NV Automatic Fire Sprinklers Practice Questions - Nevada C-41A Automatic Fire Sprinklers Contractor Examination Exam

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When a gravity tank is the automatic water supply for a sprinkler system, what produces the working pressure at the base of the riser?

A fire pump that must start before any sprinkler can flow Compressed air occupying the top third of the tank The fire department connection alone The elevation of the water surface above the discharge, at about 0.433 psi per foot of water column

Correct Answer:

The elevation of the water surface above the discharge, at about 0.433 psi per foot of water column

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