Rhode Island Journeyman Plumber Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

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!

Practice this question and more.

How many gallons of water are contained in one cubic foot?

7.48 gallons
10 gallons
12 gallons
15 gallons

The correct answer is: 7.48 gallons

One cubic foot contains 7.48 gallons of water. This conversion is based on the known relationship between volume measurements in the U.S. customary system. To understand this, it's helpful to recognize that a cubic foot is a three-dimensional measurement indicating the volume occupied by a cube with each side measuring one foot. Since 1 foot is equivalent to 12 inches, when you calculate the volume in cubic inches (12 inches x 12 inches x 12 inches), you find there are 1,728 cubic inches in one cubic foot. The conversion factor is that there are 231 cubic inches in a gallon. Dividing the total cubic inches in a cubic foot (1,728) by the cubic inches in a gallon (231) yields approximately 7.48 gallons. This is an important fact for plumbing and various engineering calculations, as understanding the relationship between volume and liquid measurements is vital in the design and installation of water systems.