Maintenance of small gas Utilities & Decommission & disconnection of appliances

Question 1

A person who finds any appliance or gas equipment beyond repair or in an unsafe condition must what

Answer 1

place the appliance or gas equipment out of service, and
promptly notify a safety officer of its condition and location.

Question 2

What do you do if you verbally commission an appliance

Answer 2

promptly confirmed by a written statement setting out the facts.

Question 3

If a replacement appliance is planned to be installed what should be done

Answer 3

Lock off gas and electrical
Cap and plug

Question 4

If a decommissioned appliance is not going to be replaced what do you do

Answer 4

removal of the electrical, gas, water, venting, etc.
Gas line capped/plugged and purged

Question 5

What do you do for Water and/or Steam Connections if the appliance is being replaced

Answer 5

Make sure any valves are blanked and locked out if the boiler is being replaced.

Question 6

What do you do for Water and/or Steam Connections if the appliance is not being replaced

Answer 6

The piping should be completely removed if the boiler is not being replaced.

Question 7

What do you do with the venting and ducting if the unit is not being replaced

Answer 7

Removed and capped

Question 8

What do you do with ancillary equipment and accessories if unit if decommissioned

Answer 8

Any ancillary equipment and accessories should be isolated and removed for a decommissioned appliance.

Question 9

What sheet is needed for removal of hazardous materials

Answer 9

Safety Data Sheet

Question 10

If the class location of a section of a pipeline changes to a higher designation that has a more stringent location factor, the company shall

Answer 10

within six months after the change, submit the proposed plan to deal with the change to the Regulator.

Question 11

If a company proposes a change of service or an increase in the maximum operating pressure for the pipeline, the company shall submit what

Answer 11

an application for the change or increase to the Commission.

Question 12

If there are any changes to a piping system that include relocating or replacing any piping, monitoring/test station, or compressor station what should be done

Answer 12

A detailed plan created
Maps and drawings should also accompany any plan that shows the new location of any of the above

Question 13

What is a common method used in various industries that uses a low electrical current to prevent corrosion of metal structures

Answer 13

Cathodic protection

Question 14

what is the first line of defence against corrosion

Answer 14

external protective coating

Question 15

How does protective coating work

Answer 15

physically isolate a reactive material, such as steel, from the electrolyte, such as the soil surrounding it

Question 16

How is the pipe coating selected and by who

Answer 16

Coatings shall be selected after a careful analysis of the specific characteristics of each piping system to be coated by competent personnel

Question 17

Which system does not require an external power source

Answer 17

Galvanic Anode Systems

Question 18

How are Galvanic Anode rods connected to piping system

Answer 18

Insulated wiring

Question 19

What material are Anode rods made of

Answer 19

Magnesium

Question 20

What back fill will enhance performance and prevent passivation of the galvanic anodes.

Answer 20

a special low-resistivity chemical backfill consisting of gypsum, bentonite and sodium sulfate

Question 21

Impressed current systems consist of what

Answer 21

an external direct current source connected to impressed current anodes and the piping system by insulated cables.

Question 22

in Impressed Current Systems what are the anodes connected to

Answer 22

The anodes are connected to the positive terminal of the direct current source.

Question 23

Direct current sources for impressed current systems

Answer 23

Rectifiers powered by alternating current supplied by an electrical utility
Generators
Solar energy sources
Thermoelectric generators
Fuel cells
Batteries

Question 24

Warning signs near the direct current source and cables shall be prepared in accordance with?

Answer 24

all applicable regulations, codes, including The Canadian Electrical Code, Part I (CSA Standard C22.1, Section 80 – Cathodic Protection)

Question 25

What should the back fill be made of

Answer 25

coke (metallurgical, petroleum, or graphite

Question 26

Why would venting be required out of back fill

Answer 26

to avoid possible detrimental effects of entrapped anodic reaction gases (e.g. in deep vertical ground beds).

Question 27

Why are test stations provided

Answer 27

to ensure effective testing or monitoring of cathodic protection performance

Question 28

Piping system locations subject to hazardous induced AC voltages that have been identified by test results shall have what

Answer 28

shall have test stations with dead front construction

Question 29

Wire to wire, or cable to cable connections are typically what

Answer 29

made with split bolts or positive compression crimps coated to maintain the integrity of the wiring insulation system

Question 30

Methods to connect copper conductors to steel and other ferrous pressure piping

Answer 30

thermite welding, pin brazing, and mechanical means.

Question 31

Methods to connect aluminum conductors to aluminum piping systems

Answer 31

high energy joining, welding and mechanical means.

Question 32

Methods to connect copper conductors to copper piping systems

Answer 32

arc welding (TIG, MIG, shielded metal), electrical resistance welding, brazing, soldering and mechanical means.

Question 33

The preferred method of inspection

Answer 33

holiday detector

Question 34

How soon after piping system installed should the initial survey be performed

Answer 34

Initial survey shall be performed as soon as practicable, but no more than 12 months after piping system installation

Question 34

When should all impressed current facilities should be inspected and maintained

Answer 34

Once per year

Question 35

When problem is found how soon should it be fixed

Answer 35

As soon as practically possible

Question 36

In-line inspection tools are used to detect

Answer 36

areas of metal loss by using magnetic flux leakage, ultrasonic and eddy current techniques

Question 37

Whenever piping is exposed, it should be visually inspected for

Answer 37

both condition of the external coating and evidence of corrosion

Question 38

whenever the piping is exposed in areas known to be susceptible to stress corrosion cracking what should be done

Answer 38

an examination for the presence of SCC should be considered

Question 39

When should a company notify of any incident relating to the construction, operation or abandonment of its pipeline

Answer 39

the company shall immediately notify the Regulator and shall submit a preliminary and detailed incident report to the Regulator as soon as is practicable.

Question 40

When does a company report deactivation and whats included on the report

Answer 40

after 12 months and reason why it was deactivated