Question 25Safety & Environmental - Assistant Engineer
70% to passIf flammable vapors have penetrated a gas free space, which of the following actions would be the most hazardous to perform?
AOpening switches in the space to de-energize circuits.
BClosing switches adjacent to the space to operate vent fans.
CLeaving electrical circuits energized in the space.
DSecuring all power to the space from a remote location.
AI Explanation
The correct answer is A) Opening switches in the space to de-energize circuits. Opening switches in a space with flammable vapors is the most hazardous action because it can create sparks that could ignite the vapors. Electrical switches are designed to make and break electrical circuits, which can produce arcing and ignition sources. Leaving the circuits energized or securing power remotely are safer options, as they do not introduce potential ignition sources into the flammable atmosphere. Closing switches to operate vent fans may be the safest option, as it can help remove the flammable vapors from the space.
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