit - ANSWER-False
Which of the following is not a characteristic common to circuit breakers?
A. They can be operated under load
B. The switch contacts are enclosed in protective housing
C. They have some means of extinguishing arcs
D. They are operating only after circuit is deenergized - ANSWER-D
Complete Solutions
A visible discharge of electricity across a gap in a circuit; can be sustained or temporary
- ANSWER-Arc
Any mechanism that helps prevent electrical hazards from injuring people or damaging
equipment - ANSWER-Protective device
This safety practice of creating an electrical path to ground by installing one or more
conductors between a de-energized circuit and ground - ANSWER-Protective grounding
An electrical switch that can detect a fault, automatically open to deenergize circuits,
and reclose itself at the preset time interval - ANSWER-Recloser
A condition or an action the places of workers health at risk - ANSWER-Safety hazard
A fault that occurs when an insulated energize lines cross one another, creating an
unwanted electrical path - ANSWER-Short circuit
Companies rules and guidelines established to help workers perform their job safely -
ANSWER-Safety practices
Electrical charges that can be created in de-energize lines due to friction - ANSWER-
Static electricity
A voltage detector that uses light to indicate the presence of voltage in a circuit -
ANSWER-Statiscope
The use of electrical devices to energize, de-energize, or isolate circuits - ANSWER-
Switching
The safety practice of attaching a tag or label to lines or equipment to let others know
the status of an electrical circuit - ANSWER-Tagging
A device that can be attached to a de-energized circuit to provide an electrical path to
ground - ANSWER-Temporary ground
The safety practice of applying a voltage detector or tester to a circuit to determine
whether the circuit is live or dead - ANSWER-Testing
, True or false. A safety hazard is an action or condition that place is a workers health at
risk - ANSWER-True
Which of the following is not a safety hazard commonly associated with electrical
systems?
A. Arcing
B. Switching
C. Electrical faults
D. The invisibility of electricity - ANSWER-B
True or false. A short circuit is a fault that occurs when un-insulated, energized wires
crossed one another - ANSWER-True
General safety procedures that apply to most jobs involve
A. Planning out the job
B. Inspecting the job site
C. Wearing required protective equipment
D. Following safety procedures
E. All of the above - ANSWER-E
True or false. Protective devices help reduce equipment damage by eliminating
electrical hazards - ANSWER-False
True or false. Fuses, circuit breakers, and reclosers are operated manually when
electrical hazards are detected - ANSWER-False
Which of the following is not a characteristic common to fuses, circuit breakers, and
reclosers?
A. They can respond to high current conditions
B. They can de-energize circuits
C. They can be installed throughout an electrical system
D. They can automatically close circuits at time intervals - ANSWER-D
Circuit breaker contacts_______ when a fault is detected - ANSWER-Open
True or false. Switching is performed by using system protective devices to energize,
deenergize, or isolate circuits - ANSWER-True
True or false. Isolating a circuit is the same as deenergizing a circuit - ANSWER-False
Which of the following is not a characteristic common to circuit breakers?
A. They can be operated under load
B. The switch contacts are enclosed in protective housing
C. They have some means of extinguishing arcs
D. They are operating only after circuit is deenergized - ANSWER-D
