Massachusetts Plumbing Code Exam Questions and Answers 2024

Massachusetts Plumbing Code Exam Questions and Answers 2024 How far can a trap arm go 1 1/2" 2" 3" 4" - answer5' 6' 8' 10' What is the maximum water pressure going into a residential dwelling - answer80 psi What is the smallest drain piping allowed underground - answer2" What's the minimal size vent going through a roof - answer2" How many pounds in a gallon of water - answer8.33 lbs How many gallons in a cubic foot of water - answer7.5 How much does a square foot of water weigh - answer62.5 lbs What is the minimal size piping for drainage going through a foundation wall - answer4" What is the minimal size water main underground - answer3/4" How far should a dwv vent go through the roof - answer18-24" What is the max temp for a shower head - answer112 degrees What is the maximum distance for a common vent at different levels - answer10" What is the minimal liquid trap seal - answer2" What must be stamped on the lip of every S.U. Gasket - answerASTM, SV or XH neoprene, manufactures name How do you calculate the size of an air gap - answerIt must be at least twice the size of the diameter of the drain it serves (into a receptor, sink, floor drain, or inlet side of a trap) What is the minimal pounds of grease per gallon of flow - answer2 pounds Minimal size water heater that requires a safe pan - answer6 gallons what is the multiplier for a 45 degree offset - answerRise x 1.414 = offset Area of a triangle formula - answerA=1/2bh (bxh divide by 2) What temperature does water boil at - answer212 degrees Fahrenheit What temperature does water freeze at - answer32 degrees Fahrenheit Volume of a rectangle - answerL x W x H Volume of a triangular solid - answerBxh divided by 2 x L How many gallons in a fixture unit - answer7.5 How many cubic Inches in a gallon - answer231" Psi (gauge pressure) at the base of a column of water - answer.434 x height in feet At what temp is water most dense - answer39.2 degrees Volume of a cylinder - answerV=πr²h ( pi X r squared X height Where is the vacuum breaker located on a flushometer - answerAfter the valve How do you test a water systems - answer125 psi for 15 minutes How many water closets are allowed on a 3" stack - answer3 Pitch for 4" drainage or more per foot - answer1/8th per foot What size letters are on a triangular tag when supplying non potable water - answer7/16 inch If only one stack through the roof what must it be - answer3" What is a fixture unit - answerAmount of water that can drain through 1 1/4" drain in 60 seconds Maximum distance for fixture outlet to trap wier - answer24" Expansion rate of schedule 40 pvc pipe per 100 degrees - answer3/8 inches per 10 feet Max length of a hot water line before return line required - answer100 feet What color designates hydrants with nonpotable water? - answerYellow What is the multiplier for 22 1/2 degree angle - answer2.613 What is the max length for a residential flexible gas connector - answer4 feet