TX Journeyman Plumber - HW ?'s from Bobby Doran's Class Questions With Complete Solutions

Hot & cold water piping may be tested with _____. correct answer: 50 psi or the working pressure of the water in the system for at least 15 mins A stack as defined in the code is _____. correct answer: the vertical main of a soil, waste or vent piping which extends one or more stories A device to prevent backflow into potable water system is called a _____. correct answer: backflow connection/backflow preventer Copper tube and fittings used for drainage and vent piping installed above ground shall be at least _____. correct answer: copper DWV tube Horizontal drainage lines connecting with horizontal drainage lines shall enter through _____. correct answer: 45 degree wye branches The vertical distance between a fixture outlet and the trap weir shall not exceed _____. correct answer: 24 inches Concealed slip joint connections require a _____. correct answer: 12x12 access panel The critical level of a urinal flushometer vacuum breaker to the highest part of the fixture is _____. correct answer: 6 inches Water closet tank ballcocks shall be installed with the vacuum breaker critical level at least _____. correct answer: 1 inch above the full opening of the overflow tube The maximum distance of a gas shutoff valve from a gas appliance (except for range and dryer connections) is _____. correct answer: 6 feet The minimum size of any piping outlet for a free standing gas range shall be _____. correct answer: 3/4 of an inch A plumbing permit expires if work authorized by the permit is not started within _____. correct answer: 180 days