Plumbing - Session 9 Part 2

Water the t comes in contact with copper pipes, sometimes has a bluish color. The reason most generally for the cost of the color is:

A. Corrosion.k

B. Electrolysis.

C. Pitting.

D. Rust.

To prevent the flow up on a circulation riser when hot water is being used, the valve most likely installed is a:

A. Gate valve.

B. Check valve.

C. Globe valve.

D. Relief valve.

In reference to hot water system the one statement is most nearly correct i s that:

A. Circulating lines are of greatest importance where the use of hot water is intermittent.

B. Air chambers are mainly used to properly vent hot water risers.

C. Where hot water lines are not circulated, it is good practice to make the diameter of hot water supply lines larger than usual.

D. Constant circulation of hot water reduces heat losses from bare pipes.

The proper type of insulation to use on cold water pipe lines to prevent sweating is:

A. 85% magnesia covering.

B. Moister-resisting asbestos paper.

C. Hair felt covering.

D. Asbestos-sponge felted insolation.

Roof tanks from which water is furnished for drinking and domestic purposes are required to be emptied and thoroughly cleaned at least a minimum of once every:

A. 5 year.

B. 3 year.

C. 2 year.

D. 1 year.

In a down feed type hot and cold water distribution system in a five story apartment house which is supplied directly from adequate service main pressure, the main hot and cold risers should run unreduced in size to the:

A. Fourth story at the celling level and then branch out.

B. Fifth story just below the roof and then branch out.

C. Midway in the fifth story level and then branch out.

D. Fourth story just above the floor level and then branch out.

A pressure relief valve installed in a water supply system to a hot water storage tank was set at 90 psi. The maximum normal working pressure in the system shall be most nearly:

A. 90 psi.

B. 65 psi.

C. 115 psi.

D. 45 psi.

All pipes conveying non-potable water supplies shall be identified by a paint that os color coded using the color:

A. Yellow.

B. Orange.

C. Red.

D. Black.

Sizes of connections for fire services shall be subject to the requirements of the department of:

A. Department of Environmental Protection.

B. Fire department.

C. Department of water supply.

D. Department of buildings.

A flushometer valve for urinal is to operate at the minimum pressure permitted. The street water main fluctuates in pressure between 28 psi and 42 psi. The maximum height above the street main that the urinal may be installed is most nearly:

A. 80 feet.

B. 70 feet.

C. 55 feet.

D. 30 feet.

The hypochlorite solution that is used for disinfection the inside surface (washed) of a domestic water supply tank usually contains a minimum available chlorine:

A. 40 parts per million.

B. 60 parts per million.

C. 80 parts per million.

D. 100 parts per million.

The minimum permitted size of a water tap and minimum size service pipe that can be used is:

A. 5/8 in. tap, 3/4 in. service. B.. 3/4 in. tap, 1 in. service.

C. 3/4 in. tap, 3/4 in. service.

D. 1 in. tap, 1 in. service.

The minimum spacing interval for corporation stops (traps) and wet connections for both three quarter inch and one inch corporation stops (taps) shall be:

A. 12 inches.

B. 18 inches.

C. 24 inches.

D. 30 inches.

Clearance shall be provided around a water service pipe passing through a wall for protection, clearances between the outside of the pipe and the wall shall not be less than:

A. 3/8 in.

B. 1/2 in.

C. 3/4 in.

D. 1 in.

Required capacity at fixture supply pipe outlets, minimum pressures as per manuf. recommendation for bathtubs, combination fixture, residential dishwasher, drinking fountain, laundry tray, lavatory, shower, sill cock (hose bib), residential sink, service sink and water closet one piece with tank.

A. 4 psi.

B. 8 psi.

C. 15 psi.

D. 20 psi.

An automatic flushometer valve for a siphonic water closet shall not be used on a fixture, (blowout water closers) when the guaranteed pressure is less than:

A. 8 psi.

B. 10 psi.

C. 25 psi.

D. 20 psi.

What is the minimum size fixture supply pipe to a flushometer tank water closet, flush tank water closet, lavatory, drinking fountain and bidet:

A. 3/8 in.

B. 1/4 in.

C. 1/8 in.

D. 1/2 in.

Corporation stops, wet connections, or other connections to a street main shall be made only by employees of the Department of Environmental Protection. The cost of the installation shall be borne by:

A. The owner of the property for which the connection is made.

B. Licensed Master [lumber.

C. Permittee.

D. General contractor.

Which one of the following statement is not correct:

A. Riser valves on one-family dwellings need not be installed.

B. In multistory buildings, a valve shall be installed at the to of each water supply down-feed pipe.

C. Riser valves eliminates the need for branch control valves to any dwelling unit.

D. In a factory individual fixture stop valves eliminates the need for a branch control valves.

Overflows for gravity tanks shall be provided with durable screening with openings of more than:

A. 1/2 in.

B. 3/8 in.

C. 1/4 in.

D. 1/8 in.

Each direct water connection to a refrigerator or air conditioning unit using city water for cooling purposes shall be equipped with a:

A. Check valve set not more than two feet from the unit.

B. Check valve set not more than three feet from the unit.

C. Check valve set not more than four feet from the unit.

D. Check valve set not more than one feet from the unit.

A particular plumbing specification calls for the inspection of a double suction single stage centrifugal type water pump. /this type of pump may be described as having:

A. A suction inlet on each side of the single impeller from a common connection and a single discharge connection from the impeller.

B. A suction inlet to one side of each impeller and a combined or common discharge from the impellers.

C. A suction inlet to the impeller which is at least three pipe sizes larger than the discharge.

D. An open impeller with fairly large clearances.

Where there is any possibility of back-flow from tanks, siamese connections, or other apparatus or fixtures within the building a check valve shall be placed within:

A. Meter inlet valve and the meter.

B. 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 check valve on the main cold water down supply to prevent back-flow of water into the roof tank.

C. Meter and test tee.

D. Within two feet of the meter outlet.

Connections to city water mains shall comply with the rules of the Department of:

A. Buildings.

B. Housing and development.

C. Fire of N.Y.C.

D. Environmental Protection.

Hot water supply system in a tall building is designed for pressure reducing valves. the best location for these valves is most nearly:

A. On each riser.

B. At the hot water generator.

C. At each fixture.

D. On each branch.

The demand load in a building water supply system shall be based on the following data:

A. The number of fixtures installed, the simultaneous use of these fixtures and the length of pipe needed.

B. The kind of fixtures installed, the simultaneous use of these fixtures and the size of pipes to these fixtures.

C. Peak demand , the capacities at the fixture supply pipe outlets, the minimum flow rate and flow pressure provided to fixtures and appliances.

D. The number of fixtures installed, the size of pipes to these fixtures and the length of pipe needed.

Potable water service pipes shall not be located in, under or above cesspools, septic tanks, septic tank drainage fields or seepage pets and shall be separated by a minimum of:

A. 10 feet.

B. 12 feet.

C. 4 feet.

D. 15 feet.

Water main corporation stops (taps) shall be installed in:

A. Wherever it makes common sense, front, side or rear.

B. As directed by the Department of Buildings.

C. In front of the property to be supplied with water.

D. In front or the side of the property to be supplied with water.

Each new or repaired service pipe be shall be subjected to a pressure test conducted by the Licensed Master Plumber in the presence of a Department inspector. All service pipes and appurtenance shall remain uncovered for the duration of the test for observance of leakage. The test pressure shall be:

A. 25% above the operating pressure.

B. 150 pounds above street pressure.

C. 175 pounds above street pressure.

D. Under street main pressure.

A water test shall be applied to each new or repaired service pipe. Where the street main pressure is 40 psi., the test pressure applied to the service would be:

A. 50 psi.

B. 190 psi.

C. 215 psi.

D. 40 psi.

All water used in the construction of building s shall be metered the building is higher than:

A. 3 stories or more than 30 feet high.

B. 4 stories or more than 40 feet high.

C. Higher than five stories or 75 feet or more in height.

D. Higher than six stories or more than 75 feet.

All water meters used for billing purposes shall read:

A. In cubic inches per minute,

B. In gallons per minute.

C. In liters per minute.

D. In cubic feet.

Where flushometers, suction tanks, other fixtures or piping rquipped with quick closing valves and are wupplied by direct street pressure, an approved water hammer arrestor shall be installed in the service pipe:

A. Two ft. downstream of the meter as required by the building code.

B. Three ft. downstream of the meter as required by the building code.

C. Four ft. downstream of the meter as required by the building code.

D. Five ft. downstream of the meter as required by the building code.

All meter setting shall contain a test tee or valve ... of the meter and before he outlet valve.

A. Downstream.

B. Upstream.

C. Water main side.

D. Street side.

Where street water main pressures fluctuate, the building water distribution system shall be designed for the:

A. Maximum pressure available.

B. Minimum pressure available.

C. 25% above minimum pressure .

D. 25% above maximum pressure .

The one location where a check valve shall be placed in water services is most nearly when:

A. A meter 3-inch or larger is required.

B. Flushometers are used in commercial buildings.

C. A building is supplied by two different mains.

D. The street main exceed 50 pounds per square inch.

Location of shutoff valves are not required on the following location:

A. On the fixture supply to each plumbing fixture other than bathtub and showers in one-and two-family residential occupancies.

B. On the water supply pipe to each sill cock.

C. On the water supply pipe to each appliance or mechanical equipment.

D. On the hot water supply exiting the hot water storage tank.

The minimum flow rate in gallons per minute necessary to properly flushed a flushometer type urinal is:

A. 18 gpm.

B. 20 gpm.

C. 25 gpm.

D. 30 gpm.

Which of the following statements is not true:

A. Potable water gravity tank covers shall be covered to keep out unauthorized persons, dirt and vermin.

B. The covers of gravity water supply tanks shall be vented with a return bend pipe with an area not less than the area of the down-feed riser pipe.

C. /The vent connected to all water supply tanks shall be screened with a corrosion-resistant screen of not less than 16 by 20 mesh per inch.

D. Each gravity or suction water supply tank shall be provided with an overflow pipe and the outlet shall not discharge within 12 inches of a roof drain, or over an open water supplied fixture.

Each direct water connection to a refrigeration or air conditioning unit using City water for cooling purposes shall be equipped with an approved check valve set not more than two feet from the unit and an approved relief valve installed on the outlet side of the check valve. The refrigeration system contains 45 pounds of refrigerant and shall be provided with a relief valve. The maximum water pressure at the point of installation to the relief valve is 65 lbs/per sq. inch. Under these conditions this relief valve shall be set at:

A. 75 psi.

B. 70 psi.

C. 65 psi.

D. 60 psi.

Connections to premises with a pumped water supply must be equipped with either a suction or a surge tank when the pumped supply exceeds:

A. 100 g/p/m.

B. 200 g.p.m.

C. 300 g.p.m.

D. 400 g.p.m.

All permits for work requiring opening of obstructing a street and/or sidewalk in the installation of a water service shall be obtained from:

A. Department of Buildings.

B. Department of Transportation (DOT).

C. Department of Water Supply.

D. Department Department of Public Work.

Building subdrains that cannot be discharged to the sewer by gravity flow shall be discharged into a tightly covered and vented ejector pit/basin from which the liquid shall be lifted by automatic pumping equipment or other approved method into the:

A. Street sewer.

B. Building gravity drainage system.

C. Conductor.

D. Building subdrain.

All covered and vented ejector pit/basins receiving sewage and being pumped into the gravity drainage system shall have a check valve and a full open valve, located on the:

A. Discharge side of the pump.

B. Upstream side of the check valve

C. Pump or ejector suction piping.

D. Pit cover.

Sewage ejector pits shall be not less than:

A. 12 inches in diameter and 24 inches deep.

B. 18 inches in diameter and 24 inches deep.

C. 24 inches in diameter and 24 inches deep.

D. 30 inches in diameter and 24 inches deep

Bathtub (with or without overhead shower or whirlpool attachments) having a trap size of two inches has a drainage fixture unit value of:

A. 3.

B. 2.

C. 1.

D. 4.

Horizontal stack offsets shall be sized as required for:

A. Building drains.

B. Branches.

C. Straight stacks.

D. Offsets.

Horizontal offsets of drainage stacks shall be vented:

A. Where 10 or more drainage stacks shall be vented.

B. Where 8 or more drainage stacks shall be vented.

C. Where 5 or more drainage stacks shall be vented.

D. Where 1 or more drainage stacks shall be vented.

When venting horizontal offsets of drainage stacks where five or more branch intervals are located above the offset; shall be vented by venting:

A. The upper section of the drainage stack.

B. The lower section of the drainage stack.

C. Using a 3" vent.

D. A & B.

Where venting horizontal offsets of drainage stacks where five or more branch intervals are located above the offset; the offset shall be vented by venting:

A. Vented as a continuous vent.

B. Vented as a separate stack.

C. Vented as a separate branch.

D. RE-vented to the lower stack.

All water pressure tanks shall be provided with a ... ... valve at the top of the tank that will operate up to a maximum water pressure of ... and up to a maximum temperature of ... .

A. Vacuum relief, 212 psi. 200*F.

B. Vacuum relief, 200 psi. 200*F.

C. Vacuum relief, 200 psi. 2122*F.

D. Temperature and pressure relief, 200 psi. 200*F.

When installing a vacuum relief valve on top a water pressure tank the minimum size shall be:

A. 0.25 inch.

B. 0.375 inch.

C. 0.50 inch.

D. 0.625 inch.

Every pressure tank in a hydro-pneumatic pressure booster system shall be protected with a:

A. Temperature relief valve.

B. Temperature and pressure relief valve.

C. Pressure relief valve.

D. Vacuum relief valve.

When pressure relirf valves are used on the tank in a hydro-pneumatic pressure booster system the relief valve shall be installed on the:

A. Supply pipe to the tank.

B. On the tank.

C. Before the control valve.

D. A &B.

All relief valves using a hydro-pneumatic pressure booster system shall discharge by gravity to:

A. Safe place of disposal.

B. Basement.

C. Outside air.

D. Sub-drainage.

In non-residential occupancies, hot water or tempered water shall be supplied for bathing and washing purposes. Tempered water shall be delivered for:

A. No-accessible hand-washing facilities.

B. Accessible hand-washing facilities.

C. Culinary purposes.

D. Laundry purposes.

Automatic circulating hot water system pumps or heat trace shall be arranged to be conveniently turned off:

A. Automatically when the hot water system is not in operation.

B. Manually, when the hot water system is not in operation. lC. Automatically or manually, when the hot water system is in operation.

D. Automatically or manually, when the hot water system is not in operation.

Were a thermostatic mixing valve is used in a system with a hot water re-circulaing pump, the hot water or tempered water return line shall be routed to the:

A. Cold water inlet pipe of the water heater.

B. Cold water inlet pipe or the hot water return connection of the thermostatic mixing valve.

C. A & B.

D. Hot water inlet pipe or the hot water return connection of the thermostatic mixing valve.

For water service system sizes upto an including 2 inches , because of thermal expansion, the pressure on the downstream side of a pressure on the downstream side of a pressure-reducing valve exceeds the pressure-reducing valve setting a:

A. Device for controlling pressure shall be installed.

B. Check valve must be installed.

C. Gate valve must be installed.

D. Globe valve must be installed.

Where a back flow prevention device, check valve or other device is installed on a water supply system utilizing storage water heating equipment such that thermal expansion causes an increase in pressure:

A. A device for controlling pressure shall be installed.

B. A check valve must be installed.

C. Gate valve must be installed.

D. Globe valve must be installed.

Fixture fittings, faucets and diverters shall be installed and adjusted so that the flow of hot water from the fittings corresponds to the:

A. Right or left hand of the fixture fitting.

B. Right-hand side of the fixture fitting.

C. Left-hand side of the fixture fitting.

D. A & B above.

On shower and tub/shower mixing valves conforming to ASSE 1016, where the flow of hot water corresponds to the :

A. Left-hand side of the fixture.

B. Marking on the device.

C. Fight or left-hand side of the fixture.

D. A & B.

The water supply for hospital fixtures shall be protected against backflow with a reduced pressure principal backflow preventer, an atmospheric or spill-proof vacuum breaker, or an air gap.Vacuum breakers for bedpan washer hoses shall not be located less than ... above the floor.

A. 2 feet.

B. 3 feet.

C. 5 feet.

D. 6 feet.

The relieving capacity of each pressure relief valve and each temperature relief valve shall:

A. Not be equal or exceed the heat input.

B. Equal or exceed the heat input to the water or storage tank.

C. Not exceed the heat input.

D. Equal and not exceed the input.

Vacuum breakers for hose connections in health care or laboratory areas shall not be less than ... above the floor:

A. 6 feet.

B. 5 feet.

C. 4 feet.

D. 3 feet.

Chemicals and other substances that produce either toxic conditions, taste, odor or discoloration in a potable water system:

A. May be introduced into such systems with DOB approvals.

B. Shall not be introduced into such system,

C. Shall not be installed in such systems.

D. B & C.

Except where approved protective devices are installed cross connections:

A. Shall be permitted.

B. Shall be prohibited.

C. May be installed.

D. A & C are correct.

Combination stop-and-waste valves or cocks:

A. May be installed in all areas.

B. Shall be installed.

C. Shall not be installed underground.

D. Shall be allowed underground with permission.

In all buildings where two or more water distribution systems, one potable water and the other non-potable water, are installed, each system shall be identified by:

A. Color markings.

B. Metal tags.

C. Stamping.

D. A & B.

Pipe identification of potable and non-potable water shall include the contents of the piping system

and an … indicating the direction of flow. Hazardous piping systems shall also contain … addressing the nature of the hazard. Pipe identification shall be repeated at maximum intervals of … ft. and at each point where the piping passes through a wall, floor or roof.,,, shall be readily observable within the room or space the piping is located:

A. Arrow, information, 25, lettering.

B. Arrow, flow, 25, lettering.

C. Mark, information, 25, lettering.

D. Arrow, information, 20, lettering

Pipe identification of potable and non-potable water using color of the pipe as identification shall be discernible and consistent throughout:

A. The floor.

B. The building.

C. The room.

D. The cellar.

Barometric loops shall precede the point of connection and shall extend vertically to a height of:

A. 10'.

B. 25'.

C. 35".

D. 40'.

Fill in the blank spaces:

The size of the background color field and lettering when identifying potable and non-potable water distribution systems shall comply with table 608.8.3:

Sizes of pipe identification.

A. Pipe diameter (inches).

B. Length Background color field (inches).

C. Size of letters (inches).

A. 3/4 to 1-1/4 B. C.

A.1-1/2 to 2 B. C.

A. 2-1/2 to 6. B. C.

A. 8 to 10. B. C.

A. Over 10. B. C.

Water utilized for the cooling of equipment of other processes shall be returned to the potable water system. Such water shall be discharged into a drainage system through an ... or shall be utilized for non-potable purposes:

A. Air break.

B. Air gap.

C. Direct connection.

D. RPZ.

Piping that has been utilized for any purpose other than conveying potable water ... be utilized for conveying potable water:

A. May be reused if purified.

B. Shall.

C. Shall not.

D. May.

The interior surface of a potable water tank shall not be lined, painted or repaired with any material that changes the ... of the water supply when the tank is placed in, or returned to, service:

A.Taste.

B. Color.

C. Odor.

D. A, B & C.

Water pumps, filters, softeners,tanks and all other devices that handle or treat potable water shall be protected against:

A. Unlicensed plumbers.

B. Homeowners.

C. Contamination.

D. A, B & C.

The minimum required air gap shall be measured vertically from the lowest end of a potable outlet to the :

A. Flood level rim of the fixture or receptacle.

B. Overflow rim of the fixture or receptacle.

C. Outlet of the fixture or receptacle.

D. Below the flood level rim of the fixture .

Back-flow preventers with intermediate atmospheric vents shall conform to ASSE 1012 or CAN/CSAB64.4. These devices shall be permitted to be installed where subject to:

A. Semi-flow conditions.

B. Continuous pressure conditions.

C. Atmospheric conditions.

D. Continuous flow pressure conditions.

Barometric loop shall only be utilized as an:

A. Atmospheric type vacuum breaker.

B. Pressure type atmospheric breaker.

C. Pressure reducing type back-flow preventer.

D. A & B.

Pipe-applied atmospheric-type vacuum breakers and hose connection vacuum breakers, these devices shall operate under normal atmospheric pressure when the critical level is:

A. Checked and labeled.

B. Installed at the required height.

C. above atmospheric pressure.

D. At atmospheric pressure.

Double check-valve assemblies shall be capable of operating under continuous pressure conditions. These devices shall be tested;

A. Monthly by a licensed plumber.

B. Semi-annual by a licensed plumber.

C. Annually by a certified tester.

D. Every two years.

access shall be provided to back-flow preventers as specified by:

A. The approved plans.

B. The department of Buildings.

C. The D.E.P.

D. The installation instructions of the approved manufacturer.

Openings and outlets equipped for hose connection shall be protected by:

A. Means other than an air gap.

B. By an air break.

C. By an air gap.

D. By back-flow.

Openings and outlets shall be protected by atmospheric-type or pressure-type vacuum breakers. The critical level f the vacuum breaker shall be set a minimum of:

A. 2".

B. 4".

C. 6".

D. 8".

Vacuum breakers shall not be installed under exhaust hoods or similar locations that will contain toxic fumes or vapors. Pipe-applied vacuum breakers shall be installed not less than ... above the flood level rim of the fixture, receptor or device served:

A. 6".

B. 4".

C. 2".

D. 1".

Approved deck-mounted or equipment-mounted vacuum breakers and faucets with integral atmospheric or spill proof vacuum breakers shall be installed in accordance with the manufacturer's instructions and requirements for labeling with the critical level not less than ... above the flood level rim:

A. 1'.

B. 2".

C. 4".

D. 6".

Sill-cocks, hose bibs, wall hydrants and other openings with a hose connection shall be protected by an atmospheric-type or pressure-type vacuum breaker or a ... attached hose connection vacuum breaker:

A. Potable.

B. Permanently.

C. Fixed-type.

D. Open-type.

All hospitals shall have:

A. 1 water service.

B. 2 water services.

C. 3 water services.

D. 4 mains.

Water heater and boiler drain valves that are provided with hose connections threads and that are intended only for tank or vessel draining:

A. Must have a required atmospheric -type vacuum breaker.

B. Must have a required pressure-type vacuum breaker.

C. Vacuum breaker is not required.

D. A & B.

Water supply valves intended for connection of clothes washing machines where back-flow prevention is otherwise provided or is integral with the machine:

A. An additional atmospheric vacuum breaker is required.

B. An additional pressure-type vacuum breaker is required.

C. Vacuum breaker is not required.

D. A & B.

The water supply connection to carbonated beverage dispenses (carbon dioxide) shall be protected against by back-flow by a back-flow preventer conforming to ASSE 1022 or by an:

A. Air gap.

B. Air break.

C. Double check valve.

D. RPZ.

The potable supply to the boiler shall be equipped with a back-flow preventer with:

A. An air gap.

B. An intermediate atmospheric vent.

C. Double check valve.

D. RPZ.

The potable water supply to automatic fire sprinkler and standpipe systems shall be protected against back-flow by an:

A. Double check valve assembly.

B. Reduced pressure principal back-flow preventer.

C. Intermediate atmospheric vent.

D. A, B & C.

Where systems under continuous pressure contain chemical additives or antifreeze. or where systems are connected to a non-potable secondary water supply, the potable water supply shall be protected:

A. Atmospheric type vacuum breaker.

B. Pressure-type vacuum breaker.

C. Reduced pressure principal back-flow preventer.

D. Double check valve.

In a health plumbing when a trap is used to collect condensate, a water supply shall be provided for cleaning, flushing and resealing the condensate trap, and the trap shall discharge:

A. Through an air gap.

B. Through an air break.

C. Vacuum breaker.

D.Check valve.

The discharge from a reverse osmosis drinking water treatment unit shall enter the drainage system through an:

A. Air break.

B. Vacuum breaker.

C. Air gap.

D. Air valve.

Cross connections between a private water supply and a potable public supply:

A. Allowed when approved.

B. Shall be prohibited.

C. Approved when an RPZ is installed for protection purposes.

D. A & C.