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" - answer✔✔5' 6' 8' 10' What is the maximum water pressure going into a residential dwelling - answer✔✔80 psi What is the smallest drain piping allowed underground - answer✔✔2" What's the minimal size vent going through a roof - answer✔✔2" How many pounds in a gallon of water - answer✔✔8.33 lbs How many gallons in a cubic foot of water - answer✔✔7.5 How much does a square foot of water weigh - answer✔✔62.5 lbs What is the minimal size piping for drainage going through a foundation wall - answer✔✔4" What is the minimal size water m ain underground - answer✔✔3/4" How far should a dwv vent go through the roof - answer✔✔18-24" What is the max temp for a shower head - answer✔✔112 degrees What is the maximum distance for a common vent at different levels - answer✔✔10" What is the minimal liquid trap seal - answer✔✔2" What must be stamped on the lip of every S.U. Gasket - answer✔✔ASTM, SV or XH neoprene, manufactures name How do you calculate the size of an air gap - answer✔✔It 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 - answer✔✔2 pounds Minimal size water heater that requires a safe pan - answer✔✔6 gallons what is the multiplier for a 45 degree offset - answer✔✔Rise x 1.414 = offset Area of a triangle formula - answer✔✔A=1/2bh (bxh divide by 2) What temperature does water boil at - answer✔✔212 degrees Fahrenheit What temperature does water freeze at - answer✔✔32 degrees Fahrenheit Volume of a rectangle - answer✔✔L x W x H Volume of a triangular solid - answer✔✔Bxh divided by 2 x L How many gallons in a fixture unit - answer✔✔7.5 How many cubic Inches in a gallon - answer✔✔231" Psi (gauge pressure) at the base of a column of water - answer✔✔.434 x height in feet At what temp is water most dense - answer✔✔39.2 degrees Volume of a cylinder - answer✔✔V=πr²h ( pi X r squared X height Where is the vacuum breaker located on a flushometer - answer✔✔After the valve How do you test a water sys tems - answer✔✔125 psi for 15 minutes How many water closets are allowed on a 3" stack - answer✔✔3 Pitch for 4" drainage or more per foot - answer✔✔1/8th per foot What size letters are on a triangular tag when supplying non potable water - answer✔✔7/16 inch If only one stack through the roof what must it be - answer✔✔3" What is a fixture unit - answer✔✔Amount of water that can drain through 1 1/4" drain in 60 seconds Maximum distance for fixture outlet to trap wier - answer✔✔24" Expansion rate of schedule 4 0 pvc pipe per 100 degrees - answer✔✔3/8 inches per 10 feet Max length of a hot water line before return line required - answer✔✔100 feet What color designates hydrants with nonpotable water? - answer✔✔Yellow What is the multiplier for 22 1/2 degree angle - answer✔✔2.613 What is the max length for a residential flexible gas connector - answer✔✔4 feet