Module 15 Re-establishing gas supply

Question 1

If you have not directly worked on an appliance regulation 34 states…

Answer 1

If you know or have reason to believe that the appliance may be a risk to people you should inform the responsible person or, failing that, the transporter

Question 2

If you have worked on an appliance regulation 26 states that you should check 4 things – what are they?

Answer 2

1) Effectiveness of the flue
2) Supply of combustion air
3) Operating pressure and/or heat input
4) Its operation – functioning safely

Question 3

Prior to a tightness test the cooker lid should be…

Answer 3

Opened

Question 4

Prior to purging an installation do you need to do a tightness test?

Answer 4

Yes

Question 5

From a safety perspective why would you purge an installation?

Answer 5

Remove the possibilities of explosive mixtures

Question 6

If you have a U6 meter and the pipework is <= 28mm what is the purge volume

Answer 6

0.01m3

Question 7

How do you calculate the purge volume for a G4 meter with pipe work greater than 28mm?

Answer 7

Meter volume x5 (0.01m3) + IV of pipework & fittings x 1.5

Question 8

What is IV?

Answer 8

Installation volume = Pv + (Pv x 0.1) for fittings

Question 9

If the IV <0.02m3 do you purge to:

a) air
b) flame
c) either

Answer 9

a) air

Question 10

If the IV >0.02m3 do you purge to:

a) air
b) flame
c) either

Answer 10

b) flame