ETO ETO Exam papers 📅 Apr 2021

Exam Question

With respect to the hazardous areas of tankers:

(a) Explain the term flameproof (Exd) for electrical equipment. (6)

(b) State the type of electrical equipment that would be protected in this way. (4)

Reference Answer

Flame proof: the equipment is simply contained in a heavy protective enclosure, usually made of die cast steel or occasionally plastic. If heat or sparks from faulty equipments within the enclosure ignite flammable gas present with it, the resulting explosion is contained within the enclosure.
The enclosure must fulfil three conditions
Enclosure must be strong enough to withstand the internal explosion without suffering damage
Enclosure must prevent the flame and hot gases being transmitted, to the external flammable atmosphere

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