MATHEMATICS FOR PLUMBERS AND PIPEFITTERS - 2025

The vertex of and angle is the _______________ of a circle. - ANS center The _____________ is a 90 drainage fitting which has an inside construction designed to cause as little turbulence as possible. - ANS tee wye When fitting pipe, a 1/8 bend is _____________ degrees. - ANS 45 degrees. Volumes are often computed in cubic inches tor small quantities. The U.S. Bureau of Standards has set _______________ cubic inches as a U.S. Gallon. - ANS 231 cubic inches According to MATH FOR PLUMBERS AND PIPEFITTERS in plumbing practice, water pressure is measured by a gauge or by the height, or ____________. - ANS head According to MATH FOR PLUMBERS AND PIPIFITTERS which of the following is not a method for cast iron pipe connections. - ANS soldered joint. A ___________ is waste and vent piping to connect a fixture at some distance from the stack - ANS loop According to MATH FOR PLUMBERS AND PIPEFITTERS parallel offsets always have ____________ and are used because of a neat appearance that saves space. - ANS parallel angles 1/2 of the offset angle. A pipe with a flange on each end is called a ____________ . - ANS Spool piece. A _________________ is one that goes around a stack, tank, or other cylindrical object. The diagonals are usually at 45˚. - ANS jumper offset A Bench Mark is a station of known elevation often established by others. _____________ establishes bench marks with elevations above sea level. - ANS The U.S. Coast & Geodetic Survey A cast iron pipe has a fitting which makes an angle of 60˚ with the horizontal. The fitting is a ______________ bend. - ANS 1/6 bend Using the reference MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, determine the horizontal offset distance for a pipe installed at an angle of 22-1/2˚ with the horizontal and having a run of 5 feet. Select the closest answer. - ANS 24 7/8 The capacity of a nominal 4" diameter water service main flowing at 8' per second is _____________ . Assume standard weight pipe. - ANS between 300.1 and 325.0 gpm According to MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, how many 2" pipes will an 8" pipe supply? Do NOT allow for friction. - ANS 16 According to MATHEMATICS FOR PLUMBER AND PIPEFITTERS, a ___________ inch bit is required for drilling a hole (in wood) for the installation of a nominal 4" standard weight pipe. - ANS 4 11/16" According to MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, the height of a roof with a span of 80' and 1/4 pitch is _________ feet. - ANS 20 feet. A 6" standard weight steel threaded pipe has ___________ threads per inch. - ANS 8 Using the reference MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, determine the number of - ANS According t o MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, a __________ inch pipe will serve a toilet room which has thirty-two 1/2" branch lines. - ANS 1 1/4 According to MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, a 6" standard weight steel pipe installed with a run of 12'-6" and an offset of 12'-6" makes an angle of ___________ degrees in a vertical run. - ANS 45˚ According to MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, a septic tank holding 8,078 gallons is 12' wide by 18' long. The depth of the tank is ____________ feet. Select the closest answer. - ANS 5 A nominal 5" hard drawn copper tube has an inside diameter of 4.805 inches. The tube is type ___________ . - ANS K The number of bolts required for a 4" cast iron screwed flange is __________ . - ANS 8 Compute the wall thickness for a type DWV copper tube 2" nominal size. - ANS between 1/32 and 3/64. According to MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, a fitting that turns an angle of 22 1/2˚ is called a ______________ bend. - ANS 1/16 A horizontal cylindrical storage tank 13' in diameter and 25' long is filled to a height of 4'. According to MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, the volume of water in the tank is ____________ gallons. - ANS between 6,000 and 8,000 gallons Using the reference MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, estimate the quantity of lead required to pour 6 joints of 2" pipe. Select the closest answer. - ANS 9 punds A 4" schedule 40 PVC water pipe is limited to _________ psi pressure. - ANS 160 psi pressure. A water supply serves a building with 3 flush valve water closets, 2 flush valve urinals, and 4 lavatories. Using the reference MATHEMATICS FOR PLUMBERS AND PIPEFITTERS, estimate the size water service required. - ANS 1 1/2