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How do dry pipe systems work?

How do dry pipe systems work?

PrepAway - Latest Free Exam Questions & Answers

A.
The sprinkler heads are open; water releases when the deluge valve is opened by a fire alarm

B.
They release water into the pipes when a fire alarm triggers. The water releases once the sprinkler head opens.

C.
The pipes contain water which is released when the sprinkler head opens

D.
The water is held back by a valve which remains closed as long as sufficient air pressure remains in the pipes. The valve opens once the sprinkler head opens and air pressure drops in the pipes.

Explanation:
Answer D is correct; dry pipes contain compressed air and require 1 trigger to deploy: the sprinkler head opens. The valve opens once air pressure drops in the pipes, releasing water.

Incorrect Answers and Explanations: A, B, and C: Answers A, B, and C are incorrect; A describes deluge systems. B describes preaction systems. C describes wet pipe systems.

One Comment on “How do dry pipe systems work?

  1. joe says:

    dry pipes contain compressed air and require 1 trigger to deploy: the sprinkler head opens. The valve opens once air pressure drops in the pipes, releasing water.




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