Rhode Island Journeyman Plumber Practice Exam

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Study for the Rhode Island Journeyman Plumber Exam. Prepare with flashcards and multiple choice questions, each with hints and explanations. Achieve success in your plumbing career!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the standard size for a laundry stand pipe?

1 inch
1-1/4 inches
1-1/2 inches
2 inches

The correct answer is: 1-1/4 inches

The standard size for a laundry standpipe is 1-1/4 inches. This size is essential because it allows for adequate drainage of the washing machine while preventing potential clogs. A standpipe that is too small may not handle the discharge of water efficiently, leading to backups and overflows. The 1-1/4 inch size strikes a balance between being large enough to allow for proper drainage and compact enough to fit standard plumbing configurations in residential laundry setups. Choosing this size ensures compliance with plumbing codes, which often specify minimum diameters for drainage systems to ensure they function effectively without issues. This size has been widely adopted due to its practicality in managing the flow rates typically associated with washing machines, aligning well with the necessary plumbing standards.