EMC Chapter 4 Flashcards
___ is not an effect of electrical shock
Dehydration
The ___ approach boundary is the distance from an exposed energized conductor or circuit part where an increased risk of electric shock exists due to the close proximity of the person to the energized conductor or circuit part.
restricted
___ causes electrons from one source to flow to another material, causing an electron buildup (negative static charge)
Friction
A(n)___ signal word is a word used to indicate a potentially hazardous situation which, if not avoided, could result in death or serious injury.
warning
A(n)___ signal word is used to indicate an imminently hazardous situation which, if not avoided, will result in death or serious injury.
danger
Electrical power must be ___ when electrical equipment is inspected, serviced, or repaired.
removed
___ is the process of removing the source of electrical power and installing a lock which prevents the power from being turned on.
Lockout
___ is the process of placing a danger tag on the source of electrical power, which indicates that the equipment may not be operated until the danger tag is removed.
Tagout
A ___ tag has the same importance as a lock and is used alone only when a lock does not fit the disconnect device.
danger
A(n)___ should b used when more than one technician is required to perform a task on a piece of equipment.
hasp
An ___ is an extremely high-temperature discharge produced by an electrical fault in the air.
arc flash
The ___ boundary is the distance from exposed energized conductors or circuit parts where bare skin would receive the onset of a second-degree burn.
arc flash
Class ___ protective helmets protect against impact and voltage up to 20k V.
E
___ are not considered eye protection.
Prescription glasses
___ protectors are worn over rubber insulating gloves to prevent penetration of the rubber insulating gloves
Leather
___ injuries are the result of improper lifting.
Back
___ insulating matting is a floor covering that provides technicians protection from electrical shock when working on live circuits.
Rubber
When removing fuses, use an approved fuse puller and break contact on the ___ side of the circuit first.
Line
Grounding is the connection of all exposed non-current carrying metal parts to ___.
Earth
A ___ is a device that protects against electrical shock by detecting an imbalance of current in the normal conductor pathways and opening the circuit.
Ground fault circuit interrupter
Oily waste cans seal out ___ to prevent spontaneous combustion.
oxygen
Class ___ fires include burning electrical devices, motors, and transformers
C
___ is not required to start a fire.
Carbon Dioxide
Fire extinguishers are normally painted red, but can also be painted ___.
yellow
Fire extinguisher should be inspected at least once a ___.
month
A(n)___ space is a space large enough and so configured that an employee can physically enter and perform assigned work, that has limited or restricted means for entry and exit, and is not designed for continuous employee occupancy.
confined
Air normally contains ___% oxygen.
21
All canceled entry permits must be filed for at least ___ year(s)
one
Overhead power line conductors ___ V or higher are usually bare (uninsulated), while low-voltage systems such as service drops to buildings consists of insulated conductors.
600
Per NFPA 70 E, if the line voltage exceeds 50 kV, the minimum overhead line clearance for all nonqualified individuals is ___ ‘plus 4” for every 10 kV over 50kV
10
A(n)___ is a temporary or movable platform and structure for workers to stand on when working at a height above the floor.
scaffold
