Shock, Arc, and Blast Flashcards
An electrical shock occurs when the ? becomes a part of the electric circuit.
Body
It is important to understand three things about electricity in order to work with it safely: how parts of the human body react to it, how it can be directed, and how it ? .
Acts
One of the factors that determine the resistance of a material is the ? of the substance.
Temperature
The hand-to-hand resistance of a Qualified Electrical Worker working on a circuit is 5,000 ohms. The circuit voltage is 480 volts. The amount of current that would flow in the worker’s body if he becomes part of the circuit is ? .
96
The hand-to-hand resistance of a Qualified Electrical Worker working on a circuit is 5,000 ohms. The circuit voltage is 480 volts. The amount of current that would flow in the worker’s body if he becomes part of the circuit is ? .
True
An outside electric current with as little as ? can upset the rhythmic, coordinated beating of the heart by disturbing the nerve impulses.
75
When it is dry, the outer layer of skin may have a resistance of several ? , but when it is moist, there is a radical drop in resistance.
Thousand Ohms
The skin has a “breakdown” voltage at which point it is “punctured,” leaving only the lower resistance body tissue to impede the flow of current. This voltage will vary with the individual, but is in the area of ? .
600v
Electric shock can cause loss of ? , resulting in the inability to let go of an electrical conductor
Muscular Control
A severe shock can cause considerably more damage to the body than ? .
Is Visable
The “let-go” threshold for a man receiving an electrical shock is between 9 and ? .
30 ma
The possibility of cardiac arrest, severe burns, and death can occur when an electrical shock of ? occurs.
10,000mA
The ? part of an electrical arc is caused by the pressure developed by the near-instantaneous heating of the air surrounding the arc and from the expansion of the metal as it is vaporized.
Blast
Burning becomes the major effect on the body at ?
600v
For arm and hand protection against electrical shocks, ? is considered the best material for insulating gloves and sleeves, and must conform to ANSI standards.
Rubber
