purge Pipelines

What is the standard minimum cover on a plastic service when on-site conditions on private property do not permit?

a. 12"

What is the standard cover on plastic services on private property?

a. 18"

When can a mechanical tamp be used on plastic pipe?

a. After the first 12" of backfill

What shall be done before backfilling the ditch?

a. Assure proper depth b. Assure pipe fits the ditch c. All foreign material is removed d. Answer is All of above

If there is an accidental ignition when purging, it is most likely to occur:

a. At the discharge riser.

What is the minimum cooling time for a saddle fusion tee before pressure testing or tapping?

a. Cool to the touch

What does "CTS" on plastic pipe stand for?

a. Copper tubing size

When crossing underground facilities or other utilities within limits of pipe ditch what shall be done?

a. Determine depth by hand excavation

The responsibilities of a qualified person are:

a. Direct and observe non-qualified individuals performing affected tasks. b. Recognize and react to abnormal operating conditions. c. Take immediate action in the event an abnormal operating condition occurs. d. Answer is all of the above.

When bringing the cutter back up after tapping a plastic tee where do you stop the cutter?

a. One thread down from top

Which stab fitting has an OD seal? ( OD, stands for outside)

a. Perfection-Permasert

An abnormal operating condition may result in a hazard to:

a. Persons b. Property c. The environment d. Answer is any of the above

When installing pipe into fitting how shall the pipe ends be prepared?

a. Scarped with pipe scarper or pipe prep tool to necessary depth. b. Cleaned with alcohol wipes. c. Pipe ends cut square. d. answer is all the above

Which of the following condition/s require plastic pipe to be repaired or replaced?

a. Scratches and gouges deeper than 10% of the wall thickness. b. Wrinkle bends c. Over squeezed or rapidly squeezed pipe d. Answer is all the above

What should be done when you are replacing the cap on a plastic tapping tee?

a. Secure the cap onto the tee by hand to avoid over tightening. b. Lubricate the washers or O-rings. c. Soap test for leaks. d.Answer is All of the above

Why do you need to take steps to remove static electricity from plastic pipe when it is being repaired by fusion?

a. Static electricity can be an ignition source.

Why do you roughen the pipe surface prior to saddle/sidewall fusion?

a. To remove oxidation and surface contamination.

What is the purpose of the pipe facer in butt fusion?

a. To square the ends of the pipe.

Which of the following methods can be used to join plastic pipe?

a. Using slab fittings b. butt fusion c. using compression fittings d. Answer is all the above (118 tempry)

Internal pressure may build-up because of not having 100% squeeze-off what must be done to prevent this during the fusion process?

a. Vent b. soapy water poured on pipe c. Ground the fusion control box d. Answer is all the above

Whät shall be done immediately after lowering the pipe into the ditch?

a. Weighted by filling the ditch with backfill material

Which of the following types of damage to plastic pipe requires it to be replaced or repaired?

a. Wrinkle bends b. Stretched pipe caused by excessive tensile forces. c. Over squeezed, rapidly squeezed or rapidly released "squeezed-off" segments of plastic pipe. d. Answer is all the above

Identify the abnormal operating condition(s) from the following:

a: Coating damaged on a buried steel pipeline. b. Natural gas leaking from a pipeline. c. answer is both a & b.

When installing a stab coupling with a wall thickness of .090, what shalll the wall thickness of the pipe be?

b. .090WT

At what percentage of a scratch in the pipe wall thickness, of plastic pipe shall it be repaired or replaced ?

b. 12%

Plastic materials shall not be installed where, they may be exposed to damaging heat of ______ or more?

b. 120 degrees

How long is One Call ticket good for under North Carolina law?

b. 15 days

When an on-site condition does not permit the standard cover, what shall the minimum cover on a main be?

b. 24"

Plastic pipe shall not be stored in direct sunlight for more than______ years from the date of manufacture?

b. 3 years

What is the heater plate surface temperature for butt fusion of Driscoplex 6500 pipe?

b. 400°F - 450°F.

How much bead do you look for in a conventional butt fusion joint?

b. A double bead.

Under the OQ rule individuals may not perform a covered task they have not been qualified on ...unless they have:

b. A qualified individual directing and observing them.

What is the approximate melt bead size for butt fusion of 2" Driscoplex 6500 pipe?

b. About 1/16".

What would be the most likely reason for accidental ignition to occur inside a pipeline that is being purged?

b. An accidental ignition of the purge discharge could flashback into the pipe.

Which stab fitting has an ID seal? (ID, stands for Inside)

b. Contiental-Constab

What is the maximum heating time for Saddle Fusion of 2"IPS Driscoplex 6500 pipe?

b. Do not exceed 35 seconds when hot tapping.

How often are plastic joiners required to be recertified?!

b. Every year

Ditch depth shall allow minimum cover after?

b. Final grade

What shall all pipe and fittings be examined for prior to installation?

b. In good condition and free of visible defects.

How do you properly identify an electrofusion joint?

b. Initials, employee number, date, cool time, and fusión time. ( red or black permanent markers)

What does "IPS" on plastic pipe stand for?

b. Iron pipe size

In case of doubt of fusion process, the fusion cycle can be repeated after?

b. Proper cool time. (Cool to the touch)

What goes on the outlet side of every plastic tapping tee?

b. Protective sleeve

What is a common method for discharging static electricity in an excavation?

b. Soak the area and pipe with soapy water.

What kind of markers should be use to mark the pipeline in a construction area?

b. Temporary markers, flags or stakes.( yellow)

Under the General Statue if we have been given notice to locate our pipeline and we do not respond to that notice or fail to locate that underground utilities what is this saying to the person doing the excavation?

b. That they are free to damage us with no relief on our part.

Why should you thoroughly clean and inspect the pipe ends when joining plastic pipelines with stab fittings?

b. To ensure that there are no excessive scratches or gouges on the pipe surface.

What goes on the flat ring gasket on the inside of the plastic tee cap?

b. Vaseline

What is the standard cover on a plastic service within a street right-of -way?

c. 30"

What is the minimum padding that shall be placed over steel pipe before small rocks from backfill is placed as backfill?

c. 6"

The washer welded to a standard tapping tee rench is;

c. A guide to center the tool in the tapping tee.

A saddle fusion joint shall have what type of appearance?

c. A uniform sized three bead shape.

You are inspecting your saddle fusion joint and it has an unacceptable appearance what do you do?

c. After proper cooling remove the cutter, lout off the top and leave the base in place to reinforce the main.

In saddle fusion, when do you tap the main?

c. After recommended cooling time has elapsed: (40min)

With the conductive method, where do you position the transmitter in relation to the pipeline?

c. As far from the pipe as the connecting cable will allow.

What is the main reason that purging is considered a hazardous activity?

c. Because purging can create a combustible gas-air mixture.

Due to close tolerance or lack of ovality what may be used to drive the fitting upon the pipe?

c. Block of wood and rubber mallet.

When reading bar code on fitting how shall the machine confirm the fitting?

c. By a single tone.

Why is filing or emery cloth NOT acceptable to prepare pipe ends?

c. Can lead to impurities being embedded in the surface.

What is the proper way to dispose of paint cans when empty?

c. Dispose at propen diffinser at local Operation Center.

What is the greatest concern regarding the buildup of electrostatid charges during plastic pipe repair?

c. Electrostatic charges are an ignition source.

After tapping a steel tee how far back up, do you bring the cutter when finished?

c. Even with top of tee (the one steve Welds)

When using innogaz fittings what shall remain on the fitting during fusion process?

c. Fusion well plugs/caps.

If an abnormal operating condition is encountered While performing a covered task, what should you always do?

c. Notify your supervisor or take corrective action to mitigate the condition.

When installing a Perfection Permasert stab fitting what is the proper tool to use to chamfer the pipe?

c. Perfection chamtering tool. (Yellow tool trims the inside)

if the soil is dry, what is the easiest way to improve soil conductivity and lower resistance?

c. Pour some water around the grounding site.

When minimum clearance cannot be obtained when laying pipeline under other utilities or structures what shall be done?

c. Protected from damage of other structures

Which of the following steps should NOT be done when installing and tapping a plastic service line tee?

c. Remove the cutter from the tapping tee

If a lockwing service valve is leaking, what should you do?

c. Replace the service valve.

After installing plastic pipe by insertion method what should you inspect the pipe for when it exits in the bell hole?

c. Scratches, gouges or any indication of damage

According to DOT regulations, an abnormal operating condition is a condition identified by:

c. The operator of the gas system.

When should backfilling from one lide of the ditch be avoided?

c. Where the excavation is wider than the specified width of the ditch

What color do you use to mark natural gas facilities?

c. Yellow

After you have finished installing a new service line, why should it be purged?

c. You should not put a gas pipeline into service if it contains air.

What is the Heating Force for Sidewall fusion of Driscoplex 6500 pipe?

d. 0

What is the Heating Force for Saddle Fusion of Driscoplex 6500 pipe?

d. 0 (25.sec)

When making a repair with an electrofusion repair saddle the defect must not exceed how much on a 4" pipe?

d. 1.5"

What minimum clearance shall be provided when laying pipeline under other utilities or structures?

d. 12"

What is the Bead-Up Force for saddle fusion of Driscoplex 6500 ?

d. 280

Never remove more than _______%% of the wall thickness when removing Contamination from the pipe with paint scraper or pipe prep tool?

d. 3%. (When scraping)

What should the standard cover on plastic or steel mains be?

d. 36"

Under the lavy of North Carolina One Call how many hours or days notification must be given before work can begin?

d. 48 hours (new law, business days)

What is the heater plate surface temperature for sidewall fusion of Driscoplex 6500 pipe? (tAping t)

d. 490 F - 510 F.

What is the heater plate surface temperature for saddle fusion of Driscoplex 6500 pipe?

d. 490°F - 510°F

Why would you use inductive method rather than the conductive method to locate a gas line?

d. Because a direct connection to the pipe is not available.

When using a stab fitting, which of the following steps are necessary to avoid damaging the O-ring seal?

d. Chamfer the ID or OD of the pipe end.

When using a stab fitting, which of the following steps is necessary to avoid damaging the O-ring seal?

d. Chamfer the pipe end.

What is the proper cooling time before pressure testing or tapping a plastic tapping tee?

d. Cool to the touch (40min)

What do you use to roughen the pipe surface prior to saddle/sidewall fusion? (Comes in bag)

d. Emery cloth

A qualified individual:

d. Must recognize and react to abnormal operating conditions.

What is the first priority if you find an abnormal operating condition?

d. Protect people.

The OQ rule requires individuals be evaluatedito verify their qualifications to:

d. Recognize and react to abnormalloperating conditions.

A electrofusion repair saddle would most likely be used when the damage to a section of plastic pipe is:

d. Relatively small, approximately 1½" or less.

Which of these best describes the proper stab depth for Perfection-Permasert stab fittings?

d. Stab depth is always measured and marked from the edge of the fusion bead to end of the fitting body.

Normally, you would NOT purge a pipe segment after:

d. Switching over service from one customer to another.

What is the advantage of the conductive method of line locating?

d. The direct connection helps eliminate signal interference.

What do all abnormal operating conditions have in common?

d. They require effective response.

Why do you abrade/Sand( 5, sec, then.O, 25 sec remoue hester plate Drop Down t and turn Dial to) the surface the pipe and fitting base before saddle fusion?

d. To remove oxidation and surface contamination.

What do you use to abrade the pipe and fitting surfaces with for saddle fusion?

d. Utility Cloth. (Same emery cloth)

At what pressure should plastic tapping tees be tested once they are installed?

100 psig.