Eureka Safety: Heat & Arc Flash [English]

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How do you categorize a gas fire exposure? *

1 point

Long time, very high temp

Long time, medium temp

Short time, very high temp

Short time, medium temp

When do you wear Dielectric gloves? *

1 point

Inside the arc boundary

When you are at risk inside the shock zone

Always around ecectrical equipment

The Shock zone (prohibited approach boundary) is the distance where you are exposed to electricity through the body and MUST wear "Dielectric" gloves, how far is that for 1000 Volt DC / 750V AC? *

1 point

0 cm

2,5 cm

30 cm

100 cm

Arc flash gloves, do they insulate against electric shock? *

1 point

Yes

Yes but limited effect

Convective heat: what causes the highest heat exposure to skin? *

1 point

Hands in hot airflow

Hands in still air

What is usually the most exposed part of the body to electrical arc flash? *

1 point

Hands

Face

Upper body

All same

Safe Arc energy exposure is 1,2Cal/cm2, if arc exposure is 20 cal at 50cm, what is the arc safe distance (arc boundary)? *

1 point

100 cm

200 cm

400 cm

Your employees wear flame/arc resistant garments but not arc rated gloves, why? *

1 point

They are not worth it

Awareness

There has yet to be an accident

Hands always in the pockets or behind back so never exposed

What influences the severity of an arc incident? *

1 point

Voltage (U), temperature (C)

Voltage (U), cable diameter

Available electricity (I), shut down time (s), square of distance (1/d^2)

What is the ATPV value? *

1 point

Energy required to cause a 1st degree skin burn

Energy required to cause a 2nd degree skin burn

Energy to risk of death

If hands are twice as close as the body to the arc, how much higher is their exposure? *

1 point

4 times higher exposure

Double the exposure

Same exposure

Half the exposure

Wet arc flash gloves, does it affect protection? *

1 point

Yes improve protection

Yes, only half of the protection

Yes but limited effect

How do you categorize an arc flash incident? *

1 point

Long time, very high temp

Long time, medium temp

Short time, very high temp

Short time, medium temp

Safe Arc energy exposure is 1,2Cal/cm2, if arc exposure is 5 cal at 50cm, what is the arc safe distance (arc boundary)? *

1 point

50 cm

100 cm

200 cm

Heat radiation: what causes the highest heat exposure to skin? *

1 point

Holding hands close to fire

Holding hands close to ice

Gloves with thick latex coating can manage 250C contact heat (EN 407). How? *

1 point

They absorb and accumulate the initial heat

Short or long exposure time, they work well

What are 2 main components of an arc? *

1 point

Electric shock and radiation

Radiation and pressure/heat wave

Electric shock and pressure/heat wave

Pressure and heat wave

When should you wear arc gloves? *

1 point

Inside the arc boundary but outside the shock zone!

Always around electrical equipment

Around anything that can explode

What is by far the most common and dangerous place for an arc flash explosion? *

1 point

Close to 400V (480V) transformers

Close to high voltage lines (1000 V+)

240V (110V) alternating current

Contact heat: what causes the highest exposure to skin? *

1 point

Holding hot plastic

Holding hot metal

Hands in a hot sauna

What is an arc flash? *

1 point

Electric shock through the body

Petroleum gas explosion

Explosion caused by electricity

Explosion in general

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