Question 940 Deck General

70% to pass

What is a single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe?

A pivot coupling
B spectacle flange
C blind flange
D quick-release coupling
AI Explanation

The correct answer is B) spectacle flange. A spectacle flange is a single fitting installed in a pipeline that can either block the flow (by having a solid disk in the center) or allow full flow passage (by having an open center). This makes it a versatile fitting that can be used to either completely isolate a section of pipe or allow unobstructed flow, depending on the orientation of the flange. The other options are incorrect because they do not provide the same functionality. A pivot coupling is used to connect two pipes, a blind flange is used to permanently seal off the end of a pipe, and a quick-release coupling is used to allow quick connection and disconnection of pipes, but none of them can perform the function of a spectacle flange.

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