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OSHA traing > OSHA focus four electrocution hazard > Flashcards

OSHA focus four electrocution hazard Flashcards

1
Q

What 4 types of hazards result in 90 % of work deaths

A

falls
caught in-or-between
struck-by
Electrocution

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2
Q

What are the leading types of electrocution hazards

A

overhead power lines

machinery and appliances

electrical equipment

energized objects

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3
Q

What voltage accounts for the most injuries at the work place and at home

A

> 600
Volts

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4
Q

what is considered low voltage

A

any system less then 600 V

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5
Q

dry, clean unbroken skin has a resistance of

A

100,000

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6
Q

wet or broken skin has a resistance of

A

1,000 ohms

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7
Q

how much higher is the current through wet skin then the current through dry skin

A

100x

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8
Q

what is the resistance of internal body fluids

A

300 ohms

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9
Q

What happens when current passes through the heart

A

ventricular fibrillation

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10
Q

what does ventricular fibrillation do

A

it causes the heart to stop pumping blood through the body

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11
Q

what is the lowest current that can cause death

A

0.05ampers or 50 milliamps

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12
Q

What current are most home breakers rated to trip

A

15 amps

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13
Q

what is the relationship between wire gauge, size and ampacity

A

the lower the gauge the larger the wire and the more current it can contain

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14
Q

are multiple cords allowed for fixed equipment

A

no

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15
Q

what are the 6 main electrical hazard categories
(they form the acronym besafe)

A

burn
electrocution
shock
arc flash
fire
explosion

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16
Q

what are the three type of electrical burns

A

electrical

arc/flash

thermal contact

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17
Q

how shock defined

A

the reflex response to the passage of electric current

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18
Q

how high can an arch flash be

A

35000

19
Q

Should GFCI be used for all power tools

A

yes

20
Q

what construction activity causes the most electrocution

A

excavation

21
Q

when should underground locate services be used

A

24 inches either way where the buried services are

22
Q

OSHA requires two programs for construction using temporary power

A

GFCI

AEG

23
Q

where can min clearance distances for working near power lines be found

A

OSHA regulations

24
Q

What ate three types of GFCI

A

receptacle

temporary or portable

circuit breaker GFCI

25
Q

what does conductor sized 14/3 mean

A

it is gauge 14 and has 3 wires

26
Q

should ladders be non-conductive

A

yes

27
Q

what does lock out tag out do

A

prevents contact with operating equipment parts

lock out- use locks to prevent unwanted electrical equipment activation

tagout- practice of using tags with locks to increase visibility and awareness that the lock is protecting someone’s life

28
Q

Authorized tagout person

A

some one who is incharge of lock out tag out

29
Q

affect person

A

some one who operates on the equipment that is locked out tagged out

30
Q

what is important to do to capacitors when locking out

A

deplete any stored energy

31
Q

what are the 5 major causes of lockout/tagout injuries

A

accidental restarting

failure to release residual energy

failure to disconnect from power source

failure to clear work area

failure to stop equipment

32
Q

are wires less then 3-wire dangerous

A

yes

33
Q

cord should always be what when they can

A

overhead and able to be seen clearly

34
Q

how often should you test GFCI’s

A

monthly

35
Q

what type of fire extinguisher should you never use

A

a type a

36
Q

how will foot ware for electrical workers be marked

A

EH

37
Q

fuses are meant as protection for

A

equipment

38
Q

what type of helmet is required for electrical work

A

class E helmets

39
Q

can employers deenergize power lines

A

yes as long as they work with the electric company

40
Q

should metal covers for electrical equipment be grouded

A

yes

41
Q

what does ARGCP represent and who runs it

A

Assured Equipment grounding conductor program

OSHA

42
Q

OSHA requires flexible cord to rated for

A

hard and extra hard usage

43
Q

why should extension cords be 3 wire type

A

so that they can be grounded

44
Q

How does OSHA define ectrocution

A

death by electricity

OSHA traing (28 decks)

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