In the illustrated huddling-chamber safety valve, what statement is true concerning the opening and closing forces acting upon the disc? Illustration SG-0018

Question

Accepted Answer

The spring force acting downward on the disc is a valve closing force, and the sensed pressure acting upward on the disc is a valve opening force.

Answer

The spring force acting upward on the disc is a valve opening force, and the sensed pressure acting downward on the disc is a valve closing force.

Answer

The spring force acting upward on the disc is a valve closing force, and the sensed pressure acting downward on the disc is a valve opening force.

Answer

The spring force acting downward on the disc is a valve opening force, and the sensed pressure acting upward on the disc is a valve closing force.

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