Plumbing - Session 12 Part 2

Stand pipe receptor for automatic clothes washers shall be individually trapped and vented. The maximum distance the receptor shall be above the trap weir is:

A. 18 in.

B. 30 in.

C. 36 in.

D. 42 in.

The minimum spacing interval for corporation stops (taps) and wet connections for both 3/4" and 1" shall be:

A. 6 in.

B. 12 in.

C. 18 in.

D. 24 in.

Pipping to a blow-off condensing tank shall connect:

A. As an indirect waste.

B. When below the crown level of the public sewer, may discharge into a dry well.

C. Behind a leader trap.

D. When trapped, into the building (house) drain.

The action of an air chamber is caused by:

A. Compressed air.

B. Vacuum.

C. Siphon.

D. Helium.

In a plumbing installation a one inch globe valve is installed backwards. Describe what change will occur in comparison of pressure when water is being used on the fixture side of this valve:

A. More pressure.

B. Less pressure.

C. Pressure remains the same.

D. Water cannot pass through the valve.

The smallest size trap and service permitted by the Department of Environmental Protection (DEP) is:

A. 5/8" and 3/4".

B. 5/8" and 1".

C. 1" and 1".

D. 3/4" and 1".

With respect of hot water storage tank made of galvanized steel compared with those made of copper, it is fact that:

A. The former will not corrode as rapidly as the latter.

B. Copper tanks tend to collapse when the pressure within or less than 14.7 psi atmospheric pressure.

C. The use of copper tanks for hot water usually cause the staining of the clothes and plumbing fixtures.

D. For the same wall thickness the later is generally stronger than the former.

Which item is used to clear a natural gas line:

A. Nitrogen.

B. Argon.

C. Hydrogen.

D. Oxygen.

The melting point for silver brazing should be:

A. 410*F.

B. 960*F.

C. 1000*F.

D. 1410*F.

Clean-out openings shall not be utilized for:

A. Rodding purposes.

B. The installation of new fixtures.

C. Access of the piping served.

D. Any purpose.

Clean-outs shall be the same nominal size as the pipe they serve up to:

A. 2".

B. 3".

C. 4".

D. 6".

The minimum size clean-outs for pipe larger than 4 inches shall be:

A. 4".

B. 5".

C. 6".

D. 8".

"P" trap connections with slip joints or ground joint connections, or stack clean-outs that are not more than one pipe diameter:

A. Larger than the drain served, shall be permitted.

B. Smaller than the drain served, shall be permitted.

C. A & B.

D. Will not permitted.

Clean-outs on 6-inch and smaller pipes shall be provided with a clearance of not less than ... for rodding:

A. 12".

B. 18".

C. 24".

D. 30".

Clean-outs on 8" and larger pipes shall be provided with a clearance of not less than ... for rodding:

A. 12".

B. 24".

C. 36".

D. 48".

All clean-outs shall be:

A. Accessible.

B. Be seen.

C. Be covered over.

D. Need access only when sizing soil or waste pipe.

Drainage fixture unit values as designated, give the relative load weight of different kinds of fixtures that shall be employed in:

A. Designing the flow of water.

B. Estimating the total load carried by a soil or waste pipe.

C. Estimating the total load carried by a soil or waste pipe for which the permissible load is given in terms of fixture units.

D. Needed only when sizing soil or waste pipe.

The drainage fixture unit value as a load factor for an automatic clothes washers, commercial:

A. 1.

B. 2.

C. 3.

D. 4.

The drainage fixture unit value as a load factor for an automatic clothes washers, residential:

A. 1.

B. 2.

C. 3.

D. 4.

The drainage fixture unit value as a load factor for a bathroom group (1.6 GPM water closet):

A. 2.

B. 4.

C. 5.

D. 6.

The drainage fixture unit value as a load factor for a bathroom group (water closet flushing greater than 1.6 GPM):

A. 2.

B. 4.

C. 5.

D. 6.

The drainage fixture unit value as a load factor for a bathtub (with or without overhead shower or whirlpool attachments:

A. 1.

B. 2.

C. 3.

D. 4.

The drainage fixture unit value as a load factor for a drinking fountain:

A. 1/2.

B. 1.

C. 1-1/2.

D. 2.

Minimum size of a trap (inches) for a bidet is:

A. 2.

B. 1-1/2.

C. 1-1/4.

D. 1.

Minimum size of a trap (inches) for a dental lavatory is:

A. 2.

B. 1-1/2.

C. 1-1/4.

D. 1.

Minimum size of a trap (inches) for a dental unit or cuspidor is:

A. 2.

B. 1-1/2.

C. 1-1/4.

D. 1.

Minimum size of a trap (inches) for a drinking fountain is:

A. 2.

B. 1-1/2.

C. 1-1/4.

D. 1.

Minimum size of a trap (inches) for a lavatory is:

A. 2.

B. 1-1/2.

C. 1-1//4.

D. 1.

Minimum size of a trap (inches) for a combination sink and tray is:

A. 2.

B. 1-1/2.

C. 1-1//4.

D. 1.

Minimum size of a trap (inches) for floor drain is:

A. 1-1/2".

B. 2".

C. 3".

D. 4".

Minimum size of a trap (inches) for a kitchen sink, domestic is:

A. 1-1/2".

B. 2".

C. 3".

D. 4".

Minimum size of a trap (inches) for a shower is:

A. 1/14".

B. 1-1/2".

C. 2".

D. 2-1/2".

The drainage fixture unit value of a load factor for a water closet, private (1.6 GPM):

A. 3.

B. 4.

C. 5.

D. 6.

The drainage fixture unit value of a load factor for a water closet, flushometer tank, public pr private is:

A. 3.

B. 4.

C. 5.

D. 6.

A shower head over a bathtub or whirlpool bathtub attachment:

A. Does not increase drainage fixture unit value.

B. Does increase drainage fixture unit value.

C. Increase drainage fixture unit value.when installed in commercial buildings.

D. Reduces drainage fixture unit value.when installed in nursing homes for children.

Trap size shall be consistent with the:

A. Fixture inlet size.

B. Size of the fixture.

C. Fixture outlet size.

D. Drainage fixture unit of the fixture.

For fixture added to a dwelling unit bathroom group:

A. The DFU remains the same.

B. Add the drainage fixture unit value of those additional fixtures to the bathroom group fixture count.

C. Add only one DFU value for each fixture added to the group.

D. Add only drainage fixture unit value to the group regardless how many fixtures have been added.

The drainage fixture unit load of an indirect waste receptor receiving the discharge of indirectly connected fixtures shall be:

A. Sum of the drainage fixture unit values of the fixtures that discharge to the receptor.

B. But not less than the drainage fixture unit value given for the indirect waste receptor.

C. A & B.

D. The fixture unit values of the fixture receiving the load.

Fixtures not listed in table 709.1 shall have a drainage fixture unit load based on the outlet size of the fixture in accordance with table 709.2. The minimum trap size for unlisted fixtures shall be the size of the drainage outlet but not less than .25 inches, 1-1/4 inches. Fill in the DFU value:

Table 709.2

Drainage fixture units for fixture drainage or traps.

Fixture drain or trap size (inches) - drainage fixture unit value.

1-1/4 -

1-1/2 -

2 -

2-1/2 -

3 -

4 -

Drainage fixture unit values for continuous and semi-continuous flow into a drainage system shall be computed on the bases that 1 GPM of flow is equivalent to:

A. One fixture unit.

B. One and one-half fixture unit.

C. Two fixture unit.

D. Three fixture unit

Horizontal stack offsets shall be sized as required for:

A. Soil or waste stacks.

B. Horizontal drains.

C. Building drains.

D. Vertical stacks.

Vertical stack offsets shall be as required for:

A. House drains.

B. Horizontal lines.

C. Branch lines.

D. Straight stacks.

What is the minimum size of any building drain serving a water closet:

A. 2".

B. 2-1/2".

C. 3".

D. 4".

stack shall be sized based on the total accumulated connected load at each story or:

A. Branch inlet.

B. Branch outlet.

C. Branch interval.

D. Story height.

When sizing soil or waste stacks and as the total accumulated connected load decreases stacks:

A. Are permitted to the reduced in size.

B. Are not permitted to the reduced in size.

C. Must maintain one size unrestricted.

D. Must increase in size one diameter.

Stack diameters shall not be reduced to:

A. More than one-half diameter.

B. Less than one-half of the diameter of the largest stack size required.

C. More than twice the diameter.

D. Any size.

Sizing load of soil or waste stacks are based on:

A. Design criteria.

B. Architecture.

C. Engineers.

D. Plumbing inspector.

If a horizontal branch connects to the stack within two feet above or below a vertical stack offset, and the offset is located more than four branch intervals below the top of the stack, the offset shall be vented in accordance with Section PC 915 the:

A. The offset shall be vented by venting the upper section of drainage stack and the lower section of the drainage stack.

B. The upper section of the drainage stack shall be vented as a separate stack with a vent stack connection installed in accordance with section 903.4. The offset shall be considered the base of the stack.

C. The lower section of the drainage stack shall be vented by a yoke vent connection between the offset and the next lower horizontal branch. The Yoke vent connection shall be permitted to be a vertical extension of the drainage stack. The size of the yoke vent and connection shall be a minimum of the size required for the vent stack of the drainage stack.

D. A, B & C.

Vents for vertical offsets required by section 711.1 "horizontal branch connections above or below vertical stack offsets", shall not be required where the stack and its offset are sized as a:

A. Branch drain.

B. Building drain Table 710.1 (10, column 5, 1/2" per foot.

C. House sewer.

D. Building sewer.

Where a horizontal stack offset is located more than four branch intervals below the top of the stack, a horizontal branch shall not connect within the horizontal stack offset or within ... above or below such offset:

A. 12".

B. 18".

C. 2'.

D. 2.5'.

A stack with a horizontal offset located more than four branch intervals below the top of the stack shall be vented in accordance with section PC 915 and sized as follows:

A. The portion of the stack above the offset shall be sized as for a vertical stack based on the total number of drainage fixture units above the offset.

B. The offset shall be sized in accordance with section 710.1.1.

C. The portion of the stack below the offset shall be sized as for the offset or based on the total number of drainage fixture units on the entire stack, whichever is larger (see table 710.1920, Column 4), total for stack greater than three branch intervals.

D. A, B & C.

Vents for horizontal stack offsets required by section 711.3 shall not be required where the stack and its offset are:

A. One pipe size larger than required for a building drain (see table 710.1 (1), column 5).

B. The entire stack and offset are not less in cross-section area than that required for a straight stack plus the area of an offset vent as provided for in section PC 915.

C. Omission of offset vents in accordance with this section shall not constitute approval of horizontal branch connections within the offset or within 2 feet above or below the offset.

D. A, B & C.

Where a vertical offset occurs in a soil or waste stack below the lowest horizontal branch, change in diameter of the stack because of the offset shall:

A. Be required.

B. Not be required.

C. Required if the jurisdiction is in Manhattan.

D. Required of one pipe size greater is used.

Omission of offset vents in accordance with this section 711.3.1 shall not constitute approval of horizontal branch connections within the offset or within ... above or below the offset:

A. 2'.

B. 30".

C. 36".

D. 42".

Building sub-drains that cannot be discharged to the sewer by gravity flow shall be discharged into a/n:

A. Open covered pit/basin from which the liquid can be lifted and discharged into the building gravity drainage system.

B. Open covered pit/basin and vented ejector pit/basin from which the liquid can be lifted and discharged into the building gravity drainage system.

C. Tightly covered and vented ejector pit/basin from which the liquid shall be lifted and discharged into the building gravity drainage system by automatic pumping equipment or other approved method.

D. None of the above.

Unless otherwise approved the ejector pits shall be not less than ... in diameter and 4 inches deep:

A. 6".

B. 12".

C. 18".

D. 24".

A check valve and full open valve, located on the discharge side of the check valve, shall be installed in the pump or ejector discharge piping between the pump or ejector and the gravity drainage system:

A. Access shall be provided to such valves.

B. Such valves will be located above the sump cover required by Sec. 712.1.

C. Where the discharge pipe from the ejector is below grade, the valve shall be accessibly located outside the sump below grade in an access pit with a removable access cover.

D. A, B & C.

The ejector pit shall be accessible and located such that all drainage flows into the pit by gravity. The ejector pit shall be constructed of tile, concrete steel, plastic or other approved materials.The pit bottom shall be solid and provide permanent support for the pump. The ejector pit shall be fitted with a gas-tight removable cover adequate to support anticipated loads in the area of use.The ejector pit shall be:

A. Vented.

B. Painted.

C. Laid in poured concrete.

D. Laid in sand.

The ejector pit maximum effluent level, the effluent level control shall be adjusted and maintained to at all times prevent the effluent from rising to within ... of the invert of the gravity drain inlet into the sump:

A. One inch.

B. Two inches.

C. Three inches.

D. Four inches.

A nipple and cap placed in low point in a system of piping to collect condensate and from which condensate is removable:

A. Cap.

B. Plug.

C. Drip.

D. Pipe.

A gas having a moisture and hydrocarbon dew point below any normal temperature to which the gas piping is exposed:

A. Wet gas.

B. Dry gas.

C. Liquid gas.

D. No-liquid gas.

A valve of the plug and barrel type designed for use with gas, and equipped with a lever handle for manual operation and a dial to indicate the percentage of opening:

A. Non-rising gate valve.

B. Globe valve.

C. Firing valve.

D. Butterfly valve.

A device that will automatically shut off the fuel supply to a main burner or group of burners when the means of ignition of such burners becomes inoperative, and when flame failure occurs on the burner or group of burners:

A. Gas valve at the meter.

B. The gas supply distribution valve.

C. Flame safeguard device.

D. Manual control gas valves.

A passage way which a chimney or vent through which gaseous combustion products pass:

A. Chimney pipe.

B. Flue.

C. Pipe liner.

D. Passageway.

A natural gas, manufactured gas, liquefied petroleum gas, hydrogen gas and mixtures of theses gases are:

A. Fuel gas.

B. Non-combustible gas.

C. Liquids.

D. Non-useful gases.

A completely self-contained heating unit that is designed to supply heated air to spaces remote from or adjacent to the appliance location:

A. Radiator.

B. Baseboard heat.

C. Furnace.

D. Radiant heat.

An installation of pipe, valves or fittings installed on a premises o in a building and utilized to convey fuel gas:

A. Gas fuel.

B. Chimney.

C. Duct piping.

D. Gas piping.

A joint made by bolting together a pair of flanged ends:

A. Threaded joint.

B. Soldered joint.

C. Brazed joint.

D. Flanged joint.

A metal-to -metal compression joint in which a conical spread is made on the end of a tube that is compressed by a flare nut against a mating flare:

A. Flanged joint.

B. Soldered joint.

C. Flared joint.

D. Compression joint.

A general form of gas-tight joints obtained by the joining of metal parts through a positive-holding mechanical construction and is not:

A. Flanged joint.

B. Threaded joint.

C. Flared or compression joint.

D. Soldered or brazed joint.

A joint made in thermoset plastic piping by the use of an adhesive substance which forms a continuous bond between the mating surfaces without dissolving either one of them:

A. Plastic adhesive joint.

B. Welded joint.

C. Mechanical joint.

D. Flanged joint.

The individual outlets to gas ranges shall not be less than:

A. 0.50 inches NTP.

B. 1.00 inches NTP.

C. 0.75 inches NTP.

D. 1.25 inches NTP.

Gas piping shall be sized in accordance with:

A. Pipe sizing tables, manufacturer's installation instructions.

B. Pipe size equations.

C. Other approved engineering methods.

D. A, B & C.

No gas distribution piping containing gas shall be run within a building in excess of:

A. 1/2 psig.

B. 3/4 psig.

C. 1 psig.

D. 2 psig.

Underground piping systems shall be installed in minimum depth of:

A. 6".

B. 12".

C. 18".

D. 24".

Gas pressure not exceeding ... psig, is permitted for the following uses: (a) commercial (b) industrial (c) other large volume use in which fuel requirements for boiler room equipment exceed ... cubic feet fuel per hour and such large volume use is supplied through separate gas distribution piping to the boiler room:

A. 1/2 psig, 1000.

B. 3/4 psig, 2000.

C. 1 psig, 3000.

D. 3 psig, 4000.

Threaded pipe may be used at a pressure no greater than 1/2 psig and up to:

A. 2".

B. 3".

C. 4".

D. 5".

All gas piping 4 inches and greater operating at pressure exceeding 3 psi must be:

A. Butt welded, subject to special inspection and radiographed.

B. Butt welded but not subject to special inspection.

C. May be brazed.

D. May be threaded.

Piping installed underground beneath buildings is prohibited except where the piping is encased in a conduit:

A. Of wrought iron or steel pipe designed to withstand superimposed loads.

B. And shall extend into an occupiable portion of the building and, at the point where the conduit terminates in the building.

C. And the space between the conduit and the gas piping shall be sealed to prevent the possible entrance of any gas leak. The conduit shall be designed for the same pressure as the pipe.

D. A, B & C.

Gas outlets that do not connect to appliances shall be:

A. Valved off.

B. Capped gas tight.

C. Not allowed.

D. Connected to the appliance.

When installing piping underground beneath buildings, the conduit that encases the gas pipe shall be designed to extend:

A. Not less than 4" outside the building and shall be vented.

B. The vent terminal shall be outdoors, minimum 18" above grade, not under an opening to building or overhang, and shall be installed as to prevent the entrants of water and insects.

C. T'he conduit shall be prevented from corrosion.

D. A, B & C.

The unthreaded portion of piping outlets shall not extend less than ... through finished ceilings and walls and where extending through floors or outdoor patios and slabs, shall not be less than ... above them. The outlet fitting or piping shall be securely supported. Outlets shall be located in or space where the appliance is installed:

A. 1/2". 1".

B. 3/4", 1-1/4".

C. 1", 2".

D. 1-1/2", 2".

All welded gas distribution and meter piping main and branch supplies to customer equipment operating in excess of 3 psig inside buildings shall be butt welded and:

A. Shall be controlled inspected.

B. Shall be tested and inspected by a department by a department of buildings inspector.

C. Shall be subject to special inspection in accordance with chapter 17 of the N..Y.C. building code.

D. None of the above.

Radiography shall be performed on all butt welds in gas meter and distribution piping operating at pressure exceeding:

A. 1/2 psig within building.

B. 2 psig within building.

C. 3 psig within building.

D. 4 psig within building.

In the event repairs or additions are made after the pressure test:

A. The affected piping shall be tested.

B. No additional testing is required.

C. All the piping shall be retested.

D. All the piping does not have to be tested.

Where new branches are installed in a gas piping system from the point of delivery to new appliances, only a newly installed branches shall be required to be pressure tested, Connection between new piping and existing piping shall be tested with:

A. A non-corrosive leak-detecting fluid.

B. A flammable fluid.

C. An approved leak-detecting method.

D. A & C.

A piping system shall be permitted to be tested as a complete unit or in section. Under no circumstances shall a valve in a line to be used as a bulkhead between gas on one section of the piping system and test medium in series with a valved ... located between these valves:

A. Telltale.

B. Valve.

C. Tee.

D. Pipe.

The test medium shall not be:

A. Air or inert gas.

B. Nitrogen.

C. Carbon dioxide.

D. Oxygen.

Fresh water may be used as the test medium only where the required test pressure:

A. Exceeds 50 psig.

B. Exceeds 100 psig.

C. Less than 100 psig.

D. Exceeds 75 psig.

Equipment that is not to be included in the test shall be either disconnected from the piping or isolated by:

A. Blanks.

B. Blind flanges.

C. Caps.

D. A, B & C.

Distribution pressure up to 1/2 psig. The completed piping is to be tested with a non-mercury gauge at a pressure of 3 psig for a minimum of:

A. 10 minutes.

B. 15 minutes.

C. 30 minutes.

D. 60 minutes.

Distribution pressure of 1/2 psig through 3 psig. The completed piping is to be tested at 50 psig for a minimum of:

A. 15 minutes.

B. 30 minutes.

C. 45 minutes.

D. 80 minutes.

Distribution pressure over 3 psig through 15 psig. The completed piping is to be tested at 100 psig for a minimum of:

A. 15 minutes.

B. 30 minutes.

C. 45 minutes.

D. 60 minutes.

Distribution pressure above 15 psig. The completed piping is to be tested to twice the maximum allowable operating pressurte, but no less than 100 psig for a minimum of:

A. 15 minutes.

B. 30 minutes.

C. 45 minutes.

D. 60 minutes.

Where the test pressure exceeds125 psig, the test pressure shall not exceed a value that produces a hoop stress in the piping greater than a percent of the specified minimum yield strength of the pipe, that percentage shall not be greater than:

A. 25%.

B. 50%.

C. 75%.

D. 90%.

Meter piping shall be pressure tested in accordance with the requirements of the:

A. Serving utility.

B. Building department.

C. Licensed plumber.

D. D.E.P.

Notwithstanding all the rules and regulations of gas piping test, all factory applied coated and wrapped pipe shall be pressure tested at a minimum of:

A. 50 psig.

B. 75 psig.

C. 90 psig.

D. 100 psig.

Fresh water may be used as a test medium only where the required test pressure exceeds:

A. 100 psig.

B. 125 psig.

C. 150 psig.

D. 200 psig.

The holder of the plumbing permit shall give prior written notice to the commissioner that the plumbing work covered by the permit is ready for inspections and tests in at least:

A. 1 days.

B. 2 days.

C. 3 days.

D. 4 days.

Gas piping shall be supported with:

A. Pipe hooks or brackets.

B. Bands of adequate strength and quality.

C. Metal pipe straps, or hangers suitable for the size pipe.

D. A, B & C.

Gas pipe hangers shall be located at intervals so as to prevent:

A. Requirements of MMS SP 5B.

B. The free expansion and contraction of the piping between anchors.

C. All parts of the supporting equipment shall be designed and installed so they will not be disengaged by movement of the supported piping.

D. Undue strains on connected equipment and shall be supported by other piping.

Piping for other than dry gas conditions shall be sloped not less than:

A. 1/4 inch in 15 feet.

B. 1/2 inch in 20 feet.

C. 3/4 inch in 25 feet.

D. 1 inch in 30 feet.

The spacing of supports for steel pipe in gas piping installations, in a horizontal position using nominal pipe size of 1/2 inch and not exceeding:

A. 6 feet.

B. 8 feet.

C. 7 feet.

D. 10 feet.

The of supports for steel pipe in gas piping installations, in a horizontal position using nominal pipe size of 3/4 inch or 1 inch and not exceeding:

A. 6 feet.

B. 8 feet.

C. 7 feet.

D. 10 feet.

Th spacing of supports for steel pipe in gas pipe installation, in a horizontal position using nominal pipe size of -1/4 inch of larger and not exceeding:

A. 6 feet.

B. 7 feet.

C. 10 feet.

D. 12 feet.

The vertical pipe supports for steel pipe in gas piping installations using nominal pipe size of 1-1/4 inches or larger shall be every:

A. 5 feet.

B. 8 feet.

C. 10 feet.

D. Every floor level.

Detecting methods for leakage shall be located by means of an approved:

A. Gas detector.

B. Non-corrosive leak detection fluid.

C. Matches, candles, open flames, or other methods that could provide a source of ignition shall be used.

D. A & B.

Rigid metallic pipe and fitting shall only be used within dwelling units when connecting:

A. Space heaters.

B. Water heaters.

C. Appliances.

D. A & B.

Appliance fuel connector shall have an overall length not to exceed ... except for range and domestic clothes dryer connectors, which shall not exceed ... in length:

A. 3 feet, 6 feet.

B. 2 feet, 5 feet.

C. 18 inches, 4 feet.

D. 12 inches, 3 feet.