Board Exam

1. The effective thread of a ¾” diameter screwed steel pipe is 1 ¼” long 2. Screwed steel pipe 2 ½” diameter should have this number of threads for effective jointing. 8 3. What is the minimum size of water supply inlet for urinal stall? ¾” 4. The most common and widely used gate valve. Split Wedge 5. A common heat source for indirect water heater. Electricity 6. Waste in plumbing drainage is prohibited waste when you discharge toxic waste 7. What is minimum size of water supply inlet for the kitchen sink? ½” 8. The simplest and cheapest bonnet design of valve is Welded 9. What is the setting height from the floor for a wall hung lavatory water supply inlet? 24” 10. How much is the plumbing permit fee for one lavatory in excess of the one unit minimum required? NBC P6.00 11. The effective length of a 3” diameter steel pipe? 1 5/8” long 12. What is the minimum size of water supply inlet for a shower stall? ½” 13. What do you call this valve installed at the solution line of a pump to prevent the loss of prime of the pump? Check Valve 14. Polyvinyl chloride (PVC) pipes used for drain waste (DWV) are manufactured based on the standard set by this organization? ANSI 15. Water for domestic use comes from these sources: Ground water, Rain water, Surface water 16. How does a safety mechanisms of a hot water system work? Automatically 17. Plumbing pipe color coded in Aqua blue stripe or band is identified as Potable Water 18. Stainless steel plumbing fixture are manufactured based on the standard set by U.I 19. The best solder for brazing/soldering joints is 50-50 tin alloy 20. Recommended for breaking up remains of stoppages by straight auger. Retrieving Auger 21. Recommended for clearing back to back Amounted fixtures like lavatories or sinks where cable needs to be led into down the pipe. Crop Head Auger 22. Gasses found in the Septic Tank. Methane gas, Ammonia, Carbon monoxide 23. What is the setting height from the floor for a water supply inlet of a flush tank water closet.? 16” 24. A male thread fitting with square head used for dousing another female fitting is called nipple. 25. A recommended hot water supply to a hotel lavatory. 4 GPH 26. Copper pipes are sized 1/16 bigger than their inside diameter. 27. To boost the water pressure of hot water, use Circulating Tank Pump 28. Recommended for clearing pipe line blocked heavily with roots, Sow Tooth Cutter. 29. Which type of wrench is used to assemble hubless joint, Chain wrench 30. When silt and dirt is removed from water, the process is called Siltation. 31. Pipe tool with floating hook jaw, non-stick adjustment nut and replaceable hook and jaw, Straight Pipe Wrench 32. Recommended hot water supply to a therapeutic bath 50GPH 33. What is the setting distance from the floor for a bidet waste drain outlet, 16”

34. Electric water heaters are , manufactured based on the standard set by this organization, U.I 35. What is the minimum pressure outlet to operate a flush valve in water closet and urinal, 15 psi 36. The appropriate type of material for vent pipes in an acid waste system is DWV Copper 37. Where is surface water for domestic used collected? Mountains 38. What is the least method to lay a PB or PE tube on trenches? On steel sleeves 39. What really seals a caulked joint? Oakum 40. What fitting is needed in a cleanout if the pipe is 6 inches diameter? Elbow 41. PE plastic tubing is a material used for water service connection. Polyethylene 42. What produces when magnesium salt is present in water? Total hardness 43. What should be used in supporting suspended horizontal single run plumbing pipe? Clevis Hanger 44. What kind of lubricant is used during operation for threading machine? Engine Oil 45. Iron in the form of ferrous bicarbonate can be removed from water by means of_____________ 46. When should pipe be reamed to remove burrs? After cutting 47. Water is many times heavier than air? 830 times 48. What should be done before working with lead that is wet? Wipe it 49. How many lavatory shall be installed in a school with 240 male students? 5 50. What water is a portion of rainwater which percolates into the earth to form underground deposit? Ground Water 51. What is the minimum retention period of waste water in a septic tank which will settle and stabilize solids suspended in solids? 24 hours 52. What is the size of the downspout if the rainfall intensity is 100mm (4”) if the roof deck is 425 square meters? 100mm diam 53. Which of these stages is not among the cycle of water? Saturation. (Precipitation, evaporation, condensation) 54. What is the name of the process in which steel and wrought iron pipe rust? Tuberculation 55. What system uses an assembly of mechanical device which raise water using compressed air as delivery method? (pneumatic) air pressure system 56. What is the horizontal rainwater pipe with 2% slope if the max rainfall is 150mm on a 200 sq.m slab? 300 57. How many female office employees is suited for 5 lavatories? 58. How many persons can be served by 6” CHB wall and 6” concrete slab septic tank whose sludge chamber outside dimensions is 2.10m x 3.90m long x 2.00 m deep including .20 air space? 59. Which of these maintenance procedures maybe performed on a pump while it is running? Tightening the packing nut 60. What is the distance between the faucet outlet and the flood rim of the basin into which it discharges? Air Gap 61. Where is the rainwater for domestic use collected? Roofs 62. A flush valve urinal wall hung type should have a minimum water supply size? ¾ inch

63. What pressure is loss caused by water flowing thru the pipe hub and spigot type? Friction loss 64. Which of these joints is adoptable to assemble cast iron pipe hub and spigot type? Screwed joint/compression joint 65. What is the device or fitting used to provide a liquid seal to keep sewer gasses out? Trap seal 66. How can acidity of water be neutralized? Green and filtration 67. Which of these pipe is measured on the outside diameter? Concrete Pipe 68. What is the size of the gutter 2% slope if the maximum rainfall is 150mm on 13 sm?_______ 69. The removal of silts, dirts and other objectionable minerals in water is called filtration. 70. One of first steps in the selection of a suitable water supply store is water demand /potability 71. What is the test used in determining if a newly installed water system is leak free? Leak Test 72. What is the partner of the gate valve in the G.I pipe system of installation? Check Valve 73. What is the recommended size of service pipe approved by MWSS for a two-storey residence? 1” or 25mm 74. What is the minimum size of water supply for water closet flush valve type? 1 inch 75. How can sulphur in the form of hydrogen sulphates be removed from water? Evaporation 76. What is joining compound is used to assemble polyvinyl chloride pipe and fitting together? Solvent Cement 77. What is the common pipe material use for in house water system? G.I Pipe 78. What is the required when cast iron pipe and fittings of different size are to be joined or connected? An Increaser or reducer 79. What is the size of gutter 2% slope if the maximum rainfall is 75mm on 11 sq.m slab? 150mm 80. What is the size of gutter 2% slope if the maximum rainfall is 100mm on 206 sq.m slab? 250mm 81. What is the size of the horizontal rainwater pipe whose area is 3500 sq.ft, max rainfall intensity is 150mm on a 390 sq.m slab? 375mm diam 82. What is the size of the horizontal rainwater pipe with 2% slope if the max rainfall is on a 390 sq.m slab? 390 sq. m slab. 375mm 83. What is the standard size of clean-out for 4” pipe? 4” diam 84. What is the number of thread of 1” diam to 2” diam for effective joints? 11 ½” 85. Water collected from spring and well as source of water for domestic water supply is called? Surface Water 86. What is meant by PE plastic tube material used for service connection? Polyethylene 87. What is the size of the gutter 2% slope if the maximum rainfall is 50mm on 28 sq.m? 175mm 88. What is the size of the downspout if the rainfall intensity is 100mm on 1200sm deck roof? 150mm 89. How does the safety feature of a service hot water system work? Automatically

90. How many female factory workers are suited to 4 ? 400 91. Plumbing fixtures classified as Class 3 are intended for? Office Building 92. How many female stadium audience is suited for 3 w.c? 300 93. What is the minimum horizontal clear distance of water well supply to building sewer as per UPC? 5feet/1.50m 94. An automatic safety device of a hot water supply is always provided in order to eliminate overheating? 95. What is is the cause of objectionable taste and odor of water? Algae 96. How do you measure the rainfall intensity? Inches/hour 97. What is the meaning of u placed before PVC pipe a material used for a water system? Unplasticized 98. What do you call the vertical distance of a column of water from the pump discharge? Pressure Head 99. Rain water for domestic use is collected from roofs. 100. A seepage is defined as sewage terminal, receiving both liquid and solid waste 101. A vertical vent that is continuation of the drain to which it connects is a CONTINOUS VENT 102. A piping system designed to control and conveys excess ground water to a suitable location STORM PIPING DRAINAGE SYSTEM 103.