The four operating principles of automatic sprinklers demand that they be:
The four operating principles of automatic sprinklers demand that they be:
The four operating principles of automatic sprinklers are that they must be rugged, mechanically simple, reliable in operation, and free from premature operation. These characteristics ensure that the sprinklers will function effectively under various conditions and minimize the need for maintenance or failure in critical situations.
The answer is B: Rugged, mechanically simple, reliable in operation, and free from premature operation. This can be found on page 16-28.
ANS: B. FPH 16-28