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Power Pro > Volume 1: Safety and Technical Publications > Flashcards

Volume 1: Safety and Technical Publications Flashcards

1
Q

What is the most common voltage used in the U.S.

A

120 VAC at 60 Hz

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2
Q

At what amount can amperage be lethal?

A

0.1 A or 100 mA

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3
Q

At what level of voltage does Power Pro work with?

A

120 - 4160 VAC

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4
Q

What happens when you make contact with .007 - 5 mA?

A

Start to feel the energy, tingling

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5
Q

What happens when you make contact with 5 - 15 mA?

A

Experience pain, muscle contraction

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6
Q

What happens when you make contact with 15 - 50 mA?

A

Grip paralysis threshold

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7
Q

What happens when you make contact with 50 - 100 mA?

A

Respiratory system shuts down

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8
Q

What happens when you make contact with 100 - 300 mA?

A

Heart fibrillation

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9
Q

What happens when you make contact with 300 - 700 mA?

A

Heart clamps tight

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10
Q

What happens when you make contact with 700 - 2,000 mA?

A

Tissue and internal organs burn

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11
Q

What is the safest way to do business with electrical circuits?

A

De-energize the circuit

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12
Q

What are the exceptions to normally de-energizing an electrical circuit before performing work?

A

Necessary to support critical missions, prevent injury, protect property.

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13
Q

How many people are required to work on a live circuit?

A

2 people minimum

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14
Q

How should you treat a circuit before you verify that it’s de-energized?

A

As if it were live.

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15
Q

Who is the only person who can authorize work on an energized circuit?

A

The Base Civil Engineer (CES Commander)

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16
Q

What Air Force publication outlines safety precautions to be utilized while working with electrical circuits?

A

AFI 91-203

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17
Q

What is AFI 91-203?

A

Air Force consolidated safety standard

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18
Q

What is AFI 32-1064?

A

Air Force Electrical Safe Practices

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19
Q

What does UFC 3-560-1, Electrical Safety, O&M cover?

A

Operations and maintenance of electrical systems and applies to all branches of DOD.

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20
Q

What is NFPA 70E?

A

Commercial standard for electrical safety in the workplace

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21
Q

What is Arc Flash?

A

The result of the passage of an electric current through the air

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22
Q

When does arc flash occur?

A

When the air fails to act as an insulator but serves as a conductor.

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23
Q

What is Arc Blast?

A

When the metal of the arc site expands and vaporizes.

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24
Q

How far can an arc blast be lethal?

A

To 10 feet or more.

25
Q

When must Arc Flash warning labels be placed in equipment?

A

When the equipment requires maintenance while energized.

26
Q

What are some examples of equipment that require an Arc Flash warning label?

A

Pad-mounted transformers, switch gears, switchboards, panel boards, disconnect switches, industrial control panels, meter socket enclosures, and motor control centers.

27
Q

What is an Arc Flash Boundary?

A

The distance from an arc source at which the heat energy on the surface of the skin is 1.2 cal/cm2 or 5 J/cm2

28
Q

What is the minimum protection boundary for Arc Flash boundary?

A

10 ft up to 750 V and 20 ft for over 750 V.

29
Q

Who is allowed within the Arc Flash boundary?

A

Only qualified workers wearing PPE.

30
Q

Who is allowed within the Limited Approach Boundary?

A

Only by qualified personnel. Any unqualified personnel must be escorted by qualified personnel.

31
Q

Who can cross the Restricted Approach Boundary?

A

Only by qualified personnel at a distance from the live part.

32
Q

What does the Restricted Approach Boundary require personnel to do?

A

The use of shock protection techniques and equipment when crossed due to its proximity to the shock hazard.

33
Q

Who can cross the Prohibited Approach Boundary?

A

Only by qualified personnel, at a distance from the live part, and requires the same protection as if making direct contact with the live part.

34
Q

What kind of clothing items are unsafe to be worn while near energized circuits over 50 V?

A

Anything made from synthetics or blended with synthetics

35
Q

What is the definition of electric shock?

A

The passing of electricity through the body resulting in varying degrees of injury

36
Q

What kind of injuries are possible as a result of electric shock?

A

Burns, bleeding, physical shock

37
Q

What is the definition of electrocution?

A

The passing of electricity through the body resulting in death

38
Q

What are the two main courses of action for removing a victim from an energized circuit?

A

Use your brain (avoid becoming apart of the circuit yourself) and disconnect the power source.

39
Q

What is the next course of action if you are unable to disconnect the power source of the energized circuit that someone is caught in?

A

Remove the victim from the energized circuit

40
Q

What should you use to remove a victim from an energized circuit?

A

An insulated object (i.e., dry lumber, dry rope, plastic pipe)

41
Q

Where can electric burns occur?

A

Wherever a person may come into contact with electricity

42
Q

What does the severity of electrical burns depend on?

A

Length of contact with current, strength of current, type of current (AC or DC) direction/path of current through the body.

43
Q

What are the steps to treating burns?

A

Cool the burn with water, apply antibiotic ointment, covet the burn with a dressing

44
Q

Can ice be applied to a burn? Why or why not?

A

No. It may cause more damage to the tissue

45
Q

What does a third degree burn look like?

A

The skin is charred and black

46
Q

How should you treat a third degree burn?

A

Apply a dry dressing and seek medical help immediately

47
Q

When does bleeding occur?

A

When a blood vessel is torn

48
Q

How could an electric shock cause bleeding?

A

From the shock itself or by coming in contact with an object because of the shock

49
Q

What are the steps to control bleeding?

A

Have the victim lie down, remove clothing to expose the wound, apply a clean dressing and direct pressure, elevate the limb.

50
Q

What should you do if applying pressure to a wound doesn’t stop the bleeding?

A

Apply pressure to pressure points. Apply a tourniquet if all else fails.

51
Q

What should you do if clothing is charred and stuck to the wound?

A

Do not remove it

52
Q

Why shouldn’t you remove a dressing from a wound if it becomes saturated?

A

It may pull scabbing off from the wound

53
Q

Where are pressure points located to help stop bleeding?

A

The inside of the upper arm and the inside of the thigh

54
Q

What is shock?

A

The body’s natural attempt to keep oxygen rich blood flowing to the vital organs when seriously injured or ill.

55
Q

What happens when someone is going into shock?

A

The body pulls blood away from the extremities to keep blood flowing to the vital organs. This deprives the extremities of blood, causing them to start dying. Blood is sent back to the limbs, depriving the vitals organs of oxygen.

56
Q

What are the symptoms of shock?

A

Drowsiness, restlessness, unconsciousness, irregular heartbeat, and death.

57
Q

What are the steps to treat shock?

A

Have the victim lie down, control any bleeding, maintain their body temperature, reassure them, elevate the legs 12 inches, do not give them anything to eat or drink, place them on their side if they pass out.

58
Q

When do you not elevate a shock victims legs?

A

When a spinal injury is suspected

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