Plumbing Final Pre-borad

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SANITARY SCIENCE AS APPLIED TO BUILDINGS

FINAL PRE-BOARD EXAMINATION

NAME:______________________ SCORE:______________

INSTRUCTION: Read the following items carefully. Shade the letter of your answer in the answer sheet.

1. Is the unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, plumbing fixtures, or other device and the flood level rim of the receptacle.

a. Air Break b. Air Gap

c. Trap Gap d. Trap Seal

e. none of the above

2. Is any pipe that conveys the discharge of water closets or fixtures having similar functions, with or without the discharge from other fixtures, to the building drains (house drain) or building sewer (house sewer).

a. Waste Pipe b. Soil Pipe

c. PVC Pipe d. Vent Pipe

3. Is a Y connection used on fire lines so that two lines of hose maybe connected to 3. Is a Y connection used on fire lines so that two lines of hose maybe connected to a hydrant or to the same nozzle.

a hydrant or to the same nozzle.

a. Siamese Connection b. Tee

c. Coupling d. Elbow

4. Is a fitting or device so designed as to provide when properly vented a liquid seal4. Is a fitting or device so designed as to provide when properly vented a liquid seal that will prevent the back passage of air without materially affecting the flow of that will prevent the back passage of air without materially affecting the flow of sewage through it.

sewage through it.

a. trap seal b. drain

c. indirect trap d. trap

5. Is the device located at the bottom of the tank for flushing water closets and 5. Is the device located at the bottom of the tank for flushing water closets and similar fixtures.

similar fixtures.

a. flushometer valve b. gate valve

c. globe valve d. flush valve

6. Is the lowest portion of the inside of any pipe or conduit that is not vertical. 6. Is the lowest portion of the inside of any pipe or conduit that is not vertical.

a. crown b. lining

c. invert d. ring

7. Is the slope or fall of pipe in reference to fraction of an inch per foot length of pipe.

a. grade b. coefficient

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8. A controlled outlet on a pipeline used to discharge water. 8. A controlled outlet on a pipeline used to discharge water.

a. gate valve b. blow-off

c. air valve d. manhole

9. Includes all piping within the public and private premises that conveys sewage, rainwater, and other liquid waste, to a legal point of disposal. It does not include the mains of public sewer system private or public sewerage treatment disposal plant.

a. water supply system b. vent system

c. drainage system d. fire protection system d. all of the above

10. Are underground drain pipes that receive sub-surface or seepage water only and convey it to a place disposal.

a. subsoil sewer b. subsoil waste pipe

c. soil pipe d. subsoil drain

e. none of the above 11.

11. Any condition or act which increases or may cause an increase in the probability of the occurrence of fire.

a. fire hazard b. fire accident

c. fire risk d. fire result

12. A piece of metal or an electrical conductor used to bypass a safety device in an electrical system.

a. wire fault b. illegal connections

c. jumper d. transmission wire

13. No more than ____ water closets shall discharge into any 75 mm horizontal soil 13. No more than ____ water closets shall discharge into any 75 mm horizontal soil branch, house drain.

branch, house drain.

a. 2 b. 3

c. 4 d. 5

14. Is the result of minus pressure in the drainage system.

a. siphonage b. capillary action

c. back pressure d. wind effect

15. Chemical compound that is commonly intended of producing explosion. 15. Chemical compound that is commonly intended of producing explosion.

a. corrosive b. explosive

c. flammable d. inflammable

e. none of the above 16.

16. A type of standpipe system in which the pipes are normally not filled with water. Water is introduced into the system thru Fire service connections when needed.

a. Dry Standpipe b. Wet Standpipe

c. Combination Standpipe d. Fire Standpipe e. all of the above

17. Any liquid which causes fire when in contact with organic matter or with certain chemicals.

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a. Combustible b. Corrosive Liquid

c. Carcinogenic d. Flammable

18. A pipe system that does not connect directly with the drainage system but 18. A pipe system that does not connect directly with the drainage system but conveys liquid wastes by discharging into a plumbing fixture, interceptor or conveys liquid wastes by discharging into a plumbing fixture, interceptor or receptacle directly connected to the drainage system.

receptacle directly connected to the drainage system.

a. indirect waste b. direct waste

c. wastewater d. water supply

19. Portion of the drainage pipe installation, designed to maintained balancePortion of the drainage pipe installation, designed to maintained balance atmospheric pressure inside the system to prevent problems.

atmospheric pressure inside the system to prevent problems.

a. storm drainage b. drainage system

c. fire protection d. ventilation e. none of the above

20. Receptacles for wastes that are discharged into the drainage system.Receptacles for wastes that are discharged into the drainage system.

a. water tank b. septic tank

c. fixtures d. cesspool

e. all of the above

21. Which is that pipe in the building premises that conveys water from the water service pipe to the plumbing fixtures and other water outlets?

a. fixture supply pipes b. riser

c. fixture supply branches d. water distributing pipes e. all of the above

22. Which is the branch vent that loops back and connects with stack vent instead of a vent stack?

a. loop vent b. loop connection

c. circuit vent d. branch vent interval e. horizontral branch

23. In the line of a piping, which is the combination of elbows or bends which brings one section of the pipe out of line but into a line parallel with other sections?

a. horizontal barnach b. loop vent

c. offset d. vent header

e. parallel stacks

24. Which are installed receptacles, devices, or appliances which are supplied with water or which receive or discharge liquids, with or without discharge into the drainage system with which they may be directly or indirectly connected?

a. water heaters b. lavatory

c. valves d. plumbing fixtures

e. gravity tank

25. Which is the device designed and installed so as to separate and retain deleterious, hazardous or undesirable matter from the normal wastes and permit normal sewage or liquid wastes to discharge into the disposal terminal by gravity?

a. grease trap b. fixture trap

c. acid neutralizing trap d. interceptor e. drum trap

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26. Which is a water conductor from the roof to the building storm drain, combined building sewer or other means of disposal?

a. Storm water stack b. Waste stack

c. leader d. Sullage stack

e. Vertical main

27. Which is the kind of water which is satisfactory for drinking, culinary, and domestic purposes and meets the requirements of the health authority having jurisdiction?

a. Potable water b. Safe water

c. Pure and wholesome water d. Drinking water supply e. Domestic water

28. Which backflow prevention device consists of a a 90-degree with a hood on its top to allow air to enter the water system if siphon attempts to form to protect potable water from being contaminated by unsafe source?

a. Check valve b. Atmospheric vacuum breaker

c. Pressure vacuum breaker d. gate valve e. None of the above

29. Which is the unobstructed vertical space between the water outlet and the flood level rim of a fixture?

a. Air vent b. Air gap

c. Air space d. Air break e. None of the above

30. Which is termed as the vertical unobstructed space between the waste outlet and the receiving waste pipe where the discharge of wastes from certain appliances will discharge to the drainage system?

a. Air vent b. Air gap

c. Air space d. Air break

e. None of the above

31. Which is that part of the lowest piping of the drainage system, which receives the discharge from the soil waste, and other drainage pipes inside the wall of the building?

a. Horizontal branch b. Soil stack

c. Stack vent d. Building sewer

e. Building drain

32. Which is that part of the horizontal piping of the drainage system which extends from the end of the building drain and conveys waste into a public sewer, private sewer, individual sewage-disposal system or other point of disposal

a. Sump pit b. Building sewer

c. Horizontal branch d. Header

e. Building trap

33. Which is that portion of the drainage system which cannot drain by gravity into the building sewer?

a. Building drain b. Building drain

c. Basement drain d. Building subdrain e. Building storm drain

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34. Which is the following back of used, contaminated or polluted water from a plumbing fixture or vessel into a water supply pipe due to a negative pressure in such a pipe?

a. Back flow b. Negative pressure c. Back pressure d. Back siphonage e. Full flow

35. Which is a group of two or more similar adjacent fixtures which discharge into a common horizontal waste or soil branch?

a. Fixture branches b. Drainage fixture units c. Battery of fixtures d. Plumbing fixtures e. All of the above

36. Which is a type of branch vent that serves two or more traps and extends from in front of the last fixtures connection of a horizontal branch to vent stack?

a. Branch interval b. Loop vent

c. Vent header d. Combination fixture e. Circuit vent

37. Which backflow prevention device consists of a valve that normally allows fluid (liquid or gas) to flow through it in only one direction?

a. Vacuum breaker b. Gate valve c. Pressure regulating valve d. Check valve e. None of the above

38. Which the outlet on a boiler which permits emptying or discharge of sediments from that boiler?

a. Air vent b. Drain pipe

c. Gate valve d. Air relief valve

e. Boiler blow off

39. Which is the general term applied to any part of the piping system other than main, riser, or stack and refers to the pipe the connect similar types of types of pipes?

a. Branch b. Drain

c. Battery of fixtures d. Horizontal pipes e. Header

40. Which is the length of soil or waste stack corresponding in general to a story height, but in no case less than 8 feet within which the horizontal branches from the floor or story of a building are connected to the stack?

a. Fixtures branches b. Battery of fixtures c. Branch interval d. Soil stack length e. Storey height

41. Which is a kind of fixture combining one sink and tray or a two- or- three– compartment sink or tray in one unit?

a. Combination fixture b. Drainage fixtures c. Slop sink d. Soil stack length e. Drainage fixtures unit

42. Which is the maximum vertical depth of liquid that a trap will retain, measured between the crown of a weir and top of the dip of the trap?

a. Air gap b. Air break c. Trap seal d. Branch interval

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e. Hydraulic gradient

43. Which type of vent connects upward from a soil of waste stack to a vent for the purpose of preventing pressure changes in the stack?

a. Relief vent b. Branch vent c. Main vent d. Yoke vent e. Common vent

44. Which is the any pipe that conveys the discharge of water closets, urinals, or fixtures having similar functions, with or without the discharge from other fixtures, to the building drain or building sewer?

a. Soil stack b. Soil pipe c. Sewage d. Horizontal branch e. Building sewer

45. Which is that main horizontal pipe that receives storm water and sewage? a. Combined building drain b. Building sewer

c. Combined building sewer d. Building trap e. Private sewer

46. Which piping system includes all the piping within public or private premises and conveys sewage, rainwater, or other liquid wastes to an acceptable point of disposal?

a. Building drainage system b. public sewers c. Building drain d. Building sewer e. All of the above

47. Which is the term used to describe soil waste or waste systems where all piping is of threaded pipe, tubing, or other such rigid connection?

a. Threaded piping b. Sovent systems c. Building drainage system d. Durham system e. Joint connection

48. Which is the drain pipe connecting several fixtures?

a. Horizontal drain b. Horizontal fixture branch c. Branch internal d. Battery fixtures

e. All of the above

49. Which is the type of vent that connects at the junction of two fixture drains and serving as vent for both fixtures?

a. Continuous vent b. Stack vent c. Vent stack d. Main vent e. Common vent

50. Which is the physical connection between two otherwise separate piping systems, one of which contains potable water and other waster of unknown or questionable safety?

a. service connection b. continous connection c. main water line d. illegal connection e. cross connection

51. Piping installation wherein both the mains and the distribution pipes are 51. Piping installation wherein both the mains and the distribution pipes are constantly filled with water.

constantly filled with water.

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c. Combination Standpipe d. Fire Standpipe e. all of the above

52. A passage hall or antechamber between the outlet doors and the interior parts of house or building.

a. corridor b. egress

c. main entrance d. vestibule

53. No chemical wastes shall be discharged into the ground, local sewer or other 53. No chemical wastes shall be discharged into the ground, local sewer or other disposal.

disposal.

a. True b. False

c. Maybe d. No relation

e. none of the above 54. Caused by plus pressure.

a. siphonage b. capillary action

c. back pressure d. wind effect

55. Floor drains subject to backflow shall not be directly connected to the drainage system.

a. True b. False

56. Bonfires is permitted within 20 meters away of any structures. 56. Bonfires is permitted within 20 meters away of any structures.

a. True b. False

57. Giving false or malicious alarms is prohibited at all times.Giving false or malicious alarms is prohibited at all times.

a. True b. False

58. 1.No building sewer shall be smaller than _____ diameter nor less in size of1.No building sewer shall be smaller than _____ diameter nor less in size of building drain.

building drain.

a. 75 mm c. 100 mm

c. 50 mm d. 150 mm

e. none of the above 59. It is also called Back vent.

a. relief vent b. circuit vent

c. main vent d. individual vent

60. Bathtubs should be provided with waste outlets and overflows at least ____ inBathtubs should be provided with waste outlets and overflows at least ____ in diameter and should be equipped with suitable stoppers.

diameter and should be equipped with suitable stoppers.

a. 1.5 inches c. 3.8 cm

c. 0.125 ft. d. none of the above

e. all of the above

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61. Are those which are liable to burn with extreme rapidity or from which poisonousAre those which are liable to burn with extreme rapidity or from which poisonous gases or explosions are to be expected in the event of fire.

gases or explosions are to be expected in the event of fire.

a. high hazard content b. moderate hazard content c. ordinary hazard content d. extra-ordinary hazard content e. none of the above

62. Chemical wastes shall be discharged into the sewer main.Chemical wastes shall be discharged into the sewer main.

a. True b. False

63. Employed where two or more fixture traps are installed on a horizontal soil orEmployed where two or more fixture traps are installed on a horizontal soil or waste branch.

waste branch.

64. Installed to ventilate the soil and waste pipe and the connecting branches ratherInstalled to ventilate the soil and waste pipe and the connecting branches rather than the fixture traps.

than the fixture traps.

e. none of the above 65. R.A. 1378 is also known as

a. Fire Code of the Phil b. Plumbing Code of the Phil. c. Building Code of the Phil. d. Sanitation Code of the Phil. e. none of the above

66. Roof joint shall be

a. gas tight c. smoke tight

b. air tight d. water tight

67. A fixture designed for the washing of hands or face, sometimes called washbasin

a. sink c. bathtub

b. lavatory d. shower

68. A stack as defined in the Code is

a. vertical main soil , waste or vent piping c. the main vent

b. any vertical vent d. horizontal vent

69. Means any pipe or fitting which makes an angle of more than 45 deg. with vertical.

a. vertical pipe b. horizontal pipe.

c. cross pipe d. diagonal pipe

70. Is a Y connection used on fire lines so that two lines of hose maybe connected to a hydrant or to the same nozzle.

a. fire hydrant b. tee

c. siamese connection d. elbow e. none of the above

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71. Is the extension of a soil or waste stack above the highest horizontal drain connected to the stack.

a. stack vent b. vent stack

c. battery of fixtures d. branch e. none of the above

72. Is a quantity in terms of which the load producing effects on the plumbing system of different kinds of plumbing fixtures are expressed on some arbitrarily chosen scale.

a. fixture unit b. receptacle

c. battery of fixtures d. stack e. none of the above

73. A system consisting of of a combination of an automatic fire or smoke detection systemconsisting of of a combination of an automatic fire or smoke detection system and a system of high velocity water spray nozzle.

and a system of high velocity water spray nozzle.

a. sprinkler vent method b. spray nozzle method c. rolling shutter method d. all of the above e. none of the above

74.

74. A device that contains within it chemicals, fluids, or gases for extinguishing fires, theA device that contains within it chemicals, fluids, or gases for extinguishing fires, the means for application of its contents for the purposes, and is capable of being readily move means for application of its contents for the purposes, and is capable of being readily move from place to place.

from place to place.

a. fire hose b. fire box

c. fire extinguisher d. all of the above e. none of the above

75.

75. Fixture unit of water closets Fixture unit of water closets

a. 1 b. 2

c. 5 d. 6

76. A hose connection with two-gated outlets permitting 2 connections of the same or smaller coupling diameter to be taken from a single supply line.

a. Siamese Connection b. Wye

c. Cross Connection d. Coupling

77. Is the water-supply pipe for public or community use. It is also called a street main.

a. Water Service Line b. Public Water Line

c. Water Main d. NAWASA Line

78. An arrangement of venting so installed that one vent pipe will serve 2 traps.

a. Dual Vent b. Unit Vent

c. Common Vent d. Branch Vent

79. An approved tank or pit, which receives sewage or wastewater and is located below the normal grade of the gravity system and must be emptied by mechanical means

a. Pump b. Sump

c. Septic tank d. Step-down Tank

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80. That portion of rainfall or other precipitation which runs off over the surface of the ground.

a. Surface water b. Ground water

c. Water table d. Run-off water

81. A vertical pipe, or a reservoir into which water is pump to give it at a head

a. Supply pipe b. Reservoir pipe

c. Wet vent d. Standpipe

82. The extension of a soil or waste stack above the highest horizontal drain connected to the stack

a. Wet vent b. Stack vent

c. Dry vent d. Extended vent

83. Is a classification of standpipe where water pressure is maintained at all times. a. Wet standpipe b. Pressurized standpipe

c. Cold standpipe d. Dry standpipe

84. It is a standpipe having no permanent water inside the pipe a. Wet standpipe b. Pressurized standpipe

c. Cold standpipe d. Dry standpipe

85. Tube made of plastic material and colored black. The cross-sectional shape is normally oval and is denoted by its outside diameter. Normally used as water service connection from main to meter.

a. Polybutylene b. Polyethylene

c. Polyvinyl chloride d. ABS

86. A hemp or old hemp rope soaked in oil or tar to make it waterproof

a. Lead b. Seal

c. Oakum d. Tight joint

87. Any system of continuous piping, which is the principal artery of the system where branches are connected

a. Main b. Central artery

c. Major piping d. Major outlet

88. A pipe connected from building gutter to the downspout or conductor

a. Leader b. Gutter

c. Downspout d. Vertical storm pipe

e. None of the above Problem 1:

A building has a following fixtures number: 16 lavatories, 16 water closet, 1 shower head, 1 kitchen sink

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89. Determine the total fixture unit.

a. 116 b. 140

c. 152 d. 168

e. none of the above 90. What would be the Qt.

a. 928 gal. / min b. 1120 gal. / min. b. 1216 gal. / min d. 1344 gal. / min. c. none of the above

Problem 2:

A 25 storey building has a dry standpipe system. The interval of each floor is 3 meters.

91. Determine the minimum pressure of Fire Service Connection in order to deliver the water up to the highest point of the building.

a. 43 psi b. 27 psi

c. 21 psi d. 40 psi

92. What would be the total pressure head?

a. 75 meters b. 65 meters

c. 55 meters d. 45 meters

93. What is the pressure head at the 10th_floor?

a. 15 m. b. 15 psi

c. insufficient date d. all of the above e. none of the above

Problem 3

A residential house the ff. fixtures: 6 water closets, 1 lavatory, 2 kitchen sink, and 2 shower bath.

94. What is the maximum water demand?

a. 288 liters b. 1020 liters

c. 1080 liters d. 900 liters

95. What is the probable water demand assuming 50% simultaneous use.

a. 32 gal. b. 144 gal

c. 136 gal d. 120 gal

96. What would be the minimum size of building drain?

a. 50 mm b. 75 mm

c. 100 mm d. 150 mm

e. none of the above Problem 4

A cistern tank 2m x 3m x 4m was supplied by the 100 mm diameter pipe with a flowrate of 20 liters per sec.. Determine the ff.

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97. The velocity of water at the pipe.

a. 1.56 m/s b. 2.05 m/s

c. 2.55 m/s d. 3.05 m/s

e. none of the above 98. Time it takes to full the tank.

a. 10 minutes b. 20 minutes

c. 30 minutes d. 40 minutes

99. Flowrate if 100 mm pipe change into 150 mm pipe diameter

a. 35 liters/sec b. 45 liters/sec

b. 50 liters/sec d. 55 liters/sec

100. Time to full the tank if 100 mm and 150 mm pipe diameter will both installed.

a. 4.15 minutes b. 4.65 minutes

b. 6.15 minutes d. 6.65 minutes