Gas Assessment questions

• Site conducted

  Select

• Document No.

• Site
  Address

• Conducted on

  Date

• Prepared by

• Location
  Address

• Personnel

• The flammability limits of natural gas are

  3% to 15% gas/air

  3% to 20% gas/air

  5% to 15% gas/air

  5% to 20% gas/ air

• Main equipotential bonding on a gas meter must be...

  Select 300mm of the meter and after any branch off 600mm of the meter and before any branch off 600mm of the meter and after any branch off 300mm of meter and before any branch off

  • 300mm of the meter and after any branch off
  • 600mm of the meter and before any branch off
  • 600mm of the meter and after any branch off
  • 300mm of meter and before any branch off

• When a dwelling has been subject to a gas escape, it is NOT safe for people in that dwelling to do which of the following?

  Select evacuate the premises ventilate the dwelling by opening doors and windows operate electrical switches isolate the gas supply

  • evacuate the premises
  • ventilate the dwelling by opening doors and windows
  • operate electrical switches
  • isolate the gas supply

• To what procedures must Domestic Tightness and Purging conform?

  Select IGE/UP/1 - Industrial and commercial with piperwork over 150mm and internal volume over 1m3 IGE/UP/1A - Industrial and commercial with pipework below 150mm and internal volume up to 1m3 IGE/UP/1B - Domestic with pipework up to 35mm and internal volume up to 0.035m3

  • IGE/UP/1 - Industrial and commercial with piperwork over 150mm and internal volume over 1m3
  • IGE/UP/1A - Industrial and commercial with pipework below 150mm and internal volume up to 1m3
  • IGE/UP/1B - Domestic with pipework up to 35mm and internal volume up to 0.035m3

• Which of the following gases is produced as a result of incomplete combustion?

  Carbon dioxide

  sodium monoxide

  Hydrogen peroxide

  Carbon monoxide

• Under IGE/UP/1B what operating / working pressure should you have at the meter?

  22MB + - 2MB

  20MB + - 2MB

  21MB + - 2MB

  21MB + - 1MB

• What do the following abbreviations stand for?

  ECV

  MOP

  MIP

  MCV

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• Answered verbally

  Yes

  No

  N/A

• A tightness test on a domestic installation is found to be within the permissible range, but a smell of gas can still be detected. Which of the following actions should the gas engineer carry out before commencing any further work on the installation?

  Select ventilate the room by opening all doors and windows, then carry out a tightness test trace and repair the escape shut off the gas supply and retest after 24 hours after thoroughly ventilating the area carry out another test using different equipment

  • ventilate the room by opening all doors and windows, then carry out a tightness test
  • trace and repair the escape
  • shut off the gas supply and retest after 24 hours
  • after thoroughly ventilating the area carry out another test using different equipment

• describe the full procedure for a tightness test ....

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• Verbally explained / Correct answer

  Yes

  No

  N/A

• You attend a breakdown and find the boiler IWP at 10mBar, there is also a gas hob in the property. What next steps do you take?

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• Verbally explained / Correct answer

  Yes

  No

  N/A

• You have low working pressure at the gas meter, what action do you take?

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• Verbally explained / Correct answer

  Yes

  No

  N/A

• You find a flue in a void with no access panels, explain your what action and process you would take.

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• Verbally explained / Correct answer

  Yes

  No

  N/A

• you attend a property, you find the boiler in a basement and it is running on LPG, how do you Categorise it?

  ID

  AR

  NCS

• please explain the reason for and procedure of a dead test for safe isolation.

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• Verbally explained / Correct answer

  Yes

  No

  N/A

• Please explain how to carry out a mains voltage and polarity check.

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• Verbally explained / Correct answer

  Yes

  No

  N/A