what is a spark ?

 what is a spark ?

1) spark is an almost instantaneous discharge between two conductors where almost all of the energy in the electrostatic field is converted into heat that is available to ignite a flammable atmosphere
2) occasional sparks from the main engine exhaust can cause a fire in the drydocks 
3) sparks can occur during cargo movement and sloshing in an inerted tank

Ans____1) spark is an almost instantaneous discharge between two conductors where almost all of the energy in the electrostatic field is converted into heat that is available to ignite a flammable atmosphere
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