NFPA 70E Exam Questions & Answers(Verified
and Updated) | Electrical Safety Study Guide
|100% Guarantee Pass | Graded A+ ,Revised and
Rationalized| Newest Version!!!
Arrangement of 70E
CORRECT ANSWER:
Introduction (Article 90)
Chapter 1 Safety Related Work Practices
Chapter 2 Safety Related Maintenance Requirements
Chapter 3 Safety Requirements for Special Equipment
Annexes (Article 350)
Arc Flash Hazard
CORRECT ANSWER:
A dangerous condition associated with the possible release of
energy caused by an electric arc
Arc Rating
CORRECT ANSWER:
The value attributed to materials that describes their performance to
exposure to an electrical arc discharge. The arc rating is expressed
in cal/cm^2 and is derived from the determined value of the arc
thermal performance value (ATPV) or energy of breakopen threshold
(E BT) (should a material system exhibit a breakopen resoponce
below the APTV value). Arc rating is reported as either APTV or E bt,
whichever is the lower value.
,Barricade
CORRECT ANSWER:
A physical obstruction such as tapes, cones, or A-frame-type wood
or metal structures intended to provide a warning and to limit
access.
Barrier
CORRECT ANSWER:
A physical obstruction that is intended to prevent contact with
equipment or energized electrical conductors and circuit parts or to
prevent unauthorized access to a work area.
Shock boundaries
CORRECT ANSWER:
Limited approach boundary,
Restricted approach boundary,
Prohibited approach boundary (not in 2015)
Limited approach boundary
CORRECT ANSWER:
An approach limit at a distance from an exposed energized electrical
conductor or circtuit part within which a shock hazard exists.
Restricted approach boundary
CORRECT ANSWER:
An approach limit at a distance from an exposed energized electrical
conductor or circuit part within which there is an increased
likelihood of electric shock, due to electrical arc-over combined with
inadvertent movement, for personnel working in close proximity to
the energized electrical conductor or circuit part.
Arc Flash Boundary
,CORRECT ANSWER:
When an arc flash hazard exists, an approach limit at a distance from
a prospective arc source within which a person could receive a
second degree burn if an electrical arc flash were to occur.
Electrically safe work condition
CORRECT ANSWER:
A state in which an electrical conductor or circuit part has been
disconnected from energized parts, locked/tagged in accordance
with established standards, tested to ensure the absence of voltage,
and grounded if determined necessary.
Hazard
CORRECT ANSWER:
A source of possible injury or damage to health
Incident Energy
CORRECT ANSWER:
The amount of thermal energy impressed on a surface, a certain
distance from the source, generated during an electrical arc event.
Incident energy is typically expressed in calories per square
centimeter.
Incident energy analysis
CORRECT ANSWER:
A component of an arc flash risk assessment used to predict the
incident energy of an arc flash for a specified set of conditions.
Qualified person
CORRECT ANSWER:
A person who has demonstrated skills and knowledge related to the
construction and operation of electrical equipment and installations
, and received safety training to identify and avoid the hazards
involved.
Risk
CORRECT ANSWER:
A combination of the likelihood of occurrence of injury or damage to
health and the severity of injury or damage to health that results form
a hazard.
Risk assessment
CORRECT ANSWER:
An overall process that identifies hazards, estimates the potential
severity of injury or damage to health, estimates the likelihood of
occurrence of injury or damage to health, and determines if
protective measures are required.
Working on (energized electrical conductors or circuit parts).
CORRECT ANSWER:
Intentionally coming in contact with energized electrical conductors
or circuit parts with hands, feet, or other body parts, with tools,
probes, or with test equipment, regardless of the PPE a person is
wearing. There are two categories of "working on": Diagnostic
(testing) is taking readings or measurements of electrical equipment
with approved test equipment that does not require making any
physical change to the equipment; repair is any physical alteration of
electrical equipment (such as making or tightening connections,
removing or replacing components, etc.).
Exposed (as applied to energized electrical conductors or circuit
parts)
CORRECT ANSWER:
and Updated) | Electrical Safety Study Guide
|100% Guarantee Pass | Graded A+ ,Revised and
Rationalized| Newest Version!!!
Arrangement of 70E
CORRECT ANSWER:
Introduction (Article 90)
Chapter 1 Safety Related Work Practices
Chapter 2 Safety Related Maintenance Requirements
Chapter 3 Safety Requirements for Special Equipment
Annexes (Article 350)
Arc Flash Hazard
CORRECT ANSWER:
A dangerous condition associated with the possible release of
energy caused by an electric arc
Arc Rating
CORRECT ANSWER:
The value attributed to materials that describes their performance to
exposure to an electrical arc discharge. The arc rating is expressed
in cal/cm^2 and is derived from the determined value of the arc
thermal performance value (ATPV) or energy of breakopen threshold
(E BT) (should a material system exhibit a breakopen resoponce
below the APTV value). Arc rating is reported as either APTV or E bt,
whichever is the lower value.
,Barricade
CORRECT ANSWER:
A physical obstruction such as tapes, cones, or A-frame-type wood
or metal structures intended to provide a warning and to limit
access.
Barrier
CORRECT ANSWER:
A physical obstruction that is intended to prevent contact with
equipment or energized electrical conductors and circuit parts or to
prevent unauthorized access to a work area.
Shock boundaries
CORRECT ANSWER:
Limited approach boundary,
Restricted approach boundary,
Prohibited approach boundary (not in 2015)
Limited approach boundary
CORRECT ANSWER:
An approach limit at a distance from an exposed energized electrical
conductor or circtuit part within which a shock hazard exists.
Restricted approach boundary
CORRECT ANSWER:
An approach limit at a distance from an exposed energized electrical
conductor or circuit part within which there is an increased
likelihood of electric shock, due to electrical arc-over combined with
inadvertent movement, for personnel working in close proximity to
the energized electrical conductor or circuit part.
Arc Flash Boundary
,CORRECT ANSWER:
When an arc flash hazard exists, an approach limit at a distance from
a prospective arc source within which a person could receive a
second degree burn if an electrical arc flash were to occur.
Electrically safe work condition
CORRECT ANSWER:
A state in which an electrical conductor or circuit part has been
disconnected from energized parts, locked/tagged in accordance
with established standards, tested to ensure the absence of voltage,
and grounded if determined necessary.
Hazard
CORRECT ANSWER:
A source of possible injury or damage to health
Incident Energy
CORRECT ANSWER:
The amount of thermal energy impressed on a surface, a certain
distance from the source, generated during an electrical arc event.
Incident energy is typically expressed in calories per square
centimeter.
Incident energy analysis
CORRECT ANSWER:
A component of an arc flash risk assessment used to predict the
incident energy of an arc flash for a specified set of conditions.
Qualified person
CORRECT ANSWER:
A person who has demonstrated skills and knowledge related to the
construction and operation of electrical equipment and installations
, and received safety training to identify and avoid the hazards
involved.
Risk
CORRECT ANSWER:
A combination of the likelihood of occurrence of injury or damage to
health and the severity of injury or damage to health that results form
a hazard.
Risk assessment
CORRECT ANSWER:
An overall process that identifies hazards, estimates the potential
severity of injury or damage to health, estimates the likelihood of
occurrence of injury or damage to health, and determines if
protective measures are required.
Working on (energized electrical conductors or circuit parts).
CORRECT ANSWER:
Intentionally coming in contact with energized electrical conductors
or circuit parts with hands, feet, or other body parts, with tools,
probes, or with test equipment, regardless of the PPE a person is
wearing. There are two categories of "working on": Diagnostic
(testing) is taking readings or measurements of electrical equipment
with approved test equipment that does not require making any
physical change to the equipment; repair is any physical alteration of
electrical equipment (such as making or tightening connections,
removing or replacing components, etc.).
Exposed (as applied to energized electrical conductors or circuit
parts)
CORRECT ANSWER:
