Plumbing - Session 8 Part 2

Unit vents are usually used to vent fixtures:

A. Isolated or individual designed.

B. In every venting designed system.

C. Water closet installation.

D. Fixtures installed back to back.

Which of the following methods of purifying water is not considered completely satisfactory:

A. Calcium and magnesium removal.

B. Aeration.

C. Sand filtration.

D. Precipitation. ```

A local vent:

A. Should be connected to the main vent.

B. Can be used instead of a relief vent.

C. Is not connected to the sanitary vent system.

D. Vent fixtures isolated from main fixture groups.

Water seal trap is effective only when;

A. There is danger of frost.

B. Atmospheric pressure remains constant over area of seal.

C. There is a steady source of water supply available.

D. It is installed at sea level.

Traps that rely on mechanical operation to prevent passage of gasses are:

A. The best designed type traps to use for all occasions.

B. Not to be relied on.

C. As good as any other type of traps.

D. The most widely used type of traps.

Which of the following is not a common cause of loss of trap seal:

A. Wind effect.

B. Evaporation.

C. Back pressure.

D. Siphonage.

Shower trap, vent and waste pipe size are:

A. 1-1/2" trap, 1-1/2" vent, 1-1/2" waste.

B. 1-1/2" trap, 1-1/2" vent, 2" waste.

C. 2" trap, 1-1/2" vent, 2" waste.

D. 3" trap, 1-1/2" vent, 3" waste.

The house drain is 240 feet long, at the house trap the elevation is -3.5" and at the far end elevations equal to +1.5', the pitch on the house drain is:

A. 1/8" per /ft.

B. 1.4" per ft.

C. 3/8 per ft.

D. 1/2 per ft.

The water inlet to a suction tank or roof tank shall be controlled by a:

A. Gate valve.

B. Globe valve.

C. Ball cock.

D. Needle valve.

The water supply to a suction tank or roof tank;the inlet shall be terminated so as to provide an accepted air gap but in no case shall it be less than:

A. 1 in. below the top of the overflow.

B. 2 in. below the top of the overflow.

C. 3 in. below the top of the overflow.

D. 4 in. below the top of the overflow.

A centrifugal pump with a 4 inch suction and a 3 inch discharge, velocity in the discharge pipe id most nearly equal to:

A. 1//2 suction pipe velocity.

B. 3/4 suction pipe velocity.

C. 2 times suction velocity.

D. 3 times suction velocity.

To connect spigot end of a 6" clay pipe to the bell end of cast a iron pipe,you must use a:

A. Double hub.

B. Increaser.

C. Reducing hub.

D. Sleeve.

To measure the pressure of natural gas, you must use a:

A. Altimeter.

B. Meter bar.

C. Hydrometer.

D. Manometer.

An eccentric reducer is used to deep:

A. Same centerline.

B. Same inside bottom.

C. To lower the invert.

D. Reduce velocity.

Water-hammer arrester is required on flush valves for W.C. and urinals:

A. Having a minimum length of 12 inches.

B. A water hammer arrestor, installed as to the manufacturer specification.

C. Having a minimum length of 18 inches.

D. Having a minimum length of 24 inches.

Using an air hose to remove metal chips is:

A. Recommended when less than 30 psi is used.

B. Not recommended.

C. Recommended when you use safety glasses.

D. Recommended.

A common vent is also known as a:

A. Crown vent.

B. Dual vent.

C. Side vent.

D. Yoke vent.

A 4-inch drain pipe fitting not allowed for a 90* stack offset:

A. Combination wye and 1/8 bend.

B. Long sweep.

C. 1/4 bend.

D. Y and 1/8 bend.

Vertical cast iron pipe is supported at its base and:

A. Each story height, but in no case at intervals greater than 12 ft.

B. Each story height, but in no case at intervals greater than 20 ft.

C. Every other story, maximum 20 ft.

D. . Every other story, maximum 25 ft.

A centrifugal pump with a pet cock at the top of the housing is for:

A. Check first stage pressure.

B. Check second stage pressure.

C. Bleed air.

D. Drain impeller for repair.

A hospital fixture that does not require a vapor vent:

A. Pressure sterilizer.

B. Clinical sink.

C. Bed pan washer.

D. Autoclave.

A pump that has a connections water discharge has a fixture unit value that is equal to:

A. Trap size.

B. One f.u. per/g/m.

C. Two f.u. per/g/m.

D. Two f.u. per inch drain diameter.

A gas pipe branch of a riser requires:

A. One elbow swing.

B. With no less than one elbow swing.

C. Gasket union.

D. With no less than a two-elbow swing.

The size of a lavatory outlet shall be at least:

A. 1-1/4".

B. 1-1/2".

C. 2".

D. 3".

The type of materials used for oxygen pipe lines:

A. Galv. steel.

B. Black steel.

C. "M" copper.

D. "K".

A grease interceptor that receives 10 g/p/m of waste water shall have a grease retention of:

A. 5 pound.

B. 10 pound

C. 15 pound.

D. 20 pound.

Oil separators shall have a depth of not less than:

A. 6 inches.

B. 12 inches.

C. 18 inches.

D. 24 inches.

The outlet opening of an oil separator shall have not less that an:

A. 12" water seal.

B. 18" water seal.

C. 24" water seal.

D. 30" water seal.

Where automobiles are serviced oil separators shall have a min. capacity of:

A. 2 cubic ft.

B. 4 cubic ft.

C. 6 cubic ft.

D. 8 cubic ft.

Maximum flow rate and consumption for public lavatory (metering) or fixture fitting:

A. 2.2 GPM at 60 PSI.

B. 0.25 gallon per metering cycle.

C. 0.2 GPM at 60 PSI.

D. 2.5 GPM at 80 PSI.

Maximum flow rate and consumption for a public lavatory (other than metering):

A. 2.2 GPM at 60 PSI

B. 0.25 gallon per metering cycle.

C. 0.5 GPM at 60 PSI.

D. 2.5 GPM at 60 PSI.

Maximum flow rate and consumption for a shower head:

A. 2.2 GPM at 60 PSI.

B. 0.25 gallon per metering cycle.

C. 0.5 GPM at 60 PSI

D. 2.5 GPM at 80 PSI.

Maximum flow rate and consumption or a sink faucet:

A. 2.2 GPM at 60 PSI.

B. 1.0 gallon per flushing cycle.

C. 1.6 gallon per flushing cycle.

D. 3.5 gallon per flushing cycle

Maximum flow rate and consumption for a urinal:

A. 2,2 GPM at 60 PSI.

B. 1.0 gallon per flushing cycle.

C. 1.6 gallon per flushing cycle.

D. 3.5 gallon per flushing cycle.

Maximum flow rate and consumption for water closet (other than metering):

A. 2.2 GPM at 60 PSI.

B. 1.0 GPM at 60 PSI.

C.1.6 gallon per flushing cycle

D.3.5 gallon per flushing cycle

The maximum water consumption rate quantities for plumbing fixtures and fixture fittings shall be in accordance with table 604.4.The one fixture that is not an exception:

A. Blowout design water closets (3.5 gallons) per flushing cycle.

B. Vegetables sprays, service sinks, emergency showers.

C. Clinical sinks (4.5 gallons per flushing cycle).

D. Water closet (1.6 gallons per flushing cycle).

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

A. Minimum pressure available.

B. Maximum pressure available.

C. Existing pressure available.

D. Engineers availability of he pressure.

Where pressure from the street main or other source of supply is insufficient to provide flow pressure at fixture outlets as required under table 604.3 you need:

A. To know the maximum pressure available.

B. A water pressure booster system.

C. To know the minimum pressure available.

D. The type of fixture to be installed.

An approved water pressure reducing valve conforming to ASSE 1003 with strainer shall be installed to reduce the pressure in building water distribution piping whenever the water pressure within a building exceeds:

A. 40 PSI static.

B. 65 PSI.

C. 75 PSI.

D. 85 PSI.

The pressure reducing valve shall be designed to:

A. Remain open to permit uninterrupted water flow in case of valve failure.

B. Remain closed to permit uninterrupted water flow in case of valve failure.

C. Alarm when valve fails.

D. Close when pressure exceed 85 PSI.

All water-pressure reducing valves, regulators and strainers shall be so constructed and installed as to permit repair of removal of parts without breaking a pipeline or removing the valve:

A. Vacuum breaker from the pipeline.

B. Strainer from the pipeline.

C. Check line from the pipeline.

D. Parts from the pipeline.

The flow velocity of the water distribution system shall be controlled to reduce the possibility of:

A. Wear and tear.

B. Noise.

C. Water hammer.

D. Surging.

Water hammer arrestors shall conform to ASSE 1010 and PDI WH201 and shall be installed:

A. Concealed areas.

B. Behind partitions.

C. Accordance with manufacturer's specification.

D. Well ventilated areas.

Hot and cold water manifolds shall be sized with Table 604.10.1 The total gallons per minute is the demand of all outlet supplied; so a 1/2 inch nominal size pipe that produces a velocity of water flow at 8 feet per second will generate a maximum demand of:

A. 2 GPM.

B. 3 GPM.

C. 5 GPM.

D. 11 GPM.

Individual fixture shutoff valves installed at the manifold shall:

A. Be identified.

B. Be a globe valve.

C. Need valves.

D. Check valves.

Water service pipe shall conform to NSF61 and shall conform to one of the standards listed in Table 605.3. The one material not approved:

A. Brass pipe ASTM B43.

B. Copper or copper-alloy tubing (type K).

C. Ductile iron water pipe (cement mortal line).

D. Galvanized steel.

Water distribution pipe shall conform to NSF61 and shall conform to one of the standard listed in table 605.4.The one material not approved:

A. Stainless steel pipe (type 304/304I),

B. A. Stainless steel pipe (type 304/304L),

C. Plastic pipe.

D. Copper and copper-alloy pipe.

Mechanically formed tee fitting, the mechanically extracted outlets shall have a height not less than ... times the thickness of the branch tube wall:

A. One.

B. Two.

C. Three.

D. Four.

In the mechanically formed tee fittings, a full flow assurance is required and branch tube shall not restrict the flow in the run tub:

A. A dimple/depth stop shall be formed in the branch tube to ensure that penetration into the collar is of the correct depth.

B. For inspection purposes, a second dimple shall be placed 0.25 inch above the first dimple.

C. Dimples shall be aligned with the tube.

D. A,B & C.

Mechanically formed tee fitting shall be:

A. 95-5 soldered joints.

B. 50-50 soldered joints.

C. Brazed joints.

D. Compression joints.

Flexible water connectors exposed to continuous pressure shall conform to IAPMO PS 7495 and PAS 4892 shall not exceed:

A. 18".

B. 24".

C. 30".

D. 36".

The following types of joints and connections shall be prohibited:

A. Cement or concrete joints.

B. Solvent cement joints between different types of plastics.

C. Saddle-type fittings.

D. A, B & C.

Joints between brass pipe or fitting shall be:

A. Welded.

B. Brazed.

C. Soft solder 95-5.

D. Compression fittings.

Threaded joints shall conform to ASME B1.20 pipe-joint compound or tape shall be applied on the:

A. Male treads only.

B. Male treads sometimes.

C. Female threads.

D. B &C.

Solder joints shall be made in accordance with the methods of ASTM B828. All cut tube ends:

A. Shall be reamed to the full size inside diameter of the tube end.

B. Shall be reamed to the full size outside diameter of the tube end.

C. Shall be reamed to remove only burrs.

D. Does not need to be reamed.

The joining of water supply piping shall made with lead free solder and fluxes "lead free" mean a chemical composition equal to or less than ... percent lead:

A. 0.1

B. 0.2

C. 0.3

D. 0.4.

All welded joint surfaces shall be cleaned. The joint shall be welded:

A. Autogenously.

B. With an approved filler metal as referenced in ASTM A 312.

C. Using brazed filler metal.

D. A & B.

Joints between different piping materials shall be made with a:

A. Mechanical joint of compression type.

B. Mechanical joint of the mechanical-sealing type.

C. Joints shall be installed in accordance with the manufacture's instruction.

D. A, B & C.

Joints between copper and copper-alloy fitting and galvanized steel. Shall be made with a:

A. Brass fitting.

B. Dielectric fitting.

C. A & B.

D. None of the above.

Joints between stainless steel and different piping materials shall be made:

A. With mechanical joint of the compression type.

B. With mechanical sealing type.

C. With dielectric fitting.

D. A. B & C.

Full-open shall be installed in the following locations of the building water distribution system on the:

A. Building water service pipe from the public water supply near the curb.

B. Water distribution supply pipe at the entrance into the structure.

C. Discharge side of every water meter.

D. A, B & C.

Where the water pressure in the public water main or individual water supply is insufficient to supply the minimum pressure and quantities specified by this code, the supply shall be supplemented. The one that is incorrect:

A. Elevated water tank.

B. Portable emergency generator.

C. Hydro-pneumatic pressure booster system.

D. Water pressure booster pump.

Each gravity or suction water supply shall be provided with:

A. Guarantee.

B. Locked cover.

C. Overflow.

D. Emergency bell.

All water supply tanks shall be covered to keep out unauthorized persons, dirt and vermin. The covers of gravity tanks shall be:

A. Made of wood.

B. Shall be vented with a return bend vent pipe with an of not less than the area of the down-feed riser pipe.

C. The vent shall be screened with a corrosion resistant screen of not less than 16 by 20 mesh per inch.

D. B & C.

The overflow outlet of a gravity or suction water supply tank shall discharge within ... of a roof or roof drain or over an open water supplied fixture:

A. 6".

B. 8".

C. 10".

D. 12".

Th e overflow discharge of gravity or suction water supply tank shall be proved with durable screening with openings of not less more than:

A. 1/16 inch.

B. 1/8 inch.

C. 1/4 inch.

D. 3/8 inch.

Water inlets to gravity house tanks shall be controlled by:

A. Gate valve.

B. Full bore opening valve.

C. Ball cock.

D. Check valve.

The air gap provided for the inlet supply to a gravity house tank shall be terminated so as to provide an accepted air gap but in no case shall be less than ... above the top of the overflow:

A. 2".

B. 4".

C. 6".

D. 8".

The outlet from the gravity tank to the water distribution system shall be equipped with a strainer located at least ... above the tank bottom to prevent solids from entering the piping system:

A. 2".

B. 4".

C. 6".

D. 8".

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 ... on the main cold water down-supply to prevent backflow of water into the roof tank:

A. Check valve.

B. Gate valve.

C. Alarm valve.

D. Double gate and ball valve.

Each house gravity tank, tank compartment shall be provided, at its lowest point, with a valved pipe to permit emptying the tank.

The drain pipe shall discharge as required for the overflow pipe, and shall at least … in diameter.

A. 2".

B. 3".

C. 4".

D. 5".

Potable water gravity tanks or potable water pressure tanks shall not be located directly under any:

A. Roof area.

B. Cellar area.

C. Soil or waste piping.

D. Basement area.

The garvity house supply tank shall be built of:

A. Wood.

B. Steel.

C. Equivalent materials of approved type.

D. A, B & C.

Steel gravity house supply tanks shall:

A. Not be painted.

B. Painted both inside and outside.

C. Painted only on the outside.

D. Painted only on the inside.

If gravity house supply tank with a dividing partition is installed, the total capacity of the combined compartments shall be considered as the:

A. Capacity of a single tank for the purpose of determining storage capacities of the tank.

B.

A. Capacity of a dual tank for the purpose of determining storage capacities of the tank.

C. Full amount used for standpipe and sprinkler.

D. Full amount used for domestic water and sprinkler.

Water tanks shall be cleaned and painted in accordance with the following :

A. 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 or painted on the inside with any materials that will have a toxic or otherwise objectionable effect on the potability of the water supply when the tank is put into service.

B. No lead paint shall be used.

C. The water supply connections to and from a tank shall be disconnected or plugged while the tank is being cleaned or painted to prevent any foreign fluid substance from entering the distribution piping.

D. A, B & C.

Where the air in water supply tank (when cleaning the tank) may be insufficient to sustain human life, or may contain any injurious gas, adequate measures shall be taken:

A. To replace the workers.

B. For the protection of the workers.

C. To add 30% additional oxygen.

D. To add 35% additional oxygen

When cleaning water tanks, after the tank has be changed or painted, it shall be disinfected according to the following procedure before it is put back in service.The underside of the top, the bottom, and the wall shall be washed with a hypochlorite (chlorine) solution containing ... or more parts per million of available chlorine. The tank shall be filled with water to which hypochlorite solution is added the filling in sufficient quantity so that the treated water in the tank will contain at least ... parts per million of available chlorine. The chlorinated water shall be allowed to remain in the tank for ... hours. Finally the tank shall be drained completely before refilling. House and suction tanks shall be drained and cleaned at least ... .

A. 100,10,2, once a year.

B. . 100,10,2, every 6 months.

C. . 10,100,2, every 2 years.

D. . 2,100,10, every month.

A low-pressure cutoff shall be installed on all booster pumps in a water pressure booster system to prevent creation of a vacuum of negative pressure on the suction side of the pump when a positive pressure ... or less occurs on the suction side of the pump"

A. 7 PSI.

B. 10 PSI.

C. 11 PSI.

D. 12 PSI,