Yes because the cross-sectional area ¼ the friction loss – of the vents equals the cross-sectional 2x the velocity of the air area of the building drain. 4x the velocity of the air none of the answers provided Quiz 4 Vent from fixtures located upstream Ideal horizontal velocity of waste water from pumps that obstruct the free flow of in a horizontal drain at a 2% slope shall air and outside atmosphere shall not be be ______. used for meeting the cross-sectional 2 feet– 3 feet per second area venting requirements. 3 feet 5 feet per second – True 6 feet 9 feet per second – False none of the answers provided The maximum horizontal length When connecting a horizontal drain line permitted for a 1 ½ inch diameter vent is to a vertical drain line, which fitting is ______ feet. preferred? 15 Wye combo 20 Sanitary tee 40 Neither the Wye nor the sanitary tee 60 Vent pipes shall use ______ fittings. 70.6 inverted converted The maximum horizontal length re-vented permitted for a 2-inch diameter vent is diverted ______ feet. 15 Vent shall ______ the drainage pipe 20 they serve. 40 be graded so as to drip back by gravity 60 to 70.6 pool and hold condensate for be below the center line of The maximum horizontal length be the center line of permitted for a 3-inch diameter vent is none of the answers provided ______ feet. 15 A vent connected to a horizontal 20 drainage pipe have its invert 40 ______. 60 the center line of the drainage pipe 70.6 below the center line of the drainage pipe A 2-inch vent is to be installed which has parallel to the center line of the drainage a horizontal run of 45 feet. It ______ pipe above and perpendicular to the center (Choose the best answer) can be installed without any problem. line of the drainage pipe can be installed if decreased to 1 ½ inch diameter vent. A vent must be at least ______ above cannot be installed it is oversized. the flood rim before offsetting cannot be installed since the horizontal horizontally. run is over 30 feet. 1 inch can be installed but vent must be 6 inches increased at least 1 diameter size. 16 inches 18 inches Generally speaking, increasing the size 24 inches of the vent pipe 1 diameter size results in ______. ½ the friction loss
Yes – because the cross-sectional area of the vents equals the cross-sectional area of the building drain. Quiz 4 Vent from fixtures located upstream from pumps that obstruct the free flow of air and outside atmosphere shall not be used for meeting the cross-sectional area venting requirements. True False The maximum horizontal length permitted for a 1 ½ inch diameter vent is ______ feet. 15 20 40 60 70.6 The maximum horizontal length permitted for a 2-inch diameter vent is ______ feet. 15 20 40 60 70.6 The maximum horizontal length permitted for a 3-inch diameter vent is ______ feet. 15 20 40 60 70.6 A 2-inch vent is to be installed which has a horizontal run of 45 feet. It ______ (Choose the best answer) can be installed without any problem. can be installed if decreased to 1 ½ inch diameter vent. cannot be installed it is oversized. cannot be installed since the horizontal run is over 30 feet. can be installed but vent must be increased at least 1 diameter size. Generally speaking, increasing the size of the vent pipe 1 diameter size results in ______. ½ the friction loss ¼ the friction loss 2x the velocity of the air 4x the velocity of the air none of the answers provided Ideal horizontal velocity of waste water in a horizontal drain at a 2% slope shall be ______. 2 feet– 3 feet per second 3 feet – 5 feet per second 6 feet – 9 feet per second none of the answers provided When connecting a horizontal drain line to a vertical drain line, which fitting is preferred? Wye combo Sanitary tee Neither the Wye nor the sanitary tee Vent pipes shall use ______ fittings. inverted converted re-vented diverted Vent shall ______ the drainage pipe they serve. be graded so as to drip back by gravity to pool and hold condensate for be below the center line of be the center line of none of the answers provided A vent connected to a horizontal drainage pipe have its invert ______. the center line of the drainage pipe below the center line of the drainage pipe parallel to the center line of the drainage pipe above and perpendicular to the center line of the drainage pipe A vent must be at least ______ above the flood rim before offsetting horizontally. 1 inch 6 inches 16 inches 18 inches 24 inches