Plumbing Study Exam Questions With Complete Solutions

BRANCH VENT correct answer: A vent connecting one or more individual vents with a vent stack or stack vent. CIRCUIT VENT correct answer: A branch vent that serves two or more traps and extends from in front of the last fixture connection of a horizontal branch to the vent stack. COMMON VENT correct answer: A vent connecting at the junction of two fixture drains and serving as a vent for both fixtures. A single vent that ventilates multiple traps, in the case of back to back fixture. CONTINOUS VENT correct answer: A vertical vent that is the continuation of the drain to which the vents connect. DRY VENT correct answer: A vent that does not serve as drain and is located where if is not exposed to back up of waste from a drainage pipe. GROUP VENT correct answer: A branch vents that performs its functions for two or more traps. INDIVIDUAL VENT correct answer: A pipe installed to vent, a fixture trap and w/c connects with the vent system above the fixture served or terminates in the open air. LOOP or CIRCUIT VENT correct answer: A circuit vent which loop backs to connect with a stack vent instead of a vent stack. Any vent connecting a horizontal branch or fixture drain with the stack vent of the originating waste or soil stack. LOCAL VENT correct answer: Is a pipe on the fixture side of the trap through which vapor or foul air is removed from a room fixture. MAIN VENT correct answer: The principal artery of the venting system to which vent branches may be connected. RELIEF VENT correct answer: A vent installed so as to permit additional circulation of air between the drainage and vent systems where the drainage systems might otherwise be air bound. UNIT VENT correct answer: An arrangement of venting so installed that that one vent pipe will serve two traps. STACK VENT correct answer: The extension of a soil or waste stack above the highest horizontal drain connected to the stack horizontal drain, the uppermost end above the roof. WET VENT correct answer: A vent which also serves as a drain. YOKE VENT correct answer: A pipe connecting upward from a soil or waste stack to a vent stack for the purpose of preventing pressure changes in the stack. BACKFLOW correct answer: Is the flow of water or other liquids, mixtures or substances into the distributing pipes of a supply of water from any source other than its intended source. BACK SIPHONAGE correct answer: Is the backflow of used, contaminated or polluted water from a plumbing fixture due to negative pressure. BATTERY OF FIXTURE correct answer: Refers to any group of two or more similar adjacent fixtures which discharge into a common horizontal waste or soil branch. BLANK FLANGE correct answer: A flange that is not drilled BLIND FLANGE correct answer: A flange that closes the end of a pipe line used to discharge water CAULKING correct answer: Is plugging an opening with oakum, lead or other materials COUPLING correct answer: A short internally threaded section of pipe, used to join two pipes of conduits UNION correct answer: Used to connect the two ends of two pipes, neither of which can be turned NIPPLE correct answer: A short length of pipe with threads at each end; used to join couplings or