MASSACHUSETTS PLUMBING CODE EXAM
QUESTIONS AND ANSWERS LATEST 2025-2026
UPDATE |EXCELLENCY ALL THE WAY
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
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 main 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
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
QUESTIONS AND ANSWERS LATEST 2025-2026
UPDATE |EXCELLENCY ALL THE WAY
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
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 main 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
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
