Relief vents ______. provide additional air to the drainage system where the primary vent is too far from the fixture have an external pressure relief to maintain the pressure in the vents at a safe level overflow excess waste water into a secondary chamber have a 2-inch minimum diameter none of the answers provided A circuit vent ______. serves more than one fixture is installed before the last fixture extends up to the open air can connect to another vent that extends to the outside all of the answers provided Branch vents are ______. vents extending horizontally that connect multiple vents together found only on branch drain lines only on branched waste lines found on Treed Systems none of the answers provided “S” traps will siphon. True False Venting a trap ______. allows pathogens into an area makes a room smell allows waste water to flood above the rim of a fixture maintains the water seal none of the answers provided To main a water seal, the vent system needs to protect the seal from ______ of differential pressure. 1 inch 1.5 inches 2 inches 3 inches none of the answers provided Moving waste water in a horizontal drainage pipe ______. generates a positive air pressure in front of the waste water generates a negative pressure behind the waste water can slow down due to air pressure differences can drop out the debris it is carrying if it moves too slowly in the drain line all of the answers provided The target velocity of waste water in a horizontal drain line is ______. 1 to 2 feet per second 2 to 3 feet per second 3 to 5 feet per second 5 to 6 feet per second none of the answers provided Ideally, a horizontal drain pipe shouldn’t be more than ______ full. 1/4 1/3 1/2 2/3 7/8 Proper venting ______. reduces friction losses to keep the material flowing through the drainage pipe the trap seal in place which prevents the entry of sewer gases keeps the trap seal in place which prevents potential exposure to infectious diseases all of the answers provided none of the answers provided Quiz 2 A common trap is the P-trap and is named because it ______. receives “Pee” from urinals and closets is shaped like the letter P was originally manufactured by Peabody Manufacturing and was abbreviated to P
8 The minimum distance from a 1 ½ inch trap arm to the vent is ______ inches. 2 ½ 3 4 6 8 The maximum length of a 2-inch diameter trap arm is ______ inches. 30 42 60 72 120 The maximum length of a 1 ½ inch diameter trap arm is ______ inches. 30 42 60 72 120 The maximum length of a 3-inch diameter trap arm is ______ inches. 30 42 60 72 120 To avoid a possible blocked vent, use a Sanitary Tee to connect the trap arm to a vertical drain/vent. True False Answer questions 16-20 to correctly size the vent for a “clothes washer” that is 28 feet in length. The minimum trap arm size is ______. 1 ¼ inch 1 ½ inch 2 inches 3 inches The clothes washer is at ______ DFU / DFUs. 1.0 2.0 3.0 4.0 5.0 The minimum distance from the trap to the vent is ______ inches. 2 ½ 3 4 6 8 The maximum length of the trap arm is ______ inches. 30 42 60 72 120 The minimum diameter sized vent for this application is ______. 1 ¼ inch 1 ½ inch 2 inches 3 inches 4 inches Quiz 3 Vent piping shall be permitted to be omitted on an interceptor where such interceptor acts as a primary settling tank and discharges through a horizontal indirect waste pipe into a secondary interceptor. True False Traps serving sinks that are part of the equipment of soda fountains need not be vented if they can be discharged into an approved floor sink. True False DWV copper tubing has ______ or ______ colored printing on the tube sides. black – red black – white red – blue yellow – green yellow – light orange Type K copper piping is labeled in ______ lettering. Red
3 inches 5 inches 10 inches 15 inches In with frost or snow that have a minimum design temperature below 0ºF, vent terminals shall be no less than ______ in diameter, and in no event can they be smaller than the required vent pipe. 1 ¼ inches 1 ½ inches 2 inches 3 inches 4 inches Each drainage stack that extends ______ or more stories shall be served by a parallel vent stack. 1 3 5 10 15 Each vent drainage stack shall also be connected to the drainage stack at each _____ floor, counting ______ from the uppermost fixture drain. 5th – down 5th – up 3rd – down 3rd – up none of the answers provided The yoke vent connection to the vent stack shall be placed not less than ______ inches above the floor level. 24 36 42 48 60 Quiz 6 Wet venting is limited to vertical drainage piping receiving the discharge from the trap arm of ______ fixture unit fixtures that also serves as a vent… (continued on next question) one and two two and three three and four four and five (From previous question) … and not exceeding ______ fixture(s). one two three four five A wet vent ______. is a vertical drain pipe from one fixture which acts as a vent for the fixture below is installed under the flood rim carries only water but no waste material is glued together with a “wet” bonding agent that cures in water none of the answers provided When installing a wet vent, all of the fixtures must be located ______. in the same building on the same floor horizontally from one another within 15 feet of one another none of the answers provided The maximum length allowed for a wet vent is ______. 1 foot 3 feet 6 feet 9 feet 16 feet The diameter of the wet vent shall be not less than ______ pipe size(s) larger than the minimum sized waste pipe of the upper fixtures. the same 1 2 2 ½ 3 The minimum diameter size for a wet vent is ______. 1 ¼ inches 1 ½ inches 2 inches 3 inches 4 inches
Common vent sizing be the sum of the fixture units served but, in no case, smaller than the minimum vent pipe size required for a fixture served. True False An automatic clothes washer with a standpipe may empty above the laundry tub. True False An automatic clothes washer with a standpipe is rated for ______. 1 DFU 2 DFUs 3 DFUs 4 DFUs 5 DFUs A wet vent carrying 5 DFUs needs a minimum pipe diameter of ______. 1 ¼ inches 1 ½ inches 2 inches 3 inches 4 inches Quiz 7 On island fixtures, below the floor level shall have a slope of not less than ______ inch per foot. 1/8 1/4 5/16 1/2 1 The return bend used under the drain board shall be a one piece fitting or an assembly of a ______ degree, a ______ degree, and a ______ degree elbow in the order named. 45 – 90 – 45 90 – 45 – 90 90 – 180 – 90 22 ½ – 90 – 22 ½ none of the answers provided Combination waste vent systems are used primarily for ______. floor sinks hospital private homes meat processing centers none of the answers provided A combination waste branch that exceeds ______ feet shall be separately vented in an approved manner. 5 10 15 20 30 A combination waste pipe is to be sized not less than ______ pipe size(s) larger than the requirements shown in Chapter 7. 1 2 3 4 5 A combination waste system may service ______. only floor sinks floor sinks and water closets (WC) floor sinks, water closets (WC) and urinals floor sinks, water closets (WC), urinals and kitchen sinks none of the answers provided The maximum number of fixtures that a circuit vent can connect to is ______. 2 4 6 8 12