Plumbing - Session 10 Part 1

All plumbing inspections shall be performed at the sole cost and expense of the:

A. Holder of the permit.

B. Licensed Master Plumber.

C. Owner.

D. Builder.

All plumbing system piping shall be tested with either water or, or for piping systems other than ... , by air:

A. Cast iron.

B. Copper.

C. Stainless steel.

D. Plastic.

All plumbing tests shall be made by:

A. The registered engineer.

B. The permit holder.

C. General contractor.

D. Builder.

The maximum gas demand, the volume of gas to be provided to a premises is calculated in:

A. Cubic inches per hour.

B. Cubic feet per hour.

C. Cubic mater per hour.

D. Liters per hour.

For gas pipe sizing:

A. The totally connected hourly load shall be used as its basis.

B.The totally connected flow on a minute basis.

C. The totally connected daily flow twenty-four hours as its basis.

D. The totally connected weekly flow shall be used at its basis.

Individual outlets to gas ranges shall not be less than:

A. 0.75 inches.

B. 0.625 inches.

C. 0.50 inches.

D. 0.375 inches.

Gas piping shall be sized in accordance with one of the following:

A. Pipe sizing tales or equations with section 402.4.

B. The sizing tables included in a listed piping system’s manufacturer’s installation instruction.

C. Other approved engineering methods.

D. A, B & C.

Pipe size of each section of gas piping of the longest pipe run from the point of delivery to the most remote outlet shall be determined using:

A. Using the shortest run of piping and the load of the section.

B. Using the longest run of piping and the load of the section.

C. Calculating the total use of gas on the complete pipe.

D. Cast iron, copper pipe, brass pipe, aluminum-alloy pipe and metallic tubing.

In the installation of gas piping thread (joint) compounds (pipe dope) shall be resistant to the action of liquefied petroleum gas or to any other chemical constituents of the gases to be conducted through the piping. Use of cotton thread (lamp wick) is:

A. Permitted.

B. Permitted when a defect is found in the threaded joint.

C. Permitted when approved.

D. Prohibited.

Pipe joint not approved when installing gas piping:

A. Threaded.

B. Flanged.

C. Welded.

D. Brazed.

When installing equipment shutoff valves, each appliance shall be provided with a shutoff valve separate from the appliance.

the shutoff valve shall be located in the same room as the appliance, not further than … from the appliance, and shall be installed … from the union, connector or quick disconnect device it serves:

A. 2 feet upstream.

B. 4 feet upstream.

C. 6 feet upstream.

D. 8 feet upstream.

An outside gas service line valve (curb) is required when the gas pressure is:

A. Any pressure.

B. Less than 150 psi.

C. Less than 1/2 psi.

D. More than 3 psi.

Tubing joints and flared gas pipe joints:

A. Will be permitted.

B. Shall not be used.

C. Will be permitted if used indoors.

D. Will be permitted sometimes.

Standard face flanges shall be permitted for use in this fuel gas code. Where 150-pound pressure-rated steel flanges are bolted to class 125 cast-iron flanges, the raised face on steel flanges:

A. Shall be removed.

B. Shall remain.

C. Shall remain with an approved gasket.

D. Remain up to 225 psi.

Materials for gaskets shall be capable of withstanding the design temperature and pressure of the piping system, and the chemical constituents of the gas being conducted, without change to its chemical and physical properties. The effects of fire exposure to the joint shall be considered in choosing the material. Acceptable materials shall not include:

A. Metal or non-asbestos fiber.

B. Aluminum "O" rings.

C. Spiral wound material gaskets.

D. Asbestos hard material.

In fuel gas pipelines, when a flanged joint is opened:

A. Care must be taken not to deform the gasket in any manner, to be reused.

B. The gasket shall be replaced.

C. The gasket may be replaced.

D. The gasket may be replaced with the manufacture’s approved sealant.

Full-face gaskets:

A. Shall be used with all cast-iron flanges.

B. Shall be used in all steel flanges.

C. Shall never be used.

D. Shall only be used when the flange is rated above 250 pounds.

When installing gas fuel piping lines, they shall:

A. Not be installed within a stair enclosure or required exit or exit way.

B. Not be installed in any shaft containing standpipe risers.

C. Not be installed within any space housing a fire pump.

D. A, B & C.

Underground piping, where installed below grade through the outer foundation or basement wall of a building, shall be:

A. Coated by the manufacturer.

B. Schedule 80 pipe or greater.

C. Encased in a protective pipe sleeve.

D. Red leaded and tar coated.

Underground piping, where installed below grade through the outer foundation or basement wall of a building:

A. Shall be fully tarred by the manufacturer.

B. The annular space between the gas piping and the sleeve shall be sealed.

C. The annular space between the gas piping and the sleeve shall be packed with oakum or jute.

D. The annular space between the gas piping and the sleeve shall be filled with bees wax.

Gas pipe branches shall be taken off the riser with not less than a:

A. Double swing .

B. Single swing .

C. Two-elbow swing.

D. An elbow and a "T" joint.

Piping in solid floors shall be laid in:

A. Compacted virgin sand and covered in a manner that will allow access to the piping.

B. Clean earth with no frozen dirt and covered in a manner that will allow access to the piping.

C. Poured concrete.

D. Channels in the floor and covered in a manner that will allow access to the piping.

All gas piping installed outdoors shall be elevated above ground and where installed across roof surfaces, shall be elevated not less than:

A. 1-inch.

B. 1-1./2 inches.

C. 2-inches.

D. 3-1./2 inches.

Metallic pipe exposed to corrosive action, such as soil condition or moisture, shall be protected in an approved manner.

zinc coatings (galvanizing):

A. Shall not be deemed adequate protection for gas piping underground.

B. Zinc coatings (galvanizing) shall be deemed adequate protection for gas piping exposed in exterior locations.

C. Ferrous metals exposed in exterior locations shall not be protected from corrosion.

D. A & B are correct.

Pipe protective coatings and wrappings, in gas piping:

A. Shall be approved for the application and shall be factory applied.

B. Shall be approved for the application and shall be field applied.

C. Shall be approved for the application and under the supervision of a licensed master plumber.

D. Pipe protective coatings and wrappings shall not be used.

Underground gas piping systems shall be installed a minimum depth of:

A. 6-inches.

B. 12-inches.

C. 18-inches.

D. 24-inches.

Gas piping installed underground beneath buildings is prohibited except where the piping os encased in a conduit of wrought iron or steel pipe designed to withstand the superimposed loads.

Such conduit shall extend into an occupiable portion of the building and , at the point where the conduit terminates int he building, the space between the conduit and the gas piping shall be sealed to prevent the possible entrance of any gas leakage. The Conduit shall be designed for the same pressure as the pipe. Such conduit shall extend not less than:

A. 6 inches outside the building and shall be vented.

B. 4 inches outside the building and shall be vented.

C. 2 inches outside the building and shall be vented.

D. 1 inches outside the building and shall be vented.

The unthreaded portion of piping outlets shall extend not less than…

through finished ceilings and walls and where extending through floors or outdoor patios and slabs, shall not be less than … above them.

A. 1-in., 2-in.

B. 2-in., 2-in.

C. 3-in., 1-in.

D. 3-in., 3-in.

No steam or hot water is permitted to discharge into the drainage system at a temperature:

A. Less than 100*F.

B. Above 150*F.

C. Less than 150*F.

D. Above 100*F.

An unknown fixture with a discharge of 15 G.P.M.shall have a D.F.U. value of:

A. 15 D.F.U.

B. 7.5 D.F.U.

C. 8.33 D.F.U.

D. 30 D.F.U.

Suds pressure zone relief vent shall be a minimum of:

A. 1/2 diameter of soil or waste stack with a minimum of 1-1/2-inches.

B. 1/2 diameter of soil or waste stack with a minimum of 2-inches.

C. 3/4 diameter of soil or waste stack with a minimum of 2-inches.

D. 3/4 diameter of soil or waste stack with a minimum of 1-1/2-inches.

The joint most likely to be in the clay sewer pipes for a one family dwelling shall be:

A. Lead and oakum.

B. Hot poured compound.

C. Elastomeric seal.

D. Cement.

Which statement is most nearly correct:

A. Floor flanges for water closets made of cast iron shall be 1/8-inch thick.

B. Flush pies shall be ferrous material 1/8-inch thick.

C. The wall of lead waste traps shall be not less than 0.125 inch.

D. Brass floor flanges shall be a minimum of 1/4-inch thick.

Swimming pool drain shall:

A. Be able to drain a minimum of 3 ft./per/sec.

B. Be able to drain the pool in 8 hours.

C. Be able to self scour the bottom of the pool.

D. Be able to make a vortex action when draining.

Which of the following does not discharge into a waste line :

A. Bathtub.

B. Sink.

C. Urinal.

D. Water closet.

Which of the following may connect to a waste system indirectly:

A. Slop sink.

B. Washtub.

C. Bathtub.

D. Bar & soda fountains.

The most practical type of trap is a:

A. Bottle trap.

B. "P" trap.

C. "S" trap.

D. Mechanical trap.

The proper minimum grades for a horizontal drainage is:

A. 1/16" per ft.

B. 1/8" per ft.

C. 1/4" per ft.

D. A, B & C.

The minimum size of a vent pipe through a roof shall be:

A. 1-1/2".

B. 2".

C. 3".

D. 4".

Lead pipe is seldom used for waste installations because:

A. It is inferior to other materials on this type of work.

B. The cost is to high.

C. It requires the type of mechanical.skill not usually available.

D. It is not adaptable for work under the floor.

Condensation on cold water is due to:

A. Warm atmosphere in contact with cold piping.

B. Lack of oxygen.

C. Failure to provide drips.

D. Poor materials of piping system.

Gate valves are used because:

A. A valve is required to control the water supply of an individual fixture.

B. Full water supply is important.

C. Used on water mains only.

D. Used on riser lines only.

When installing a water supply system it is important that:

A. All vertical risers depend on branches for support.

B. Branches be taken from main at 90 degree angle.

C. all risers shall be installed in the outer.wall.

D. All pipe lines be pitched and to have facilities for draining.

Which material is not practical for use on water supply distribution systems:

A. Brass.

B. Copper.

C. Stainless steel.

D. Block tin.

Water distribution pipe in a cellar is installed and because lf an obstruction, a hoop was made which causes air to accumulate, the most probable problem will be:

A. Increase in pressure.

B. Decrease in pressure.

C. Noisy flow of water.

D. Water hammer.

A pumped supply pumps 600 GPM. What size suction or a surge tank will be required:

A. 5000 gal.

B. 7500 gal.

C. 10,000 gal.

D. 12,000 gal.

Commercial dishwashing machines shall have a wash temperature of most nearly:

A. 95*F-120*F.

B. 200*F-210*F.

C. 180*F-190*F.

D. 140*F-160*F.

On a wiped waste line the minimum thickness of the solder joint shall be:

A. 3/4".

B. 1/16".

C. 3/8".

D. 1/4".

A fouyr inch stack connecting to a four inch house drain should not be connected:

A. Combination Y & 1/8 bend.

B. Long turn sweep.

C. Long turn tee Y.

D. A quarter bend.

Except as permitted under certain conditions, the underground water service pipe and the building house sewer shall be horizontally set at least:

A. 5 ft.

B. 8 ft.

C. 10 ft.

D. 12 ft.

when functioning properly the water in an air chamber that was installed on a water supply system equipped with quick closing valves:

A. Displaces the air.

B. Compresses the air.

C. Absorbs the air.

D. Replaces the air.

In the installation of a water service, a permit for a sidewalk opening shall be obtained from the Department of:

A. Public works (PW).

B. Buildings (DOB).

C. Water supply (WS).

D. Transportation (DOT).

TDhe size of service pipes to supply a premises shall be based upon the water demand load of the premises as determined by "fixture units". "Fixture units" shall conform to the requirements of the Department of:

A. Environmental Protection (DEP).

B. Buildings (DOT).

C. Environmental Protection (DEP).

D. Water supply.(WS).

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

A. Fire (FD).

B. Transportation (DOT).

C. Environmental Protection (DEP).

D. Buildings.

The water service may be placed in the same trench with the building (house) sewer and building (house) drain under which of the following conditions:

A. The sewer is of Cast-iron or Ductile iron pipe.

B. Concrete pipe or Copper pr copper-alloy tubing (K or L).

C. Stainless steel drain systems type 301 and 316L or Vitrified clay pipe.

D. A. B & C.

Each gooseneck made by an offset swing joint shall have a total length of most nearly (no allowance for fittings):

A. 2 ft.

B. 3 ft.

C. 4 ft.

D. 6 ft.

When installing a water service pipe a permit is not required to be obtained by the Department of:

A. Environmental Protection (DEP).

B. Transportation.

C. Buildings.

D. DOT.

Which one statement is most correct:

A. All driven corporation stops, when abandoned, shall be replaced by plugs.

B. All wet connections, when abandoned, shall be removed and replaced by plugs.

C. All screw corporation stops, when abandoned, shall be removed and replaced by a plug.

D. When abandoned, the connecting service pipe shall be removed and replaced by plugs.

In providing a potable water service for a given building it is decided that a 2-inch tap and a 2-1/2 inch service are to be used. The minimum goos-neck required for this installation is:

A. 1-1/2 in.

B. 1-3/4 in.

C. 2 in.

D. 2-1/2 in.

Wet connections or other connections to a street main shall be made only by the employees of the :

A. Department of Transportation (DOT).

B. Department of Environmental Protection (DEP).

C. Department of Buildings (DOB).

D. Department of Design and Construction (DDC).

When the tap into the street main is #/4-inch and the water service is 1-inch, the gooseneck shall be most nearly:

A. Same size as the tap.

B. One size larger than the service.

C. Same size as the service.

D. Not required, if service is of cast-iron.

Pressure reducing valves shall be installed whenever the static pressure on fixtures exceed:

A. 50 psi.

B. 65 psi.

C. 75 psi.

D. 85 psi.

The water service may be placed in the same trench with the building house sewer under the following condition:

A. The sewer is of reinforced concrete pipe with lead joints.

B. The top of the water service ,at any point, shall be at least 12 inches above the top of the sanitary sewer line .

C. The required separation distance shall not apply where the bottom of the water service pipe within 5 feet of the sewer is a minimum of 12 inches above the top of the highest point of the sewer and the pipe materials conform to section 703.1.

D. The water service pipe tin the trench is without joints.

Clearance shall be provided around a water service pipe passing through a foundation wall for protection.Clearances between the water service pipe and the wall sleeves shall be a minimum of most nearly:

A. 1-inch larger than the pipe sleeve passing through the wall.

B. 3/4-inch larger than the pipe sleeve passing through the wall.

C. The pipe sleeve shall be two pipe size greater the pipe passing through the wall.

D. The pipe sleeve shall be larger enough so the annular space can be sealed.

A water hammer arrestor installed at individual fixtures:

A. Need not be accessible.

B. Shall be accessible.

C. Are required for loads of less than 5 fixture units.

D. Are required for loads of more than 5 fixture units.

Which of the following statements is not correct:

A. The pressure reducing valve shall be designed to remain open to permit uninterrupted water flow in case of failure.

B. A full-open valve shall be installed, on the entrance to every water supply to a dwelling unit.

C. A full-open valve shall be installed, on the water supply pipe to every hot water heater.

D. A full-open valve shall be installed, on the water supply pipe to each sill-cock.

The one location where the overflow pipe from a house supply shall not be discharged is most nearly:

A. Within 6-inches of a roof or roof drain.

B. Over an open water supplied fixture.

C. Through a check valve into a leader line.

D. Through an air gap into a funnel drain.

Which one shall be installed when a water tank will operate up to a maximum water pressure of 200 psi and up to a maximum temperature of 200*F.

A. T & P valve and vacuum relief valve.

B. Pressure relief valve and a vacuum relief valve.

C. T & P valve only.

D. Pressure relief valve only.

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 that will have toxic or otherwise objectionable effect on the potability of the water supply system when the tank is put into service. No lead paint shall be used. After the tank has been cleaned or painted, it shall be disinfected according to the following procedure before it is put back in service:

A. Under of the top, the bottom, and the walls shall be washed with ...

B. The tank shall be filled with water containing ...

C. The chlorinate water shall be allowed to remain in the tank for ...

D. Finally, the tank shall be ... E. House and suction tanks shall be drained and ...

Water-pressure reducing valve shall be installed whenever the static pressure on fixtures exceed:

A. 50 psi.

B. 65 psi.

C. 75 psi.

D. 85 psi.

A milky appearance coming from the water supply is most likely the result of:

A. Pipe corrosion.

B. Excessive water temperature.

C. Dissolved oxygen.

D. Excessive water velocity. ```

When brass pipe becomes

"pitted" and porous it is essentially due to:

A. An excess of calcium and magnesium in the water.

B. The zinc in the brass is being dissolved.

C. The copper in the brass is being dissolved.

D. The velocity of the water is too excessive.

The fresh air inlet plate to the fresh air inlet pipe serving a 10-inch building 9house0 drain has 3/4-inch and 1/2-inch holes. If there are sixty 1/2-inch holes drilled into the plate, the number of 3/4 holes needed is most nearly:

A. 14.

B. 16.

C. 18.

D. 22.

A galvanized hot water storage tank and a copper storage tank are installed. With respect to each, it can be said:

A. Copper will stain clothes more.

B. Cooper tank could collapse faster.

C. Galvanize tank delivers more hot water.

D. Wall thickness of galvanized tanks is more.

The one valve that offers the greatest resistance to the flow of water is:

A. Gate valve .

B. Needle valve.

C. Globe valve.

D. Plug valve.

Each laboratory outlet provided with a serrated tip or hose end shall be provided with a:

A. Check valve.

B. Vacuum breaker.

C. Air gap.

D. Flow control valve.

Temperature sensing elements of temperature relief valves shall be immersed in the hottest water of a unfired hot water storage heater and within the topmost:

A. 10 in.

B. 12 in.

C. 4 in.

D. 6 in.

The type of valve often used to control small volumes of water is:

A. Globe valve.

B. Butterfly valve.

C. Needle valve.

D. Foot valve.

The intake pipe to a centrifugal pump is four inches and the outlet pipe is three inches. The percentage of the area of outlet pipe to inlet pipe is most nearly:

A. 75%.

B. 50%.

C. 56%.

D. 62-1/2%.

The City is not required to maintain any more pressure other than is required to deliver water to:

A. Roof tank.

B. Basement.

C. Top floor.

D. Upper most fixture.

In making-up threaded brass pipe and fittings, the recommended practice would be to hold the fitting with a:

A. Monkey wrench, turn pipe first by hand into the fitting and tighten with a strap wrench.

B. Stillson wrench, turn pipe first by hand into the fitting and tighten with a friction wrench

C. Pipe vise and then tighten with a stillson wrench.

D. Friction clamp in a vice, turn pipe first by hand into the fitting and tighten with a chain wrench.

One result of improperly installing a gate valve is twisting. This may cause the wedge or disc not to properly seat itself and as a result leak. To avoid this occurrence the valve shall be:

A. Fully closed.

B. Fully opened.

C. Half closed.

D. Slightly opened.

Which of the following statements is not correct:

A. No check valve or shut off valve shall be installed between the safety device and the hot water equipment used.

B. Relief valve discharge pipes shall be the sane size as the pipe discharge connections.

C. Relief outlets may connect to the drainage piping through a check valve.

D. Where a relief valve discharge into a plumbing fixture, a minimum air gap shall be provided.

For the flow predicated on the probable demand of flow in a riser, the velocity of water through the riser should not exceed:

A. 8 ft/sec.

B. 10 ft/sec.

C. 6 ft/sec.

D. 12 ft/sec.

When selecting pipe sizes on a water distribution system, you decide from table 604.3 what is the desirable minimum residual pressure that should be maintained at the:

A. The lowest fixture in the supply system.

B. The highest fixture in the supply system.

C. The average elevation in the system and divide by 2.

D. The average elevation in the system and multiply by 2.

When selecting pipe sizes in a water distribution system, if the highest group of fixtures contains flush valves, the pressure for the group should not be less than:

A. 15 psi flowing.

B. 8 psi flowing.

C. 12 psi flowing.

D. 4 psi flowing.

The water distribution system to be designed for the minimum pressure available taking into consideration pressure fluctuations. The pressure must be selected to guarantee a continuous adequate supply of water, therefore we must select:

A. The lowest pressure in the public main in the winter.

B. The lowest pressure in the public main in the summer.

C. The highest pressure in the public main in the winter

D. The highest pressure in the public main in the summer.

The house control valve shall be placed in the service pipe inside the building, and shall be accessible at all times within:

A. One foot on entry.

B. Two feet of the building wall.

C. At a maximum of three feet of the building wall.

D. At a maximum depth of two feet below the entry floor.

A lavatory is to operate at the minimum pressure permitted. The street water main fluctuates in pressure between 30 psi and 40 psi.

The maximum height above the street main the lavatory may installed is most nearly:

A. 80 ft.

B. 70 ft.

C. 60 ft.

D. 50 ft.

The recommended supply flow of water in gallons per minute to an ordinary lavatory fixture faucet is not less than:

A. 2 0 g/p/m.

B. 2.5 g/p/m.

C. 2.75 g/p/m

D. 3.0 g/p/m

The condition known as water hammer in a water supply system in a building is most likely brought about by:

A. Long straight runs of water supply pipes.

B. Short straight runs with many offsets in the water supply.

C. Quickly stopping the flow of water by sudden closing of a self-closing valve.

D. Varying pressures in the water supply system.

All service pipes shall be installed at a depth of at least … .No more than … below ground, unless a written waiver is obtained from the department:

A. Three and one-half feet, no more than six feet.

B. Four feet, no more than six feet.

C. Three and one-half feet, no more than four feet.

D. Four feet, no more than eight feet.

Durable screening shall be installed in water supply tank overflow pipes and have openings not greater than:

A. 1/8 in.

B. 1/4 in.

C. 3/8 in.

D. 1/2 in.

Which one of the following statements is most nearly correct:

A. An ant-siphon device is most commonly used to prevent the complete loss of the seal of a fixture trap.

B. An ant-siphon device is commonly called a vacuum breaker when it is made part of the water supply system to a plumbing fixture.

C. An anti-siphon device must be located at the overflow level of the fixture which it serves.

D. Plumbing fixture with submerged inlets need not be equipped with anti-siphon device on the water supply thereto.

all water cooled air conditioning or refrigeration system shall:

A. Be connected to a metered supply.

B. Have each unit containing more than 20 pounds of refrigerant.shall be required to have a T & P valve.

C. All systems in excess of 2 tons of rated capacity must be installed with a water conserving device.

D. A, B & C.

A water conserving device shall be installed on all refrigeration systems in excess of:

A. 6 tons.

B. 10 tons.

C. 12 tons.

D. 14 tons.

Flushometers shall be equipped with approved vacuum breakers.The vacuum breaker shall be installed on the discharge side of the flushing valve with the critical level above the overflow rim of the bowl at least:

A. 3 in.

B. 3-1/2 in.

C. 6 in.

D. 8 in.

New or repaired potable water systems shall be purged of deleterious matter and disinfected prior to utilization. The method to be followed shall be that prescribed by the Department of:

A. Health.

B. Environmental Conservation.

C. Buildings.

D. Water supply.

The water service pipe may be placed in the same trench with the building (house) drain provided the bottom of the water service pipe, at all points, shall be above the sanitary sewer at least:

A. 12 inches.

B. 18 inches.

C. 24 inches.

D. 30 inches.

The one source of supplementary water supply that requires an air compressor to properly function is most nearly: A.Reciprocating pressure booster pump system.

B. Water pressure booster pump system.

C. Gravity water supply tank.

D. Hydro-pneumatic pressure booster system.

Of the following items which one is not required on a gravity house tank is:

A. Water inlets to gravity house tanks shall be controlled by a ball cock or other automatic supply valve.

B. The outlet from a gravity tank to the distribution system shall be equipped with a strainer located at least two inches above the tank bottom.

C. The inlet shall be terminated so as to provide an accepted air gap but in no case shall it be less than four inches above the top of the overflow.

D. The drain i[e shall discharge as required for the overflow pipe, and shall be at lest three inches.

An approved means, such a cold water "dip" tub with a hole at the top or a vacuum relief installed in the cold water supply line above the top of the heater or tank, shall be provided to prevent:

A. Spillage of water when tank is overheated.

B. Siphoning of any storage water heater or tank.

C. Prevent back flow into the sanitary drainage system.

D. Siphoning of any storage water into the drainage system.

Bottom fed water heaters and bottom fed tanks connected to water heaters shall have a:

A. 1" drain valves at the bottom of the tank.

B. Shall have 2/3 of the upper portion of the tank filled with compressed air.

C. Vacuum relief valve complying with ANSI Z21.22.

D. Dip tube with a hole within 6" from the bottom.

The minimum size service and gooseneck that is permitted to be installed for a private dwelling is most nearly:

A. 1 inch gooseneck and 1-1/4 inch service.

B. 3/4 inch gooseneck and 1 inch service.

C. 1 inch gooseneck and 3/4 inch service.

D. 1 inch gooseneck and 1 inch service.

Shen the pumps cannot be connected directly to the water service main:

A. A suction (surge) tank shall be installed.

B. An elevated gravity water supply tank shall be installed.

C. A hydro-pneumatic pressure booster system shall be installed.

D. A water pressure booster system shall be installed.

Piping insulation is not required when heat loss in the piping, without insulation in residential buildings:

A. Increases the annual energy requirements of the building.

B. Does not increases the annual energy requirements of the building.

C. When pipe sizes are smaller than 3/4 inch.

D. When pipe sizes are smaller than 1/2 inch.

The design by acceptable practice for commercial buildings utilizing service water heating , piping on return circulation hot water systems shall be insulated with:

A. 1 inch of insulation having a conductivity not exceeding 0.28 Btu per inch/h.ftxft.f.

B. The first 8 feet of piping in no circulating systems served by equipment without integral heat traps shall be insulated with 0.5 inch of material having a conductivity not exceeding 0.28 Btu per inch/h.ftxft.f.

C. 1-1/2 of insulation.

D. A & B.