In Washington, the standalone Backflow exam (for the Backflow Assembly Tester / PL30 endorsement) is administered as what type of exam?
Not quite. The answer is A: 55 items, 90 minutes, closed book
The PL30 Backflow endorsement has its own dedicated 55-item, 90-minute, closed-book exam — smaller and shorter than the base journeyman knowledge portion, but tested independently rather than as part of it.
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