Plumbing - Session 6 Part 1

In every building where public toilet facilities are provided there shall be at least one water closet stall wich is accessible to the phzsicallz handicapped, The minimum specification for this stall shall be: A. 40” wide, 60” deep and water closet seat 20”-21” high. B. 36” wide, 54”deep and water closet seat 20-22” high. C. 36” wide, 66” deep and water closet seat 17-19” high. D. 36” wide, 60” deep and water closet seat 16” high.

2. So that the ballcock (fill valve) will close even if the water closet combination shall be above the rim of the bowl at least: A. 1-1/2 inch. B. 3/4inch. C. 1 inch. D. 2 inch.

3. Which one of the following statements is most nearly correct:
   A. Stand pipe for domestic clothes washer shall be provided with a properly vented 1-1/2 inch trap.
   B. The waste pipe from more than one domestic clothes washing machine need not be trapped when discharging into a common indirect waste pipe .
   C. the waste from an automatic clothes washer shall discharge through an air break into a standpipe or into a laundry sink. The trap and fixture drain for an automatic clothes washer standpipe shall be a minimum of 2 inches in diameter. the automatic clothes washer fixture drain shall connect to a branch drain or drainage stack a minimum of three inches in diameter. Standpipes shall be individually trapped. Standpipes shall extend a minimum of 18 inches and a maximum of 42 inches above the trap weir. Access shall be provided to all standpipes and drains for rodding.
   D. Standpipes for domestic clothes washers shall be provided with a 2 inch trap but need not be vented.

4. Lavatories shall have a waste outlet diameter that is a minimum of:

A. 1 in.

B. 1-1/2 in.

C. 1-1/4 in.

D. 2 in.

5. A lavatory shall have a strainer, pop-up stopper, crossbar or other device:
   A. That would allow the user to have full access to the lavatory.
   B. Shall be provided to restrict the clear opening of the waste outlet.
   C. Shall be provided to un-restrict the clear opening of the waste outlet.
   D. Shall be provided so maintenance of fixture would be made easier.

Shower supply connection to a garbage can washer shall be a minimum floor area of at least:

A. 1,000 sq. in.

B. 900 sq. in.

C. 1,200 sq. in.

D. 750 sq. in.

7. Water supply connection to a garbage can washer shall be provided with:
   A. An air gap.
   B. An approved badkflow prevention device.
   C. A check valve.
   D. A & B.

Ballcock (fill valves) in flush tanks for water closets shall be located most nearly; at least 1 inch above the full opening of the:

A. Water closet seat.

B. Water closet tank overflow.

C. Water closet trap seal.

D. Water closet flush rim inlet holes.

Horizontal hard temper type "L" copper tubing for the branch water supply to a lavatory shall be supported at intervals no greater than:

A. 8 ft.

B. 6 ft.

C. 5 ft.

D. 4 ft.

10. Copper or copper alloy tubing “K” (2”) is to be used as a vent stack. The maximum intervals for supporting this stack is:
    A. At each story height no greater than 10 feet.
    B. 25 feet.
    C. 20 feet.
    D. At each story height no greater than 12 feet.

Forty-two feet of horizontal 1-inch hard temper type copper tubing has been installed for a water distribution system.The minimum number of supports for this line is:

A. 8.

B. 7.

C. 6.

D. 5.

Vertically installed steel screwed pipe (SPS) shall be supported:

A. Every 25 feet.

B. At every story heigh.

C. At every other story height.

D. Every 30 ft.

13. Bases of cast-iron stack shall be supported on:
    A. …
    B. …
    C. …

Vertical cast-iron soil pipes shall be supported at its base and at each:

A. Story height no greater than 20 feet.

B. Story height.

C. 10 ft.

D. Other floor.

The maximum interval between hangers for horizontal 1-1/2" hard temper type "K" tubing is:

A. 6 ft.

B. 10 ft.

C. 15 ft.

D. 20 ft.

Of the following chemicals, the one which is least like to dissolve or attack pure lead:

A. Diluted peat acids.

B. Diluted nitric acid.

C. Citric acid (in the presence of air).

D. Could hydrochloric acid.

17. As a safety precaution, concentrated sulfuric acid should be :
    A. Diluted by pouring the acid into the water.
    B. Stored in a metal container lined with a tin coating.
    C. Stored in a tile container lined with a zinc coating.
    D. Diluted by pouring cold water into the acid.

18. Vertical piping shall be supported at the following intervals:
    A. Cast iron: …
    B. Threaded brass pipe: …
    C. Copper or copper alloy tubing: …

Horizontal cast-iron soil pipes shall be supported at intervals at not more than:

A. 15 ft.

B. 10 ft.

C. 8 ft.

D. 5 ft.

The lowest point in the trap to which the liquid surface can drop before air or gas can pass through the trap is the :

A. Dip.

B. Crown weir.

C. Clean-out.

D. Crown.

21. Horizontal piping shall be supported:
    A. Cast iron: …
    B. ABS pipe: …
    C. PVC pipe: …
    D. Steel pipe: …
    E. Copper or copper alloy pipe: …
    F. Stainless steel drainage system: … ?

ABS and PVC plastic pope shall be supported in the horizontal position no greater than:

A. 2 ft.

B. 4 ft.

C. 6 ft.

D. 8 ft.

A two hard tempered type "L" copper tubing is to be run horizontally.The maximum interval between hangers for this line is most nearly;

A. 8 ft.

B. 10 ft.

C. 12 ft.

D. 15 ft.

Pipe nipples of 8-7/8", 11-1/2", 10-1/4". 7-1/16" and 9-3/4" were made. The minimum length of pipe used was most nearly. (Allow 1/16" for cutting):

A. 47-7/16",

B. 47-7/8".

C. 47-3/4".

D. 46-7/16".

25. The exception to the interval of support for piping systems designed to provide for expansion/contraction shall conform to the;
    A. There is no exception for supporting pipe other than what's in the table.
    B. Engineers or Architectural plans as approved by the owner.
    C. Engineered design in accordance with section 28-105.
    D. Licensed Master Plumbers design drawings submitted to the Engineer.

26. Which one of the following statements is most nearly correct:
    A. "P" trap connection with slip joints or ground joint connections, or stack cleanouts that are not more than one pipe diameter smaller than the drain served , shall be permitted as a cleanout.
    B. Only if the finished grade level is within 2 ft. of the finished grade level.
    C. Cleanouts shall be installed at each change of horizontal directionof the building (house) drain 45degrees or less.
    D. A cleanout shall be provided at or near the foot of each vertical inside leader, vent stack, waste stack or soil stack.

27. Each fixture trap shall have a liquid seal of not less than .. and not more than … . or deeper for special designs relating to accessible fixtures. Where a trap seal is subject to loss by evaporation. A trap … shall be installed.
    A. 2 inches, 4 inches, seal primer valve.
    B. 2 inches, 6 inches check valve.
    C. 2 inches, 3 inches, check valve.
    D. 2 inches 4 inches, check valve.

Oil separator shall have a depth of not less than ,,, below the invert of the discharge drain. The outlet opening of the separator shall have not less than an ... water seal.

A. 24 inches, 18 inch water seal.

B. 18 inches, 24 inch water seal.

C. 18 inches, 18 inch water seal.

D. 24 inches, 24 inch water seal.

The drain line into an oil separator shall be provided with a fresh air inlet that is connected in the inlet side of the separator and terminates most nearly:

A. 6 inches above grade.

B. 6 inches above the separator.

C. 12 feet above grade.

D. Not required.

Cleanouts on a 6-inch building (house) trap is required to be a minimum diameter of most nearly:

A. 3 in.

B. 4 in.

C. 5 in.

D. 6 in.

For the purpose of rodding, cleanouts on 3-inch or larger pipes shall be so installed that is a clearance of not less than:

A. 18 in.

B. 24 in.

C. 30 in.

D. 36 in.

Which one exception. a cleanout shall be provided at, or near, the foot of each vertical stack. The one exception:

A. Vent stack.

B. Conductor.

C. Waste stack.

D. Soil stack.

Which one drain is not permitted to discharge after the building (house) trap of a combined building drain:

A. Subsoil drains.

B. Storm.

C. Oil separator.

D. Sewage ejector.

Which drainage system carries clear waste water only:

A. Sanitary drains.

B. Building subdrains.

C. Building subsoil drains.

D. Combined house sewers.

The probable results of double trapping a fixture is most likely:

A. The probable results of double trapping a fixture is most likely:

A. Loss of water.seal due to momentum.

B. Obnoxious gases entering into the room.

C. Loss of water seal due to siphonage.

D. A stoppage in the waste branch.

The type of trap that is permitted for use in a plumbing system:

A. Traps that depend on moving parts to maintain the seal.

B. Bell traps.

C. Crown vented traps.

D. A stoppage in the waste branch.

A grease interceptor may de used in lieu of an individual fixture trap if the developed length from the fixture outlet to the inlet of the interceptor is not more than:

A. 24 in.

B. 36 in.

C. 48 in.

D. 60 in.

The oil separator capacity in an automotive service station where three cars can be both serviced and stored and has a 600 square of area to be drained shall be a minimum:

A. 8 cubic feet.

B. 9 cubic feet.

C. 10 cubic feet.

D. 11 cubic feet.

To bring the PH value of the waste water to acceptable levels, the neutralizing pit shall hold an adequate quantity of:

A. Zinc chloride.

B. Graphite.

C. Marble chips (limestone).

D. Mica.

A cleanout on an 8-inch building house drain shall be at least:

A. 6 in.

B. 5 in.

C. 4 in.

D. 3 in.

A food scrap sink does not require an individual fixture trap when the developed length from the fixture outlet to the grease trap inlet does not exceed:

A. 24 in.

B. 36 in.

C. 48 in.

D. 60 in.

A 10-inch building house drain which receives flow from water closets has a total horizontal (strait) run of approximately 120 feet before connecting to the building house trap. The minimum number and the minimum size of cleanouts which shall be provided in this run of the building house drain are:

A. Two cleanouts, 5 inch size.

B. Three cleanouts, 4 inch size.

C. Two cleanouts, 4 inch size.

D. Three cleanouts, 5 inch size.

The minimum number of cleanouts reqired for a building house drain with two eight bends of 140 feet,in length:

A. 5.

B. 4.

C. 3.

D. 2.

The minimum water seal that a sand interceptor shall have is most nearly:

A. 2 in.

B. 3 in.

C. 6 in.

D. 9 in.

For each individual fixture the correct trap size is:

A. Bathtub …

B. Dishwashing machine, domestic …

C. Drinking fountain …

D. Lavatory …

E. Emergency floor drain …

F. Laundry tray (1 or 2 compartments) …

G. Kitchen sink, domestic with food waste grinder and or dishwasher …

H. Urinal …

I. Bidet …

J. Shower stall …

For fixtures added to a dwelling unit bathroom group:

A. Add the DFU value of those additional fixtures to the bathroom group fixture count.

B. Use each DFU for each fixture and add.

C. Same as the old code.

D. Add the DFU value of those additional fixtures to the bathroom group and add 2 FU for each added fixture.

Trap size shall be consistent with the:

A. Drainage fixture units (DFU).

B. With the minimum pipe size.

C. Fixture outlet size.

D. Maximum pipe sizes.

A jacuzzi bathtub with a 2 inch trap is added on to a bathroom group consisting of a 1.6 gpf water closet, lavatory, bathtub or shower, including a bidet and an emergency floor drain; such fixture are together in the same room.

A. 6.

B. 7.

C. 8.

D. 9.

Except when found necessary by the administrative authority for special designs relating to accessible fixtures conditions, each fixture trap shall have a water seal of not more than:

A. 2".

B. 3".

C. 4".

D. 6".

The maximum distance that a building (house) trap handhole extension shall be above the centerline of the drain is:

A. 12".

B. 18".

C. 24".

D. 30".

Cleanouts on horizontal soil lines should be of the same nominal size as the pipe for diameters up to 4 inches. For pipes larger in diameter than 4 inches than 4 inches the cleanout should not be less than:

A. 4 in.

B. 5 in.

C. 6 in.

D. 8 in.

A device to separate volatile light density substances from he waste water is:

A. Grease trap.

B. Plaster trap.

C. Oil separator.

D. Sediment interceptor.

The one location that the discharge of an oil separator cannot be independently connected to is the:

A. Building house drain.

B. Building house sewer.

C. Street side of the building trap.

D. Street (public) sewer.

All bearing parts of backwater valves shall be:

A. Rust proof.

B. Corrosion resistant material.

C. Non-absorbent material.

D. Non-metallic material.

Slip joints, when used in approved plumbing installations, are generally not found:

A. Trap outlet.

B. Trap inlet.

C. Within the trap.

D. Cast iron caulked joints.

In a commercial laundry the wire basket shall prevent from going into the drainage system any solids that are at least:

A. 0.5 inches.

B. 0.375 inches.

C. 0.75 inches.

D. 0.25 inches.

The outlet opening of oil separators shall have a water seal not less than:

A. 6 in.

B. 12 in.

C. 18 in.

D. 24 in.

A combination of plumbing fixtures permitted to be installed on one trap provided that one compartment is not more than ... deeper than the other compartment and the waste outlets are not more than ... apart.

A. 6 inches, 30 inches.

B. 6 inches, 24 inches.

C. 8 inches, 24 inches.

D. 8 inches, 30 inches.

Each plumbing fixture shall be separately trapped by a water seal trap, except as otherwise permitted by this code. The trap shall be placed as close as possible to the fixture outlet.The vertical distance from the fixture outlet to the trap weir not exceed:

A. 12 inches.

B. 24 inches.

C. 30 inches.

D. 36 inches.

60. Each trap and trapped fixture is permitted to be provided with an individual vent. The individual vent shall connect not more than:
    A. 24 inches to the fixture drain of the trap or trapped fixture being vented.
    B. 36 inches to the fixture drain of the trap or trapped fixture being vented.
    C. 48 inches to the fixture drain of the trap or trapped fixture being vented.
    D. inches to the fixture drain of the trap or trapped fixture being vented.

In garages and service stations where automobiles are serviced, greased, repaired or washed or where gasoline is dispensed, oil separators shall have a minimum capacity of :

A. 6 cu. ft.

B. 3 cu. ft.

C. 1-1/2 cu. ft.

D. 1 cu. ft.

A restaurant is to have a pot sink, food scrap sink and a commercial dishwasher. The minimum number of grease interceptors required is/are :

A. 1.

B. 2.

C. 3.

D. 4.

The vertical distance from the fixture outlet to the trap weir shall not exceed :

A. 18 in.

B. 24in.

C. 30 in.

D. 48 in.

Which one of the following conditions must be met when one grease interceptor is supplied for more than one fixture :

A. All fixtures shall be trapped but need not to be vented. The interceptor shall be vented only on the outlet side.

B. All fixtures shall be both trapped and vented. The interceptor need not be vented.

C. The interceptor shall be vented when serving two or more individually trapped and vented sink with the flow control air intake intersecting the sanitary vent system.

D. All fixtures shall be both trapped and vented. The interceptor need only be vented on the inlet side.

65. Which one of the following statements is not correct:
    A. Interceptors and separators shall be provided to prevent the discharge of oil, grease, sand or other substances harmful or hazardous to the building drainage system, the public sewer, or sewage treatment plant or processes.
    B. A grease trap or grease interceptor shall be required to receive the drainage from fixture and equipment with grease-laden waste located in food preparation areas, such as in restaurants, hotel kitchens, hospitals, school kitchens, bars, factory cafeterias, or restaurants and clubs.
    C. Grease traps and grease interceptors shall conform to PDI G 101, ASME, A112.14.3 or ASME A112.14.4 and shall be installed in accordance with the manufactures' instructions.
    D. A grease trap or grease interceptor shall be required for individual dwelling units or any private living quarters.

Water service pipe shall be sized to supply water to the structure in the quantities and at the pressures required in this code. The minimum diameter of water service pipe shall be:

A. 3/4".

B. 1".

C. 1-1/4".

D. 1-1/2".

Water service pipe and building sewer shall be separated by :

A. 5 feet.

B. 10 feet.

C. 15 feet.

D. 20 feet.

"One of the most important items that must be determined before any part of the water piping system can be sized is the probable rate of flow in any particular reach of piping. The rate o flow in the service line, risers, and main branches, however, will rarely be equal to the sum of the rates of flow of all connected fixtures.In fact, the probability of every fixture in a large group being used at the same time is so remote that it would be very poor engineering to the design the piping large enough to take care of such simultaneous".
The statement above indicates when sizing water pipes:
A. The probable rate of water supply, does not determine the pipe size.
B. The probable rate of water supply will help determine the pipe size.
C. The probable rate of water supply will determine the pipe material.
D. Friction in water supply is never calculated in sizing water pipe.

69. " One of the most important items that must be determined before any part of the water piping system can be sized is the probable rate of flow in any particular reach of piping. The rate o flow in the service line, risers, and main branches, however, will rarely be equal to the sum of the rates of flow of all connected fixtures.In fact, the probability of every fixture in a large group being used at the same time is so remote that it would be very poor engineering to the design the piping large enough to take care of such simultaneous".
    The statement above indicates when sizing water pipes :
    A. You should size water pipes with the maximum rate of water flow.
    B. Knowing the maximum rate of flow will not help you size pipe.
    C. The sum of all the water flowing hardly ever is equal to maximum flow of all fixtures.
    D. We size water pipes to the required maximum guaranteed flow.

70. " One of the most important items that must be determined before any part of the water piping system can be sized is the probable rate of flow in any particular reach of piping. The rate o flow in the service line, risers, and main branches, however, will rarely be equal to the sum of the rates of flow of all connected fixtures.In fact, the probability of every fixture in a large group being used at the same time is so remote that it would be very poor engineering to the design the piping large enough to take care of such simultaneous".
    The statement above indicates when sizing water pipes:
    A. The probability of all the fixtures being used at the same time , can happen.
    B. It's not good engineering practice to oversize water pipe.
    C. It's good engineering [practice to oversize, because it guarantees need.
    D. Piping should be large enough to take care of simultaneous flow.

71. In apartment houses the per capita daily water consumption is generally higher than in single family houses. This is due to the central metering system which result in high heat losses, thus in the wasting of water. In designing water supply systems for apartment houses, a daily per capita water consumption of:
    A. 125 gallons may be considered a safe design figure.
    B. 100 gallons may be considered a safe design figure.
    C. 75 gallons may be considered a safe design figure.
    D. 50 gallons may be considered a safe design figure.

Floor outlet fixtures shall be secured to the floor or floor flanges by:

A. Screws corrosion-resistant material.

B. Bolts corrosion-resistant material.

C. Brass or copper nails.

D. A & B.

Wall-hung closet bowls shall be supported by a concealed:

A. Wooden carrier.

B. Metal carrier.

C. Plastic carrier.

D. B & C.

Wall-hung water closet bowls shall be supported by concealed carriers that is attached to the building structural members so that:

A. Strain is not transmitted to the closet connector or any part of the plumbing system.

B. Strain is not transmitted to the concealed carrier or any part of the plumbing system.

C. Strain is not transmitted to the structural members or any part of the plumbing system.

D. Strain is not transmitted to the building structure or an part of the plumbing system.

Joints formed where fixture come in contact with walls or floors:

A. Must be open.

B. Must be flexible.

C. Shall be sealed.

D. Must be tight.

76. In mental health centers, pipes or traps shall:
    A. Ferrous materials.
    B. Not be exposed.
    C. Fixtures shall be bolted through walls.
    D. B & C.

77. Where any fixture as provided with an overflow, the waste shall be designed and installed so that standing water in the fixture:
    A. Will rise in the overflow.
    B. Will rise in the overflow when the stopper is closed.
    C. Will not rise in the overflow when the stopper is closed, and no water will remain in the overflow when the fixture is empty.
    D. Will not rise in the overflow when the stopper is closed, and no water will remain in the overflow when the fixture is full.

78. The overflow from any fixture shall discharge into the drainage system on the :
    A. Inlet or fixture side of the trap.
    B. Outlet or the fixture side of the trap.
    C. Inlet or the house side of the trap.
    D. Outlet or the house side of the trap.

79. The exception to the law on the overflow from a flush tank serving a water closet or urinal shall discharge into the :
    A. Fixture served.
    B. Drainage system on the outlet or fixture side of the trap.
    C. Inlet side or fixture side of the trap.
    D. Drainage system on the outlet or the house side of the trap.

Slip joint connection shall be made with an approved

A. Oakum.

B. Elastomeric gasket.

C. Quick wick.

D. lamp wick.

81. Slip joint connections on fixtures with concealed slip-joint connection shall be provided with:
    A. Access panel.
    B. Utility space at 12 inches in its smallest dimension.
    C. Approved arrangement so as to provide access to the slip joint connections for inspection and repair.
    D. A, B & C.

Slip joint connections shall be installed in the:

A. Trap outlet.

B. Trap inlet.

C. Within the trap seal.

D. A, B & C.

The water supply to an automatic clothes washer shall be protected against backflow by an:

A. Air gap installed integrally within the machine.

B. Air break installed integrally within the machine.

C. Check valve and atmospheric vacuum breaker.

D. Check valve.

The waste from an automatic clothes washer shall discharge through an ... into a standpipe or into a laundry sink:

A. Air gap.

B. Air break.

C. Check valve.

D. Vacuum breaker.

The trap and fixture drain for an automatic clothes washer stand pipe shall be a minimum of:

A. 1-1/2 inches in diameter.

B. 2 inches in diameter.

C. 2-1/2 inches in diameter.

D. 3 inches in diameter.

The automatic clothes washer fixture drain shall connect to a branch drain or drainage stack a minimum of:

A. 1-1/2".

B. 2".

C. 2-1/2".

D. 3".

Bath tub shall have waste outlet a minimum of:

A. 1.5 inches in diameter.

B. 1.25 inches in diameter.

C. 2.5 inches in diameter.

D. 3 inches in diameter.

Windows and doors within a bathtub enclosure shall conform to the safety glazing requirements of the:

A. NYS building code.

B. NYC building code.

C. BSA.

D. MEA.

Bathtub enclosure doors within a bathtub enclosure shall conform to :

A. BSA rules.

B. ASME rules.

C. ASSE rules.

D. NSF rules.

The water supply to a bidet shall be protected against backflow by an:

A. Air chamber.

B. Air gap or backflow preventer.

C. Check valve or backflow preventer.

D. Gate valve.

The water supply to a dishwashing machine shall be protected against backflow by an:

A. Air gap.

B. Backflow preventer.

C. A & B.

D. Check valve.

92. Where water is served in restaurants:
    A. Drinking fountain shall be installed.
    B, Drinking fountain shall not be required.
    C. The water must be served with ice cubes.
    D. The water doesn't have to be potable.

In other occupancies in other restaurant where drinking fountains are required, bottled water dispenser shall be permitted to be substituted for not more than ... percent of the required drinking fountains.

A. 50.

B. 25.

C. 35.

D. 20.

Emergency shower and eyewash stations wast connections shall :

A. Not be required.

B. Be required.

C. Be 2 inches.

D. Be 3-1/2 inches.

Floor drain traps shall have:

A. Permanent strainers.

B. Removable strainers.

C. The inlet larger than the outlet.

D. The strainers shall have 1/4 inch holes.

The strainer used on floor drain traps shall have a waterway area of:

A. Less than the area of the tailpiece.

B. Not less than the area of the tailpiece.

C. Less than the area of the outlet.

D. Not less than 2 inches.

Floor drains shall be constructed so that the drain is :

A. At least 1-1/4 inches in diameter.

B. Made only of approved plastic.

C. Capable of being cleaned.

D. Concealed from view in most cases.

Floor drains shall be installed so that:

A. Access shall not be provided to the drain inlet.

B. Access shall be provided to the drain inlet.

C. They are in concealed area.

D. The inlets are larger the outlets.

Floor drains shall have a minimum :

A. 2" diameter.drain outlet.

B. 2-1/2" diameter.drain outlet.

C. 3" diameter.drain outlet.

D. 4" diameter.drain outlet.

In a public coin operated laundries and in the central washing facilities of multiple-family dwellings, the room containing automatic clothes washers shall be provided with floor drain provided with floor drains located;

A. To readily drain the entirely floor area.

B. To readily drain part of the floor area.

C. In the middle of the floor area.

D. In the side of floor area.