Q.1) Unions shall be installed in a water supply system within 12 inches of ___ A. a control valve B. a house valve C. regulating equipment D. transition fittings Q.2) Vent pipes protect fixture traps against ___ A. evaporation B. siphonage C. clogging D. cross-connections Correct Q.3) Parallel vent stacks are required for drainage stacks that extend above the building drain ___ A. five stories or more B. 10 stories or more C. 50 ft D. 100 ft Q.4) The maximum fixture unit loading allowed on a 2-inches waste stack is ___ A. 4 B. 6 C. 8 D. 16 Q.5) All malleable iron water fittings shall be ___ A. 2 inch or smaller B. galvanized zinc coated C. flanged D. removed Q.6) the color stripe on type "K" hard-drawn copper tubing is ___ A. green B. blue C. red D. yellow Q.7) Stills, sterilizers and similar equipment that produce waste shall be __ A. connceted directly to the building drains B. indirectly connected to a lavatory taolpiece C. indirectly connected by means of an airgap D. directly connected to the building drain using an airbreak Q.8) The size of the yoke vent that making the yoke vent intersects with the drainage stack is __ A. not less in diameter than either the drainage or the vent stack, whichever is smaller B. a minimum of 4 inches C. two pipes sizes larger than the drain line D. two pipes sizes smaller than the drain line Q.9) Each vent pipe or stack shall extend through its flashing and shall terminate vertically above the roof at least ___ A. 6 inches (Your Answer) B. 12 inches C. 18 inches D. 24 inches Wrong Q.10) A standpipe for a clothes washer shall have a minimum and maximum length of _ A. 4in. and 12in. B. 18in. and 30in. (Correct Answer) C. 18in. and 24 in. D. 12in. and 36in. (Your Answer) Wrong Q.11) ABS or PVC-DWV piping installations exposed within ducts or plenums shall be limited to a flame-spread index of not more than 25 or a smoke index of 50 except for __ A. two-storey buildings B. structures not over three floors above grade (Your Answer) C. the restriction found in IS 5 and 9 D. single family homes (Correct Answer) Wrong Q.12) Sheet lead used for flashins of vents terminals shall be not less than __ A. 2 lbs per sq. ft B. 3 lbs per sq. ft (Correct Answer) C. 4 lbs per sq. ft (Your Answer) D. 5 lbs per sq. ft Correct Q.13) With few exceptions, all horizontal drainage piping shall be provided with a cleanout at ___ A. each 45-degree fitting B. its upper terminal (Your Answer) C. each offset Correct Q.14) The addition of leak-sealing additives to joint packing shall be __ A. legal B. by approval of the engineer C. by approval of the architect D. prohibited (Your Answer) Wrong Q.15) A horizontal drain pipe has an existing load 30 fixture units, after connecting the discharge pipe from an ejector rated 60 gpm, the total load on the horizontal drain pipe will be ___ A. 90 fixtures B. 120 fixtures (Your Answer) C. 130 fixtures D. 150 fixtures (Correct Answer) Wrong