Session 8. Flashcards by Pablo tivonyuk

A trap borer should be used by a plumber when:
A. Cutting internal threads.
B. Preparing copper joints for sweating.
C. Joining cast iron to screw pipe for a solder nipple.
D. Preparing lead pipe for a solder nipple.

D. Preparing lead pipe for a solder nipple.

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2. Hydrostatic test should be done by using:
A. Water.
B. Smoke.
C. Air.
D. Kerosene.

A. Water.

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3. The center to-center measurement of 1 on figure 9 is most nearly equal to:
A. 20 inches.
B. 25 inches.
C. 30 inches.
D. 65 inches.

B. 25 inches.

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4. The center to-center measurement of 2 on figure 9 is most nearly equal to:
A. 20 inches.
B. 25 inches.
C. 30 inches.
D. 45 inches.

B. 25 inches.

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5. The center to-center measurement of 3 on figure 9 is most nearly equal to:
A. 30-1/2 inches.
B. 28-7/8 inches.
C. 28-3/4 inches.
D. 27-3/4 inches.

C. 28-3/4 inches.

T=1.414x20=28-1/4”.

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6. The center to-center measurement of 4 on figure 9 is most nearly equal to:
A. 23-1/2 inches.
B. 28-1/4 inches.
C. 29 inches.
D. 31-1/4 inches.

B. 28-1/4 inches.

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7. An offset is made in a hot water riser that eventually fills with air. As a result, which one of the following is most likely to occur:
A. Water hammer.
B. Decrease flow.
C. Increase flow.
D. Noise during flow.

B. Decrease flow.

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8. If a set of sanitary plans are drawn to scale of 1-1/2inches equal to one foot, the plans are said to be:
A. One sixteenth size.
B. One eighth size.
C. One quarter size.
D. One tenth size.

B. One eighth size.

1-1/2=3/2x1/12=1/8

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9. When the first of the falling water has acquired a velocity greater than that of the water following it, the development that may be expected is:
A. Back pressure.
B. Siphonage.
C. Water-hammer.
D. Surging.

B. Siphonage.

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The pump generally selected to discharge the contents of a sewage ejector pot is:
A. Reciprocating pump.
B. Centrifugal pump.
C. Rotary pump.
D. Ejector pump.

B. Centrifugal pump.

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11. Six water closets are connected in a battery without individual vents. A pipe that is connected to the soil stack and the branch soil pipe between the 5th and sixth water closets is defined as:
A. Loop vent.
B. Relief vent.
C. Circuit.
D. Yoke vent.//

C. Circuit.

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12. A type of fitting best suited as a foot-piece (connecting a stack to a building drain) is:
A. Two 45* ells and a 10 inch nipple.
B. A long sweep 90* ell with a test tee.
C. Wye and 1/8 bend.
D. Two 45 ells and a 6-inch nipple.

C. Wye and 1/8 bend.

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13. A six inch fresh-air-inlet plate has forty-eight 3/4-inch diameter holes drilled into the plate. The number of 1/2-inch diameter holes needed to meet the minimum requirements is most nearly:
A. 50.
B. 45.
C. 40.
D. 35.

C. 40.

6x6=36, .75x.75=0.5625 .5625x48=27 36-27=9 ,5x,5=0.25 9/0.25=36 holes.

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In making a vertical caulked (no offset) joint on cast iron soil pipe, the tools and material required are usually:
A. Oakum, solder, hammer and inside and outside irons.
B. Oakum, swab, scraper, trowel and cement.
C. Oakum, lead, pouring rope, hammer and inside and outside irons.
D. Oakum, lead, hammer and outside irons.

D. Oakum, lead, hammer and outside irons.

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15. Building (house) traps when below a cellar floor shall be made accessibly by extension of two hand holes. The maximum length hand holes may extend above the center line of the drain is;
A. 2 ft.
B. 4 ft.
C. 3 ft.
D. 1-1/2ft.

D. 1-1/2ft.

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A basin d to be installed in the center of the room. The individual vent first rises above the flood level rim of the fixture, drops down through the floor, crosses to a partition wall, rises therein and finally ties into a vent stack three feet above the floor immediately above. At the low point of this branch vent the plumbing contractor must:
A. Set a drain cock of the plug type.
B. Provide a gravity drip connection to the soil or waste pipe.
C. Provide an approved air eliminator.
D. Provide a high level float trap to rid this branch vent of any condensate.

B. Provide a gravity drip connection to the soil or waste pipe.

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17. A privy vault is equivalent to a:
A. Water closet.
B. Building house sewer.
C. Private house sewer.
D. Building house drain.

A. Water closet.

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Upon installation it is found that a drain line is much larger than need be for the connected fixture load. The probable result, in operation, of this condition would be:
A. increase the efficiency of this drain.
B. Increase the overall scouring action in this drain.
C. Decrease the overall scouring action in this drain.
D. Air bound the drain.

C. Decrease the overall scouring action in this drain.

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19. Proper venting eliminates most causes of the loss of trap seals. One method of the trap seal loss that venting has no bearing on is:
A. Momentum.
B. Evaporation.
C. Back pressure.
D. Self-siphonage.

B. Evaporation.

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20. Soil and waste stack are being installed in a 25-story building.Yoke relief vents should be provided:
A. 12th  and 20th floors.
B. 5th and 15th floors.
C. 8th and 19th floors.
D. 10th and 20th floors.

B. 5th and 15th floors.

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21. A branch vent that serves two or more traps and extends from in front of the lat fixture connection of a horizontal branch to the vent stack is:
A . Loop vent. 
B. Circuit vent.
C. Relief vent.
D. Continuous vent.

B. Circuit vent.

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22. A centrifugal pump operates at best advantage when set:
A. 32 ft. above water line. 
B. 20ft. above water inlet.
C. 10 ft. above water inlet.
D. 10 ft. below water line.

D. 10 ft. below water line.

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23. If a set of sanitary planes are drawn to scale of 3/4 inch = 1 foot, the plans can be said to be:
A. 1/16 size.
B. 1/8 size.
C. 3/8 size.
D. 3/16 size.

A. 1/16 size.

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24. Even if entire vent system were perfectly installed, a fixture trap can till lose its seal. The normal reason for such occurrence is most likely:
A. Evaporation.
B. Back-pressure.
C. Siphonage.
D. Capillary action.

D. Capillary action.

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``` 25. The symbol for a valve shown on the figure #10 best describes: A. Flanged check valve. B. Screwed union. C. Flanged gate valve. D. Bell and spigot reducer. ```

A. Flanged check valve.

``` 26. A fresh-air-inlet plate was supplied with sixty-three (63) 1/2-inch holes. The maximum size of fresh-air-inlet pipe is most nearly: A. 3 in. B. 4 in. C. 6 in. D. 5 in. ```

``` A. 3 in. .5x.5=.25 .25x63=15.75 3x3=9 4x4=16>15.75 ```

``` 27. When a fixture trap is set greater than two feet away from its vent connection, the trap may lose water seal due to: A. Back pressure. B. Evaporation. C. Momentum. D. Self-siphonage. ```

D. Self-siphonage.

``` 28. The mixture of wiping solder is: A. 30-60. B. 40-60. C. 60-40. D. 70-30. ```

B. 40-60.

``` 29. The length of threaded engagement for two inch pipe is most nearly: A. 3/8 inch. B. 5/8 inch. C. 7/8 inch. D. 1-1/2 inch. ```

C. 7/8 inch.

``` 30. The threads per inch on a 1-1/2 inch pipe: A. 8. B. 11-1/2. C. 14. D. 18. ```

B. 11-1/2.

``` 31. The proper reading of the tee fitting on figure #11: A. 1-1/2"x1"x1-1/2". B. 1-1/2"x1-1/2"x1". C. 1"x1-1/2". D. 1-1/2"x1"x1". ```

A. 1-1/2"x1"x1-1/2".

``` 32. W.O.G. on a valve refers to: A. Steam working pressure. B. Water working pressure. C. Water, oil and gas. D. Female Std. pipe size. ```

C. Water, oil and gas.

``` 33. Minimum size vent penetration through roof: A. 2 inch. B. 2-1/2 inch. C. 3 inch. D. 4 inch. ```

D. 4 inch.

``` 34. A flushometer valve to a water closet, the centerline on the vacuum breaker shall be a minimum length above top of fixture supplied: A. 1". B. 2". C. 4". D. 6". ```

D. 6".

``` 35. Dimension "A" on the figure #12 is: A. 40inches. B. 28 inches. C. 23 inches. D. 20 inches. ```

C. 23 inches. | T=Ox1.15=20x1.15=23.

``` 36. The valve with the greatest resistance to flow: A. Globe. B. Swing check. C. Angle. D. Gate. ```

A. Globe.

``` 37. Screwed drainage fittings have a shoulder, the I..D. of the shoulder is equal to: A. I.D. of schedule 40 pipe. B. I.D. of schedule 80 pipe. C. I.D. of schedule 120 pipe. D. I.D. of C.I. drainage piping. ```

A. I.D. of schedule 40 pipe.

``` 38. Flushometer with a clogged by-pass will cause the valve: A. Not to open. B. Not to close. C. Flush to shot. D. To open but not let water pass. ```

B. Not to close.

``` 39. Fitting with male and female threads is: A. Shoulder nipple. B. Tank nipple. C. Reducing coupling. D. Street ell. ```

D. Street ell.

``` 40. 4 - 1/8 bends and 6 -1/4 bends have a total offset equal to: A. 360* . B. 450*. C. 540*. D. 720*. ```

D. 720*.

``` 41. A nipple a taper thread and straight locknut thread is: A. Tank nipple. B. Close nipple. C. Shoulder nipple. D. Radiator nipple. ```

A. Tank nipple.

``` 42. To thread a stub from a tank, we could only thread only a portion of pipe, if we revers the dye we would: A. Strip the thread. B. Cross thread. C. Lengthen the thread. D. Made L.H. thread. ```

C. Lengthen the thread.

``` 43. A spring tube bender is for: A. Soft copper or aluminum. B. "K" copper. C. "L" copper. D. Stainless steel. ```

A. Soft copper or aluminum.

``` 44. An effective tool to cut 3-inch copper below the floor: A. Tin snips. B. Internal tube cutter. C. Cape chisel. D. Acetylene torch cutter. ```

B. Internal tube cutter.

``` 45. A faucet leaks around the stem requires replacing: A. Bonnet. B. Washer. Cf. Seat. D. Packing. ```

D. Packing.

``` 46. A 4-inch lead bend connection to 4-inch T-wye the adapter used: A. Brass ferrule. B. Double hub. C. Solder nipple. D. Brass flange. ```

A. Brass ferrule.

``` 47. The maximum interval supports for two inch copper tubing: A. 6 ft. B. 8 ft. C. 10 ft. D. 12 ft. ```

C. 10 ft.

``` 48. A drawing is drawn to 1/4-inch per foot. A line on the drawing 14-3/8 inch is most nearly equal to: A. 14 ft. B. 47 ft. C. 57 ft. D. 115 ft. ```

C. 57 ft.

``` 49. The symbol shown on figure #13 is: A. Screw check valve. B. Cast iron backwater valve. C. Bell & spigot C.O. plug. D. Screw reducer. ```

D. Screw reducer.

50. A six inch 125 lb. standard iron companion flange, has how many holes: A, B, C or D. See figure #14.

C. 8 holes.

``` 51. The maximum number of fixture units permitted on an 1-1/2 inch branch vent pipe of 30 feet when the waste branch is 3 inches is most nearly: A. 25. B. 20. C. 15. D. 10. ```

B. 20.

``` 52. A branch vent has 60 fixture units connected to it and a developed length of 120 feet connected to the vent stack; the size of the waste branch is 4 inch, What is the size of the branch vent is: A. 4 inch. B. 3-1/2 inch. C. 3 inch. D. 2-1/2 inch. ```

C. 3 inch.

``` 53. A vent stack that has 250 fixture units connected to it, a developed length of 250 feet with a 4 inch soil stack, it will require a minimum size vent stack of: A. 3 inch. B. 4 inch. C. 5 inch. D. 6 inch. ```

B. 4 inch.

``` 54. A 3" soil branch, has a branch vent which has 42 fixture units connected to it, a developed length of 100 feet of vent pipe is to connect to a vent stack that has a 4 inch companion soil stack, the total length of the vent stack is 100 feet, what is the minimum diameter of the vent stack: A. 5 feet. B. 4 inch. C. 3 inch. D. 2-1/2 inch. ```

C. 3 inch.

``` 55. The maximum number of fixture units permitted on a 2-inch branch vent of 86 feet developed length with a 3 inch soil branch is: A. 53. B. 102. C. 21. D. 10. ```

B. 102.

``` 56. The protection of trap seals from siphonage or back pressure shall be accomplished by the use of properly installed vents, so that at no time shall the trap seal be subjected to a pressure differential of more than : A. 1-inch of water column. B. 2-inch of water column. C. 3-inch of water column. D. 4-inch of water column. ```

A. 1-inch of water column.

``` 57. According to the new plumbing code local law 99-2005 of the international Plumbing Code of 2003 as amended by New York City , when soil, waste or vent pipe are extended through the roof, they shall have a minimum diameter of: A. 4". B. 5". C. 6". D. 3". ```

A. 4".

58. A vent stack is installed in such a manner that it does not receive the wash of the adjoining wast stack. Which regard to this , it can be said that: A. It is illegal and not permitted. B. It is legal and permitted. C. The new code LL 99/2005 makes no mention of this situation. D. The new code mentions the situation but requires a ruling each time.

A. It is illegal and not permitted.

59. The one statement is nearly correct when a roof is used for other than weather protection is the roof vent extension shall terminate: A. 3 feet above the roof within 8 feet of the window. B. 4 feet above the roof unless roof is pitched at an angle of 30* or greater from the horizontal. C. 2 feet above the roof unless roof is pitched at an angle of 30* or less from the horizontal. D. 7 feet above the roof when the roof is flat.

D. 7 feet above the roof when the roof is flat.

``` 60. Suds pressure zone shall be considered to exist when the soil or waste stack serves fixtures that receive wastes containing sudsy detergents on: A. 4 or more floors. B. 3 or more floors. C. 2 or more floors. D. Any floor. ```

C. 2 or more floors.

61. A horizontal branch vent line should: A. Be pitched downward toward the vent stack. B. Be pitched downward toward the branch waste or branch soil line being vented. C. Not pitched at all. D. Be graded up from the branch waste or branch soil line being vented and then tied into the vent stack at the same elevation as the runoff of the trap of the branch waste or branch soil line.

B. Be pitched downward toward the branch waste or branch soil line being vented.

62. In a given installation a 3-inch cast iron wast stack is to be extended through a sun deck. The extension shall be at least: A. 3-inch diameter and 2'-0" above the roof. B. 4-inch diameter and 2'-0" above the roof. C. 3-inch diameter and 7'-0" above the roof. D. 4-inch diameter and 7'-0" above the roof.

D. 4-inch diameter and 7'-0" above the roof.

63. The size of each suds relief vent shall be at least: A. 3/4 the diameter of the piping, but not less than 2-inches. B. 3/4 the diameter of the piping, but not less than 1-1/2-inches. C. 1/2 the diameter of the piping, but not less than 1-1/2-inches. D. 1/2 the diameter of the piping, but not less than 2-inches.

A. 3/4 the diameter of the piping, but not less than 2-inches.

64. In the horizontal drain at the base of a soil stack a suds pressure zone shall be considered to exist in the horizontal (downstream) portion within: A. 10 stack diameters of the base fitting. B. 20 stack diameters of the base fitting. C. 30 stack diameters of the base fitting. D. 40 stack diameters of the base fitting.

A. 10 stack diameters of the base fitting.

``` 65. An offset in a 4-inch waste stack is to be provided with a relief vent. The minimum size relief vent for this stack is: A. 2.in. B. 1-1/2in. C. 3 in. D. 2-1/2 in. ```

A. 2.in.

``` 66. With respect with fixture traps which are individually vented or circuit vented it can be said that these type of vents protect the seal of the trap against: A. Capillary attraction and evaporation. B. Momentum and evaporation. C. Siphonage and back pressure. D. Back siphonage and back pressure. ```

C. Siphonage and back pressure.

``` 67. A roof terminal of a vent pipe is 8 feet from a window on an adjacent building.The top of this window is 5 feet above the elevation lf this vent pipe above the roof shall be (roof used for weather protection only): A. 7 ft. B. 8 ft. C. 3 ft. D. 2 ft. ```

B. 8 ft.

``` 68. A completed soil stack in a new installation is to be subjected to a water test. The roof (other than weather protection and flat) is 55 feet above the test tee at the base of the stack and from which point it is being tested With this stack full of water, the pressure in pounds per square inch, at the top of the test tee is most nearly: A. 25. B. 24. C. 27. D. 26. ```

C. 27. 55'+7'=62' 62x.433=26,848

``` 69. When installing the vent piping for all fixtures on a given stack one should be careful that the branch vent pipes are so graded as to drip back by gravity to: A. The vent stack. B. Outside a suds pressure zone. C. A local vent stack. D. A soil or waste stack. ```

D. A soil or waste stack.

70. A connection between a vent pipe and a vent stack shall be made at least 6 inches above the: A. Trap weir level of the highest fixture served. B. Overflow level rim of the highest fixture served. C. Flood level rim of the highest fixture served. D. Water supply level of the highest fixture served.

C. Flood level rim of the highest fixture served.

``` 71. A common vent may serve as an individual vent for not more than: A. Two fixture drains. B. Three fixture drains. C. Three fixture traps. D. Two fixture traps. ```

D. Two fixture traps.

``` 72. An 8 inch stack is to make an offset. When required, the minimum size relief vent for this stack offset is at least: A. 5 in. B. 4 in. C. 3 in. D. 2 in. ```

B. 4 in.

73. Which one of the following statements is most nearly correct: A. When the roof terminal of any vent, soil or waste pipe within ten feet of any door, window, scuttle or air shaft, such as roof terminal shall extend at least five feet above such opening. B. The vent opening from the soil or waste pipe, except for water closets and similar fixtures shall be above the weir of the trap. C. The maximum distance that a branch vent shall be from a floor drain trap is fifteen feet. D. Main vents or vent stacks shall connect at their base to the main soil or waste pipe at least three feet below the lowest waste branch.

B. The vent opening from the soil or waste pipe, except for water closets and similar fixtures shall be above the weir of the trap.

``` 74. No branch vent will be required when the distance from a floor drain trap to a vented line is not more than: A. 2'-0". B. 12'-0". C. 15'-0". D. 10'-0". ```

C. 15'-0".

``` 75. A relief vent shall be provided at the top of the vertical offset between horizontal portions of the building (house) drain when the vertical rise exceeds: A. 15'. B. 10'. C. 8'. D. 6'. ```

B. 10'.

``` 76. Soil and waste stacks shall be provided with a yoke relief vent in buildings having more than: A. 10 branch intervals. B. 8 Branch intervals. C. 12 Branch intervals. D. 7 Branch intervals. ```

A. 10 branch intervals.

``` 77. Which type of fixture does not create a suds pressure zone at the base of the stack: A. Laundry washing machine. B. Dishwashing machine. C. Kitchen sink. D. Bathtub. ```

B. Dishwashing machine.

78. In an installation of a given plumbing system you find that the plumbing contractor has connected the vent stack to the soil stack at the point just below the lowest drainage connection being served by these stacks.These stacks are connected: A. Not in exact accordance with the reference standards. B. Not in exact accordance with the reference standard but need not be changed. C. Acceptable. D. Not good plumbing practice, although keeping with the R.S.

C. Acceptable.

``` 79. A vent terminal is within seven feet of an operable window which extends two feet above the roof. When the roof is used only for weather protection, the vent terminal height above the roof should be at least: A. 4 ft. B. 9 ft. C. 7 ft. D. 5 ft. ```

D. 5 ft.

80. The reason why a 3/4 "S" traps are not used: A. They cannot be vented properly. B. They are difficult to install. C. They are prohibited by the reference standard. D. They are difficult to replace.

A. They cannot be vented properly.

``` 81. The least likely location to find a "combination waste and vent system" is: A. Repair garage. B. Multiple dwelling. C. High school. D. Supermarket. ```

B. Multiple dwelling.

``` 82. Where a fixture discharges directly into a soil or waste stack at a level above all other drain connections thereto, the stack vent may serve as the vent for the fixture trap provided that such vent connection is within: A. 18 in. B. 24 in. C. 36 in. D. 48 in. ```

D. 48 in.

``` 83. A stack is being tested in its entirety from the roof terminal to a test tee at the base.The roof is used for other than weather protection and is flat, is 62 feet above the test tee. With the stack full of water the pressure at the test tee is most nearly: A. 28.6 psi. B. 29.9 psi. C. 26.8 psi. D. 27.8 psi. ```

B. 29.9 psi. | 62j"+7"=69'x.433=29.877 psi.

84. Which one of the following statements is correct: A. The size of the yoke relief vent shall be equal to the size of the vent stack to which is connected. B. The size of the yoke relief vent shall be equal to the size of the soil or wast stack to which is connects. C. The size of the yoke relief vent shall be equal to the size of the larger stack to which it connects. D. The size of the yoke relief vent shall be equal to the size of the smaller stack to which it connects.

A. The size of the yoke relief vent shall be equal to the size of the vent stack to which is connected.

85. In a soil stack suds pressure zone shall be considered to exist in the horizontal portion within: A. 10 stack diameters of the base fitting. .B. 20 stack diameters of the base fitting. C. 30 stack diameters of the base fitting. D. 40 stack diameters of the base fitting.

A. 10 stack diameters of the base fitting.

``` 86. The vent pipe opening from a soil or waste pipe. except for water closets and similar fixtures, shall not be below the trap: A. Crown. B. Weir. C. Dip. D. Seal. ```

B. Weir.

87. A suds pressure zone is considered to exist in a waste stack. When a 90* offset is made in the waste stack.The suds pressure zone shall exist in the vertical portion within : A. 10 stack diameters of the offset base fitting. B. 20 stack diameters of the offset base fitting. C. 30 stack diameters of the offset base fitting. D. 40 stack diameters of the offset base fitting.

D. 40 stack diameters of the offset base fitting.

88. The maximum distance between the branch vent and a 2 inch fixture trap weir is: A. The maximum distance between the branch vent and a 2 inch fixture trap weir is: A. 48 in. B. 36 in. C. 24 in. D. 18 in.

A. 48 in.

89. Where a 60* and 90* fitting is installed in the horizontal drain, a suds pressure zone shall be considered to exist in the horizontal portion within: A. 10 drain diameters upstream and 40 drain diameters downstream of the fitting. 10 drain diameters upstream and 40 drain diameters downstream of the fitting.C. 10 drain diameters upstream and 10 drain diameters downstream of the fitting. D. 40 drain diameters upstream and 40 drain diameters downstream of the fitting.

10 drain diameters upstream and 40 drain diameters downstream of the fitting.

90. You completed a job on an apartment house and it is reported that one of the stacks, when a water closet on the top floor is flushed, one of the fixture traps on the first story loses it seal. The most probable reason is: A. The main vent stack is to small. B, Trap seal of the fixture is undersized. C. Main vent is connected to the soil stack 2'-6" above the lowest fixture. D. Re-vent is obstructed.

D. Re-vent is obstructed.

91. An alteration involving the installation of several water closets, urinals, and basins is being made in a remote section of a large building, the main vent for these fixture is terminated on the upper floor through the wall. This arrangement is: A. Acceptable as a considerable cost for piping material. B. Not acceptable as this piping arrangement is contrary to the plumbing code. C. Acceptable as the stack cannot be closed due to hoarfrost. D. Not acceptable as the stack cannot be closed due to hoarfrost.

B. Not acceptable as this piping arrangement is contrary to the plumbing code.

``` 92. The maximum distance between the vent branch and a 2 inch fixture trap weir is: A. 48 in. B. 36 in. C. 24 in. D. 18 in. ```

A. 48 in.

``` 93. The primary difference between a schedule 40 pipe and a schedule 80 pipe, of the same material and size, is that the schedule 80 pipe is: A. Weights more per liner foot. B. Has a larger inside diameter. C. Has fewer threads per inch. D. Has a thinner wall thickness. ```

C. Has fewer threads per inch. | A. Weights more per liner foot.

``` 94. The maximum number of branch intervals connected to a soil or waste stack before a vent stack is required to be installed is: A. 4. B. 2. C. 1. D. 3. ```

B. 2.

95. Name at least 15 different types of vents permitted in New York City?

1. Individual. 2. Continuous. 3. Common. 4. Circuit. 5. Loop. 6. Branch. 7. Crown. 8. Relief. 9. Wet. 10. Yoke. 11. F.A.I. 12. Suds zone relief. 13. Stack. 14. Vent stack. 15. Revent.

96. The accepted method for sizing of the vent pipes is: A. To install vents as the same size as the fixture outlets. B. To install vents 1/2 the diameter of the waste pipe. C. Use a mathematic formula. D. To use tables developed by governmental authorities.

D. To use tables developed by governmental authorities.

97. The best type of vent systems to use is: A. A wet type. B. A circuit system. C. A combination wet vent and yoke vent system. D. Every trap to be vented, to properly sized venting system.

D. Every trap to be vented, to properly sized venting system.

``` 98. Which one of these fixtures would lose their trap seal by capillary attraction: A. Sink. B. Urinal. C. Drinking fountain. D. Laundry tray. ```

D. Laundry tray.

99. The best rule to follow to avoid fouling of vent piping as to: A. To provide clean outs on vent lines. B. Always oversize vent pipe. C. Never to use the vent as a waste or waste as a vent. D. Install vents so that they occasionally receive the overflows of wastes.

C. Never to use the vent as a waste or waste as a vent.

``` 100. The greatest thread to our potable water supply system is: A. Lack of reservoirs. B. Increasing demand. C. Pollution. D. Evaporation. ```

C. Pollution.

``` 101. Unit vents are usually used to vent fixtures: A. Isolated or individual designed. B. In every venting designed system. C. Water closet installation. D. Fixtures installed back to back. ```

D. Fixtures installed back to back.

``` 102. Which of the following methods of purifying water is not considered completely satisfactory: A. Calcium and magnesium removal. B. Aeration. C. Sand filtration. D. Precipitation. ```

A. Calcium and magnesium removal.

103. A local vent: A. Should be connected to the main vent. B. Can be used instead of a relief vent. C. Is not connected to the sanitary vent system. D. Vent fixtures isolated from main fixture groups.

C. Is not connected to the sanitary vent system.

104. Water seal trap is effective only when; A. There is danger of frost. B. Atmospheric pressure remains constant over area of seal. C. There is a steady source of water supply available. D. It is installed at sea level.

B. Atmospheric pressure remains constant over area of seal.

105. Traps that rely on mechanical operation to prevent passage of gasses are: A. The best designed type traps to use for all occasions. B. Not to be relied on. C. As good as any other type of traps. D. The most widely used type of traps.

B. Not to be relied on.

``` 106. Which of the following is not a common cause of loss of trap seal: A. Wind effect. B. Evaporation. C. Back pressure. D. Siphonage. ```

A. Wind effect.

107. Shower trap, vent and waste pipe size are: A. 1-1/2" trap, 1-1/2" vent, 1-1/2" waste. B. 1-1/2" trap, 1-1/2" vent, 2" waste. C. 2" trap, 1-1/2" vent, 2" waste. D. 3" trap, 1-1/2" vent, 3" waste.

C. 2" trap, 1-1/2" vent, 2" waste.

``` 108. The house drain is 240 feet long, at the house trap the elevation is -3.5" and at the far end elevations equal to +1.5', the pitch on the house drain is: A. 1/8" per /ft. B. 1.4" per ft. C. 3/8 per ft. D. 1/2 per ft. ```

B. 1.4" per ft. | (1.5x12+3.5)/240=1/4"

``` 109. The water inlet to a suction tank or roof tank shall be controlled by a: A. Gate valve. B. Globe valve. C. Ball cock. D. Needle valve. ```

C. Ball cock.

``` 110. The water supply to a suction tank or roof tank;the inlet shall be terminated so as to provide an accepted air gap but in no case shall it be less than: A. 1 in. below the top of the overflow. B. 2 in. below the top of the overflow. C. 3 in. below the top of the overflow. D. 4 in. below the top of the overflow. ```

D. 4 in. below the top of the overflow.

``` 111. A centrifugal pump with a 4 inch suction and a 3 inch discharge, velocity in the discharge pipe id most nearly equal to: A. 1//2 suction pipe velocity. B. 3/4 suction pipe velocity. C. 2 times suction velocity. D. 3 times suction velocity. ```

C. 2 times suction velocity.

``` 112. To connect spigot end of a 6" clay pipe to the bell end of cast a iron pipe,you must use a: A. Double hub. B. Increaser. C. Reducing hub. D. Sleeve. ```

B. Increaser.

``` 113. To measure the pressure of natural gas, you must use a: A. Altimeter. B. Meter bar. C. Hydrometer. D. Manometer. ```

D. Manometer.

``` 114. An eccentric reducer is used to deep: A. Same centerline. B. Same inside bottom. C. To lower the invert. D. Reduce velocity. ```

B. Same inside bottom.

115. Water-hammer arrester is required on flush valves for W.C. and urinals: A. Having a minimum length of 12 inches. B. A water hammer arrestor, installed as to the manufacturer specification. C. Having a minimum length of 18 inches. D. Having a minimum length of 24 inches.

B. A water hammer arrestor, installed as to the manufacturer specification.

116. Using an air hose to remove metal chips is: A. Recommended when less than 30 psi is used. B. Not recommended. C. Recommended when you use safety glasses. D. Recommended.

B. Not recommended.

``` 117. A common vent is also known as a: A. Crown vent. B. Dual vent. C. Side vent. D. Yoke vent. ```

B. Dual vent.

``` 118. A 4-inch drain pipe fitting not allowed for a 90* stack offset: A. Combination wye and 1/8 bend. B. Long sweep. C. 1/4 bend. D. Y and 1/8 bend. ```

C. 1/4 bend.

119. Vertical cast iron pipe is supported at its base and: A. Each story height, but in no case at intervals greater than 12 ft. B. Each story height, but in no case at intervals greater than 20 ft. C. Every other story, maximum 20 ft. D. . Every other story, maximum 25 ft.

B. Each story height, but in no case at intervals greater than 20 ft.

``` 120. A centrifugal pump with a pet cock at the top of the housing is for: A. Check first stage pressure. B. Check second stage pressure. C. Bleed air. D. Drain impeller for repair. ```

C. Bleed air.

``` 121. A hospital fixture that does not require a vapor vent: A. Pressure sterilizer. B. Clinical sink. C. Bed pan washer. D. Autoclave. ```

B. Clinical sink.

``` 122. A pump that has a connections water discharge has a fixture unit value that is equal to: A. Trap size. B. One f.u. per/g/m. C. Two f.u. per/g/m. D. Two f.u. per inch drain diameter. ```

C. Two f.u. per/g/m.

``` 123. A gas pipe branch of a riser requires: A. One elbow swing. B. With no less than one elbow swing. C. Gasket union. D. With no less than a two-elbow swing. ```

D. With no less than a two-elbow swing.

``` 124. The size of a lavatory outlet shall be at least: A. 1-1/4". B. 1-1/2". C. 2". D. 3". ```

A. 1-1/4".

``` 125. The type of materials used for oxygen pipe lines: A. Galv. steel. B. Black steel. C. "M" copper. D. "K". ```

D. "K".

``` 126. A grease interceptor that receives 10 g/p/m of waste water shall have a grease retention of: A. 5 pound. B. 10 pound C. 15 pound. D. 20 pound. ```

D. 20 pound.

``` 127. Oil separators shall have a depth of not less than: A. 6 inches. B. 12 inches. C. 18 inches. D. 24 inches. ```

D. 24 inches.

``` 128. The outlet opening of an oil separator shall have not less that an: A. 12" water seal. B. 18" water seal. C. 24" water seal. D. 30" water seal. ```

B. 18" water seal.

``` 129. Where automobiles are serviced oil separators shall have a min. capacity of: A. 2 cubic ft. B. 4 cubic ft. C. 6 cubic ft. D, 8 cubic ft. ```

C. 6 cubic ft.

``` 130. Maximum flow rate and consumption for public lavatory (metering) or fixture fitting: A. 2.2 GPM at 60 PSI. B. 0.25 gallon per metering cycle. C. 0.2 GPM at 60 PSI. D. 2.5 GPM at 80 PSI. ```

B. 0.25 gallon per metering cycle.

``` 131. Maximum flow rate and consumption for a public lavatory (other than metering): A. 2.2 GPM at 60 PSI B. 0.25 gallon per metering cycle. C. 0.5 GPM at 60 PSI. D. 2.5 GPM at 60 PSI. ```

C. 0.5 GPM at 60 PSI.

``` 132. Maximum flow rate and consumption for a shower head: A. 2.2 GPM at 60 PSI. B. 0.25 gallon per metering cycle. C. 0.5 GPM at 60 PSI D. 2.5 GPM at 80 PSI. ```

D. 2.5 GPM at 80 PSI.

``` 133. Maximum flow rate and consumption or a sink faucet: A. 2.2 GPM at 60 PSI. B. 1.0 gallon per flushing cycle. C. 1.6 gallon per flushing cycle. D. 3.5 gallon per flushing cycle ```

A. 2.2 GPM at 60 PSI.

``` 134. Maximum flow rate and consumption for a urinal: /A. 2,2 GPM at 60 PSI. B. 1.0 gallon per flushing cycle. C. 1.6 gallon per flushing cycle. D. 3.5 gallon per flushing cycle. ```

B. 1.0 gallon per flushing cycle.

``` 135. Maximum flow rate and consumption for water closet (other than metering): A. 2.2 GPM at 60 PSI. B. 1.0 GPM at 60 PSI. C.1.6 gallon per flushing cycle D.3.5 gallon per flushing cycle ```

C.1.6 gallon per flushing cycle.

136. The maximum water consumption rate quantities for plumbing fixtures and fixture fittings shall be in accordance with table 604.4.The one fixture that is not an exception: A. Blowout design water closets (3.5 gallons) per flushing cycle. B. Vegetables sprays, service sinks, emergency showers. C. Clinical sinks (4.5 gallons per flushing cycle). D. Water closet (1.6 gallons per flushing cycle).

D. Water closet (1.6 gallons per flushing cycle).

137. Where street main pressures fluctuate, the building water distribution system shall be designed for the: A. Minimum pressure available. B. Maximum pressure available. C. Existing pressure available. D. Engineers availability of he pressure.

A. Minimum pressure available.

138. Where pressure from the street main or other source of supply is insufficient to provide flow pressure at fixture outlets as required under table 604.3 you need: A. To know the maximum pressure available. B. A water pressure booster system. C. To know the minimum pressure available. D. The type of fixture to be installed.

B. A water pressure booster system.

``` 139. An approved water pressure reducing valve conforming to ASSE 1003 with strainer shall be installed to reduce the pressure in building water distribution piping whenever the water pressure within a building exceeds: A. 40 PSI static. B. 65 PSI. C. 75 PSI. D. 85 PSI. ```

D. 85 PSI.

140. The pressure reducing valve shall be designed to: A. Remain open to permit uninterrupted water flow in case of valve failure. B. Remain closed to permit uninterrupted water flow in case of valve failure. C. Alarm when valve fails. D. Close when pressure exceed 85 PSI.

A. Remain open to permit uninterrupted water flow in case of valve failure.

``` 141. All water-pressure reducing valves, regulators and strainers shall be so constructed and installed as to permit repair of removal of parts without breaking a pipeline or removing the valve: A. Vacuum breaker from the pipeline. B. Strainer from the pipeline. C. Check line from the pipeline. D. Parts from the pipeline. ```

B. Strainer from the pipeline.

``` 142. The flow velocity of the water distribution system shall be controlled to reduce the possibility of: A. Wear and tear. B. Noise. C. Water hammer. D. Surging. ```

C. Water hammer.

143. Water hammer arrestors shall conform to ASSE 1010 and PDI WH201 and shall be installed: A. Concealed areas. B. Behind partitions. C. Accordance with manufacturer's specification. D. Well ventilated areas.

C. Accordance with manufacturer's specification.

``` 144. Hot and cold water manifolds shall be sized with Table 604.10.1 The total gallons per minute is the demand of all outlet supplied; so a 1/2 inch nominal size pipe that produces a velocity of water flow at 8 feet per second will generate a maximum demand of: A. 2 GPM. B. 3 GPM. C. 5 GPM. D. 11 GPM. ```

C. 5 GPM.

``` 145. Individual fixture shutoff valves installed at the manifold shall: A. Be identified. B. Be a globe valve. C. Need valves. D. Check valves. ```

A. Be identified.

146. Water service pipe shall conform to NSF61 and shall conform to one of the standards listed in Table 605.3. The one material not approved: A. Brass pipe ASTM B43. B. Copper or copper-alloy tubing (type K). C. Ductile iron water pipe (cement mortal line). D. Galvanized steel.

D. Galvanized steel.

147. Water distribution pipe shall conform to NSF61 and shall conform to one of the standard listed in table 605.4.The one material not approved: A. Stainless steel pipe (type 304/304I), B. A. Stainless steel pipe (type 304/304L), C. Plastic pipe. D. Copper and copper-alloy pipe.

C. Plastic pipe.

``` 148. Mechanically formed tee fitting, the mechanically extracted outlets shall have a height not less than ... times the thickness of the branch tube wall: A. One. B. Two. C. Three. D. Four. ```

C. Three.

149. In the mechanically formed tee fittings, a full flow assurance is required and branch tube shall not restrict the flow in the run tub: A. A dimple/depth stop shall be formed in the branch tube to ensure that penetration into the collar is of the correct depth. B. For inspection purposes, a second dimple shall be placed 0.25 inch above the first dimple. C. Dimples shall be aligned with the tube. D. A,B & C.

D. A,B & C.

``` 150. Mechanically formed tee fitting shall be: A. 95-5 soldered joints. B. 50-50 soldered joints. C. Brazed joints. D. Compression joints. ```

C. Brazed joints.

``` 151. Flexible water connectors exposed to continuous pressure shall conform to IAPMO PS 7495 and PAS 4892 shall not exceed: A. 18". B. 24". C. 30". D. 36". ```

B. 24".

152. The following types of joints and connections shall be prohibited: A. Cement or concrete joints. B. Solvent cement joints between different types of plastics. C. Saddle-type fittings. D. A, B & C.

D. A, B & C.

``` 153. Joints between brass pipe or fitting shall be: A. Welded. B. Brazed. C. Soft solder 95-5. D. Compression fittings. ```

B. Brazed.

``` 154. Threaded joints shall conform to ASME B1.20 pipe-joint compound or tape shall be applied on the: A. Male treads only. B. Male treads sometimes. C. Female threads. D. B &C. ```

A. Male treads only.

155. Solder joints shall be made in accordance with the methods of ASTM B828. All cut tube ends: A. Shall be reamed to the full size inside diameter of the tube end. B. Shall be reamed to the full size outside diameter of the tube end. C. Shall be reamed to remove only burrs. D. Does not need to be reamed.

A. Shall be reamed to the full size inside diameter of the tube end.

``` 156. The joining of water supply piping shall made with lead free solder and fluxes "lead free" mean a chemical composition equal to or less than ... percent lead: A. 0.1 B. 0.2 C. 0.3 D. 0.4. ```

B. 0.2

157. All welded joint surfaces shall be cleaned. The joint shall be welded: A. Autogenously. B. With an approved filler metal as referenced in ASTM A 312. C. Using brazed filler metal. D. A & B.

D. A & B.

158. Joints between different piping materials shall be made with a: A. Mechanical joint of compression type. B. Mechanical joint of the mechanical-sealing type. C. Joints shall be installed in accordance with the manufacture's instruction. D. A, B & C.

D. A, B & C.

``` 159. Joints between copper and copper-alloy fitting and galvanized steel. Shall be made with a: A. Brass fitting. B. Dielectric fitting. C. A & B. D. None of the above. ```

C. A & B.

160. Joints between stainless steel and different piping materials shall be made: A. With mechanical joint of the compression type. B. With mechanical sealing type. C. With dielectric fitting. D/ A. B & C.

D/ A. B & C.

161. Full-open shall be installed in the following locations of the building water distribution system on the: A. Building water service pipe from the public water supply near the curb. B. Water distribution supply pipe at the entrance into the structure. C. Discharge side of every water meter. D. A, B & C.

D. A, B & C.

162. Where the water pressure in the public water main or individual water supply is insufficient to supply the minimum pressure and quantities specified by this code, the supply shall be supplemented. The one that is incorrect: A. Elevated water tank. B. Portable emergency generator. C. Hydro-pneumatic pressure booster system. D. Water pressure booster pump.

B. Portable emergency generator.

``` 163. Each gravity or suction water supply shall be provided with: A. Guarantee. B. Locked cover. C. Overflow. D. Emergency bell. ```

C. Overflow.

164. All water supply tanks shall be covered to keep out unauthorized persons, dirt and vermin. The covers of gravity tanks shall be: A. Made of wood. B. Shall be vented with a return bend vent pipe with an of not less than the area of the down-feed riser pipe. C. The vent shall be screened with a corrosion resistant screen of not less than 16 by 20 mesh per inch. D. B & C.

D. B & C.

``` 165. The overflow outlet of a gravity or suction water supply tank shall discharge within ... of a roof or roof drain or over an open water supplied fixture: A. 6". B. 8". C. 10". D. 12". ```

A. 6".

``` 166. Th e overflow discharge of gravity or suction water supply tank shall be proved with durable screening with openings of not less more than: A. 1/16 inch. B. 1/8 inch. C. 1/4 inch. D. 3/8 inch. ```

B. 1/8 inch.

``` 167. Water inlets to gravity house tanks shall be controlled by: A. Gate valve. B. Full bore opening valve. C. Ball cock. D. Check valve. ```

C. Ball cock.

``` 168. The air gap provided for the inlet supply to a gravity house tank shall be terminated so as to provide an accepted air gap but in no case shall be less than ... above the top of the overflow: A. 2". B. 4". C. 6". D. 8". ```

B. 4".

``` 169. The outlet from the gravity tank to the water distribution system shall be equipped with a strainer located at least ... above the tank bottom to prevent solids from entering the piping system: A. 2". B. 4". C. 6". D. 8". ```

A. 2".

``` 170. All down-feed supplies from a tank cross-connected in any manner with distribution supply piping in a building supplied by direct street or pump pressure, shall be equipped with a ... on the main cold water down-supply to prevent backflow of water into the roof tank: A. Check valve. B. Gate valve. C. Alarm valve. D. Double gate and ball valve. ```

A. Check valve.

171. Each house gravity tank, tank compartment shall be provided, at its lowest point, with a valved pipe to permit emptying the tank. The drain pipe shall discharge as required for the overflow pipe, and shall at least ... in diameter. A. 2". B. 3". C. 4". D. 5".

C. 4".

``` 142. Potable water gravity tanks or potable water pressure tanks shall not be located directly under any: A. Roof area. B. Cellar area. C. Soil or waste piping. D. Basement area. ```

C. Soil or waste piping.

173. The garvity house supply tank shall be built of: A. Wood. B. Steel. C. Equivalent materials of approved type. D. A, B & C.

D. A, B & C.

``` 174. Steel gravity house supply tanks shall: A. Not be painted. B. Painted both inside and outside. C. Painted only on the outside. D. Painted only on the inside. ```

B. Painted both inside and outside.

175. If gravity house supply tank with a dividing partition is installed, the total capacity of the combined compartments shall be considered as the: A. Capacity of a single tank for the purpose of determining storage capacities of the tank. B. A. Capacity of a dual tank for the purpose of determining storage capacities of the tank. C. Full amount used for standpipe and sprinkler. D. Full amount used for domestic water and sprinkler.

A. Capacity of a single tank for the purpose of determining storage capacities of the tank.

176. Water tanks shall be cleaned and painted in accordance with the following : A. No water tank of any kind that is part of a building water supply system used for potable purposes shall be cleaned with any material or painted on the inside with any materials that will have a toxic or otherwise objectionable effect on the potability of the water supply when the tank is put into service. B. No lead paint shall be used. C. The water supply connections to and from a tank shall be disconnected or plugged while the tank is being cleaned or painted to prevent any foreign fluid substance from entering the distribution piping. D. A, B & C.

D. A, B & C.

``` 177. Where the air in water supply tank (when cleaning the tank) may be insufficient to sustain human life, or may contain any injurious gas, adequate measures shall be taken: A. To replace the workers. B. For the protection of the workers. C. To add 30% additional oxygen. D. To add 35% additional oxygen ```

B. For the protection of the workers.

``` 178. When cleaning water tanks, after the tank has be changed or painted, it shall be disinfected according to the following procedure before it is put back in service.The underside of the top, the bottom, and the wall shall be washed with a hypochlorite (chlorine) solution containing ... or more parts per million of available chlorine. The tank shall be filled with water to which hypochlorite solution is added the filling in sufficient quantity so that the treated water in the tank will contain at least ... parts per million of available chlorine. The chlorinated water shall be allowed to remain in the tank for ... hours. Finally the tank shall be drained completely before refilling. House and suction tanks shall be drained and cleaned at least ... . A. 100,10,2, once a year. B. . 100,10,2, every 6 months. C. . 10,100,2, every 2 years. D. . 2,100,10, every month. ```

A. 100,10,2, once a year.

``` 179. A low-pressure cutoff shall be installed on all booster pumps in a water pressure booster system to prevent creation of a vacuum of negative pressure on the suction side of the pump when a positive pressure ... or less occurs on the suction side of the pump" A. 7 PSI. B. 10 PSI. C. 11 PSI. D. 12 PSI, ```

B. 10 PSI.

Session 8. Flashcards

(179 cards)