Session 3. Flashcards
1. Two pieces of 1-1/2 inch waste lead was to be joined together. The total thickness of the joint (solder) and lead at its widest is most nearly: A. 1-3/4 in. B. 2-1/4 in. C. 2 in. D. 2-3/4 in ?
D. 2-3/4 in.
1-1/2+ 2x1/8+2x1/8+2x3/8=2-3/4 in
Where 3/8 in. wiping beed thickness.
- The primary purpose for plumbing pipes when passing through an arch, or pipe sleeve, or under a lintel, or through or under walls:
A. To provide accessibility for replacement of the pipes.
B. to protect against corrosion of the pipes.
C. To protect from breakage of the pipes.
D. To provide room for expansion of the pipes?
C. To protect from breakage of the pipes.
- The primary purpose for using protective sheathing or wrapping when passing through concrete, cinder or other similar materials:
A. To withstand any reaction (corrosion) from the lime and acid of the concrete.
B. allow for expansion and contraction.
C. To prevent any rubbing action.
D. A,B &C.
D. A,B &C.
4. The minimum inside diameter of a four (4") inch caulking ferrule is most nearly: A. 4 in. B. 4-1/4 in. C. 4-3/8 in. D. 4-1/2 in?
B. 4-1/4 in.
It fit lead pipe: 4+2x1/8=4-1/4”.
- The one part of a plumbing system where copper or copper alloy tubing (type K,L) is not permitted is:
A. Underground building drainage and vent pipe.
B. above-ground drainage and vent pipe.
C. Building sewer pipe.
D. Chemical wast system.
D. Chemical wast system.
6. The minimum weight percentage of antimony required in a lead alloy water closet floor flange is most nearly: A. 5-5/8%. B. 7-3/4%. C. 11-1/2%. D. 9-3/8%?
B. 7-3/4%.
7. In any borough (except Manhattan), building (house) sewer shall be a minimum size of: A. 4 in. B. 5 in. C. 6 in. D. 8 in.
C. 6 in.
- In a 5-story multiple dwelling, approved plastic piping shall not be installed for:
A. Drainage, above ground.
B. drainage, below ground within buildings.
C. Building house sewers.
D. Indirect waste piping.
C. Building house sewers.
9. Cleanout plugs shall be of brass and have a minimum thickness of at least: A. 1/16 in. B. 1/8 in. C. 3/16 in. D. 1/4 in?
B. 1/8 in.
- It is necessary to install a section of water distribution piping underground. The one material that shall not be used is most nearly:
A. Copper or copper-alloy pipe.
B. copper or copper-alloy tubing (type K,L).
C. Stainless steel pipe (type 304, 304L).
D. Galvanized wrought iron.
D. Galvanized wrought iron.
11. The minimum outside diameter of a 4-inch lead bend is most nearly: A. 4 in. B. 4-1/8 in. C. 4-1/4 in. D. 4-3/4 in?
C. 4-1/4 in.
4+2x1/8=4-1/4”.
- A 1-inch water pipe is to be installed crosswise to wooden joists. The best location to cut the joists is most nearly:
A. More than 1.5 inches from the nearest edge of the member.
B. center of joists, halfway between support.
C. Top of joists, halfway between supports.
D. Bottom middle of joists?
B. center of joists, halfway between support.
- Piping for underground building drainage and vent pipe shall be:
A - F?
A. Cast-iron pipe.
B. copper or copper-alloy tubing (type K, L).
C. Ductile iron.
D. Non-asbestos fiber cement.
E. Polyvinyl chloride (PVC) plastic pipe in IPS diameters.
F. Stainless steel drainage systems.
- Piping for above-ground drainage and vent pipe shall be:
A - L?
A. Acrylonitrile butadiene styrene (ABS) plastic pipe in IPS diameters. B. brass pipe. C. Cast-iron pipe. D. Copper or copper-alloy pipe. E. copper or copper-alloy tubing (type K, L). F. Ductile iron. G. Galvanized steel pipe. H. Glass pipe. I. High silicon cast iron. J. Polyolefin pipe. K. PVC plastic pipe. L. Stainless steel drainage systems.
15. A four (4") inch lead bend that is 30 inches long meeting the minimum requirements, weights most nearly: A. 24 lbs. B. 20 lbs. C. 16 lbs. D. 12 lbs. ?
B. 20 lbs.
weight in pounds = (2x diameter)xLength in feet =
2x4x30/12 = 20 lbs.
16. The minimum depth of cast-iron floor flange shall be most nearly: A. 2-1/2 in. B. 3-1/2 in. C. 3 in. D. 2 in.
D. 2 in.
17. A lead shower pan having the minimum weight requirements is to have its edges welded with ears forming its corners. The minimum thickness of the lead joint is most nearly: A. 1/16 in. B. 1/4 in. C. 1/8 in. D 3/16 in.
D 3/16 in.
18. Lead should not be used as a material for: A. Roof flashing. B. shower base. C. Water piping. D. Caulking.
C. Water piping.
19. A pipe that has a high percentage of sillicon is generally used for: A. Oil separation system. B. Acis waste system. C. Sub-soil drainage. D. Swimming pools?
B. Acis waste system.
- A material that shall not be used for vent puping in a chemical waste system is:
A. Low expansion, borosilicate glass pipe.
B. Extea heavy cast iron soil pipe.
C. Approved plastic pipe.
D. Chemical stoneware pipe?
B. Extea heavy cast iron soil pipe.
21. A shower pan, with ears forming the corners, has the dimensions 30"x30"x3", the minimum weight of sheet copper usednfornthisnpan is most nearly: A. 5-3/4 pounds. B. 4-3/4 pounds. C. 8 pounds. D. 6-1/2 pounds.
C. 8 pounds.
36x36x.75/144=8 lbs.
22. An equivalent discount of 30%,12%, and 5% is most nearly: A. 31.5%. B. 53.0%. C. 41.5%. D. 58.5%?
C. 41.5%.
ED=.7x.88x.95-1.00=0.4148
0.4148x100%=41.5%.
23. A standard screwed malleable fitting arenusually designed to withstand internal pressures of most nearly: A. 100 psi. B. 125 psi. C. 150 psi. D. 250 psi?
C. 150 psi.
24. If a sheet copper pan fitted into a shower that measures 12 square feet, the minimum total weight of the sheet copper, allowed by code, is most nearly: A. 6 lbs. B. 9 lbs. C. 12 lbs. D. 48 lbs?
B. 9 lbs.
12x 75=9 lbs.
25. A sheet lead shower pan is to be used on an altertion job. It is to be 3 square feet and have 4 inch up-stand. The minimum weight when completed and readyfor installation is most nearly: A. 50 lbs. B. 54 lbs. C. 58 lbs. D. 62 lbs?
B. 54 lbs.
44”x44” /144x4 = 52.52 lbs.
26. The USA gauge of flush pipe and fittings when brass or copper tubing is used, most nearly: A. #22. B. #20. C. #24. D. #18.
A. #22.
27. When open trenches are impractical, pipes may be installed by tunneling, jacking or a combination of both and are acceptable to the: A. Commissioner. B. Licensed plumber. C. Owner. D. Prime contractor.
A. Commissioner.
28. Threaded cast-iron drainage fittings shall be most nearly: A. Galvanized and recessed. B. Galvanized but need not be recessed. C. Recessed but need not be galvanized. D. Neither recessed or galvanized.
C. Recessed but need not be galvanized.
29. Cast brass floor flange for water closets or similar fixtures shall be not less then: A. 1/8 inch thick. B. 3/16 inch thick. C. 1/4 inch thick. D. 3/8 inch thick.
A. 1/8 inch thick.
30. Theee shower pans are to be installed on a particular job. They are to be rectangular in shape, 3'-0" x 3'-6", and to have 4" up-stand with the ends "eared over". If sheet lead cost 30 cents per pound, the cost of the three shower pans will be most nearly: A. $18.50. B. $55.00. C. 38.00. D. $46.00.
B. $55.00.
44x50x3/144x4x.3=$55.
- The installation of drainage street fittings are:
A. Permitted with commissioners’ permission.
B. Permitted as it conforms to screwed drainage specifications.
C. Not prrmitted as it restricts the flow.
D. Permitted only where there are space limitations.
B. Permitted as it conforms to screwed drainage specifications.
32. Approved plastic pipe and fittings may be used in residential buildings that have a heightbofbless than: A. 7 stories. B. 6 stories. C. 5 stories. D. 4 stories.
B. 6 stories.
33. The minimum thickness of cast iron or galvanized malleable iron floor flanges is: A. 3/16". B. 3/8". C. 1/4". D. 1/2".
C. 1/4”.
- Trench shall be free from discarded construction material and debris. Loose earth free from rocks, broken concrete and frozen chunks shall be placed in the trench in 6 inch layers and tamped in place untol:
A. 12 inches above the invert of the pipenof tamped earth.
B. 6 inches above the invert of the pipenofntampednearth.
C. 12 inches above the centerline of the pipe of tamped earth.
D. The crown of the pipe is covered byn12 inches of tamped earth.
D. The crown of the pipe is covered byn12 inches of tamped earth.
35. Separate drainage systems for chemical waste shall be of an acidnresistant material, and is notnrequired, when the ph value of the waste is between: A. 4.0 and 9.0. B. 4.5 and 9.6. C. 4.5 and 9.5. D. 4.0 and 9.5.
C. 4.5 and 9.5.
36. Coating pipes with a varnish is most likely to: A. Reduce the heat loss from the pipes. B. Protect against external corrosion. C. Protect against galvanic action. D. Reduce the possibility ofnleaks.
B. Protect against external corrosion.
37. Trenches shall be backfilled of tamped earth for one foot above the crown of the pipe in layers that are in : A. 6 in. B. 4 in. C. 3 in. D. 2 in.
A. 6 in.
38. The minimum weight of six 2-inch caulking ferres, twelwe 3-inch caulking ferrules and ten 4-inch caulking ferrules weighs most nearly: A. 48 lbs. B. 52 lbs. C. 60 lbs. D. 64 lbs.
B. 52 lbs.
6x1+12x1.75+12x2.5 = 52 lbs.
39. Four 2-inch caulking ferrules, two 3-inch caulking ferrules and one 4-inch caulking ferrulenconforming to the minimum requirements of the code shall have a weight of most nearly: A. 10 lbs. B. 12 lbs. C. 8 lbs. D. 18 lbs.
A. 10 lbs.
- A material not permitted to be installed for sub-soil drainage piping:
A. Open-jointed vitrified clay pipe.
B. Asbestos cement pipe that is open jointed or horizontally split.
C. Porous concrete pipe.
D. Stainless steel drainage systems.
B. Asbestos cement pipe that is open jointed or horizontally split.
41.. The one material that shall not be used in water distribution piping systems:
A. Brass pipe ASTM B 43.
B. Stainless steel pipe (Type 304/304L).
C. Copper orncopper-alloy pipe ASTM B 42; ASTM B 302.
D. Galvanized iron pipe ANSI B36.20.
D. Galvanized iron pipe ANSI B36.20.
42. The outside diameter of 2" lead waste pipe is most nearly: A. 2-1/2 in. B. 2-1/4 in. C. 2-1/8 in. D. 2 in.
B. 2-1/4 in.
2+1/8+1/8=2-1/4”.
43. If a sheet lead pan fitted into a shower stall measures 12 sq. ft. , the minimum total weight of this most nearly: A. 24 lbs. B. 36 lbs. C. 48 lbs. D. 60 lbs.
C. 48 lbs.
- The one material not permitted to be used in water service piping in a building under any condition is:
A. Red brass pipe ASTM B 43.
B. copper or copper-alloy tubing (type K);
C. Copper or copper-alloy tubing (Type L).
D. Ductile iron water pipe.
C. Copper or copper-alloy tubing (Type L).
45. Lead bends have the same thickness as sheet lead that has a weight per square foot, of most nearly: A. 4 lb. B. 5 lb. C. 6 lb. D. 8 lb.
D. 8 lb.
- Copper tubing Type K and L may not be used for:
A. Above ground drainage and vent pipe.
B. Underground building drainage and vent pipe.
C. Building sewer pipe.
D. Sub-soil drain pipe.
D. Sub-soil drain pipe.
- Escutcheons orbmetal collars are installed around exposednpipes passing through walls and floors to:
A. To prevent teavel of pests along the pipes.
B. To permit expansion and contraction of the pipes.
C. To improve the appearance of the pipes.
D. To absorb the vibration of pipes.
A. To prevent teavel of pests along the pipes.
- A lundry tub is to be branch vented to the existing vent system. If a 1-1/2 inch lead pipenis to be used for the branch vent:
A. The maximum developed length permitted is 15 ft.
B. The maximum developednlength permitted is 5 ft.
C. The maximum debeloped length permitted is 2 ft.
D. It is notnpermitted.
D. It is notnpermitted.
- The one material that shall notnbe permittednto be used for the installation of underground building storm sewer piping between two catch basins is:
A. High density poluethylene pipe (hdpe).
B. Ductile-iron pipe.
C. Non-asbestos fiber cement pipe.
D. Hard temper “K” copper pipe.
D. Hard temper “K” copper pipe.
- A three-inch diameter cold waterbdistribution pipe is to be installed underground. The one material not approved fornthisbtype ofninstallation is:
A. Stainless steel pipe (type 304/304L).
B. Copper or copper alloy tubing (type L).
C. Copper or copper alloy tubing (type K).
D. Brass pipe (60/40 composition).
D. Brass pipe (60/40 composition).
51. In the installation of a building sewetva permitnfornsidewalknand street openings shall be obtained from the deparent of : A. Buildings. B. Public works. C. Transportation. D. Police.
C. Transportation.
- “Any pipe that passes under a footing or through a foundation wall shall be provided with a relieving arch, or a pipe sleeve, pipe shall be two pipe sizes greater than the pipe passing through the wall.”
The above staent will protect the pipe against:
A. External corrosion.
B. Freezing.
C. Cabe-ins.
D. Breakage.
D. Breakage.
53. The instrument most generally used to obtain the pressure in a natural gas line to gas ranges is most nearly: A. Mercury gauge. B. Manometer. C. Bourdon gauge. D. Pressuretrol.
B. Manometer.
C. Bourdon gauge.
54. A flaw in cast iron enameled plumbing fixtures is a slight depression in the enameled surface. This flaw is defined as a: A. Craze. B. Bubble. C. Dimple. D. Speck.
C. Dimple.
55. There is 160 feetnofnstorm water piping between catch basins. One catch basin is as dat -1.57 ft. , and the slope of rhe storm pipe is 2%. The datum point of the downsteeam catch basin is most nearly: A. -4.90 ft. B. -1.57. C. +1.76. D. -3.33.
A. -4.90 ft. TF = LxG = 160 x .02 = 3.2'. TF = 160x1/4 =40"=3.33'. 1.57+3.2=4.77'. 1.57+3.33=4.9'.
56. In a closet tank excessive water pressure can cause a rupture, but excessive waterbtemperature can cause: A. Scalding. B. "Banging" in the pipes. C. Tank collapsing. D. An explosion.
D. An explosion.
57. Before assembling rigid copper tubing, to be soft soldered, the external surfaces shall be made bright and coated with a solder flux which contains most nearly: A. Tallow. B. Sal ammoniac (Ammonium chloride). C. Rosin. D. Borax.
B. Sal ammoniac (Ammonium
58. If the hand operated shut-off valve in a waterblinenis turned to the fully closed position, and water continues to flow through the valve, the most likely defect you would find is: A. Loose gland. B. Excessive packing. C. Improper seating of the valve disc. D. A loose stuffing nut.
C. Improper seating of the valve disc.
59. An estimate of $6,600 was submitted for a plumbing contract. The plumbers' profit ratio was 20% of costs. What is the plumbers' profit on this wstimate: A. $6,600. B. $5,500. C. $1,100. D. $1,050.
C. $1,100.
6,600/1.2=5,500 5,500x.2=1,100.
- By the “invert” of a horizontal building drain means the:
A. Top of the inside surface of the pipe.
B. Centerline of the inside diameter of the pipe.
C. Lowest portion or the bottom of the inside surface od the pipe.
D. Lowest portion of the outside surface of the pipe.
C. Lowest portion or the bottom of the inside surface od the pipe.
61. A slug waterbcompletely fills the stack. The cause for a fixture below the slug of water to lose its trap seal is: A. Self-siphonage. B. Back-pressure. C. Momentum. D. Aspiration.
B. Back-pressure.
- The best way to prevent a water pocket from forming when two horizontal steam pipes of different diameters are joined is:
A. Use an eccentric fitting.
B. Use a long fitting so that the slope between the pope is verybgradual.
C. Rovide a drain cock.
D. Slope the pipe so that the smaller pipe is lower.
A. Use an eccentric fitting.
- The acceptor’s responsibility - the purpose of commercial standards is to establish for specific commoities, nationally recognized grades or consumer croteria and the benefits there from will be measurable in direct proportion to their general recognition and actial use. Instances will occur when it may be necessary to diviate from the standard and the signing of an acceptance does not preclude such departtures; however, such signature indicates an intention to follow the commercial standard where practical, in the production, distribution, or consumption of the article in question.
The word preclude as used in this paragraph means most nearly:
A. Permit.
B. Allow.
C. Include
D. Prevent.
D. Prevent.
- The acceptor’s responsibility - the purpose of commercial standards is to establish for specific commoities, nationally recognized grades or consumer croteria and the benefits there from will be measurable in direct proportion to their general recognition and actial use. Instances will occur when it may be necessary to diviate from the standard and the signing of an acceptance does not preclude such departtures; however, such signature indicates an intention to follow the commercial standard where practical, in the production, distribution, or consumption of the article in question.
The word intention as used in thisbparagraph means most nearly:
A. Agreement.
B. Impulse.
C. Objection.
D. Obstinate.
A. Agreement.
- The acceptor’s responsibility - the purpose of commercial standards is to establish for specific commoities, nationally recognized grades or consumer croteria and the benefits there from will be measurable in direct proportion to their general recognition and actial use. Instances will occur when it may be necessary to diviate from the standard and the signing of an acceptance does not preclude such departtures; however, such signature indicates an intention to follow the commercial standard where practical, in the production, distribution, or consumption of the article in question.
The word recognized as used in this paragraph means most nearly:
A. Desirable.
B. Stable.
C. Branded.
D. Accepted.
D. Accepted.
- The acceptor’s responsibility - the purpose of commercial standards is to establish for specific commoities, nationally recognized grades or consumer croteria and the benefits there from will be measurable in direct proportion to their general recognition and actial use. Instances will occur when it may be necessary to diviate from the standard and the signing of an acceptance does not preclude such departtures; however, such signature indicates an intention to follow the commercial standard where practical, in the production, distribution, or consumption of the article in question.
The word criteria as used in this paragraph means most nearly:
The acceptor’s responsibility - the purpose of commercial standards is to establish for specific commoities, nationally recognized grades or consumer croteria and the benefits there from will be measurable in direct proportion to their general recognition and actial use. Instances will occur when it may be necessary to diviate from the standard and the signing of an acceptance does not preclude such departtures; however, such signature indicates an intention to follow the commercial standard where practical, in the production, distribution, or consumption of the article in question.
C. Usage.
D. Costs.
B. Standards.
67. When a fixture trap is ser greater than two (2') feet below its fixture outlet, the trap may lose the water seal due to: A. Self-siohonage. B. Momentum. C. Back-pressure. D. Evaporation.
B. Momentum.
- Siphonage may result in a hot water storage tank when the waterbservice pipe is:
A. Under excessive water pressure.
B. Shut off and a faucet on the supply line is opened in the basement.
C. Tapped for mixture with the hot water circulation line.
D. Oversized and excessive in length.
B. Shut off and a faucet on the supply line is opened in the basement.
69. Trisodium phosphate (TSP) when used before a joint is brazed, is to primarily: A. Remove surface scale. B. Prevent oxide from forming. C. Flux the surface. D. Remove oil or grease.
B. Prevent oxide from forming.
70. A hot water storage tank is 24 inches in diameter and 10 feet in length its capacity, in gallons, is most nearly: A. 180. B. 240. C. 300. D. 360.
B. 240.
.7854xDxDxHx7.48=235 gal.