Tightness Test

Question 1

Which of the following is the most appropriate standard to refer to when tightness testing natural gas pipework above 35mm diameter at domestic premises ?

A . BS6891
B . IGE/UP/1A (edition 2 )
C. IGE/UP/1B (edition 3 )
D. LPGA TM83

Answer 1

B. IGE/UP/1A (edition 2 )

Question 2

From the following,when will it be necessary to undertake tightness?

A) After painting or wrapping the gas pipe
B) immediately after purging the gas pipe
C) after restoring the gas supply following work on installation
C) prior to working on existing installation

Answer 2

C) prior to working on existing installation

Question 3

Which of the following is defined as a suitable gauge for tightness test purpose ?

A) Mercury gauge with an accuracy of 0.1 M bar
B) High specific gravity gauge with an accuracy of 0.5 Mbar
C) Electronic gauge with an accuracy of 0.1 Mbar
D) water gauge with an accuracy of 1 Mbar

Answer 3

C) Electronic gauge with an accuracy of 0.1 Mbar

Question 4

Perceptible gauge movement is defined as which of the following ?

A) 0.1mbar
B) up to 0.25 Mbar
C) up to 0.5 Mbar
C) up to 1 Mbar

Answer 4

B) up to 0.25 Mbar

Question 5

What is the associated difficulty when undertaking tightness testing if a token meter is fitted ?

A) it could run out of credit the test
B ) the anti-tamper mechanism could automatically turn gas on during the test
C)The anti tamper mechanism could automatically turn gas off during the test
D) The meter must be removed

Answer 5

C)The anti tamper mechanism could automatically turn gas off during the test

Question 6

What is the permissible pressure loss for a domestic gas installation ( existing installation with appliances fitted and no smell of gas ect) where the gas meter is remote and not included in the tightness test e.g An individual flat with AECV and supplied via a communal meter? 
A) 2mbar
B) 4mbar
C) 6mbar
D) 8mbar

Answer 6

D) 8mbar

Question 7

Which of the following is a correct pressure drop allowance when carrying out a tightness test on an existing installation with appliances connected?

A) 1mbar for 35mm diameter pipework with no meter fitted
B) 8bar for 35mm diameter pipework with E6 meter fitted
C) 2.5 for 35mm diameter pipework with G4 meter fitted
D) 2.5 Mbar for 35mm diameter pipework with G10 meter fitted

Answer 7

C) 2.5 for 35mm diameter pipework with G4 meter fitted

Question 8

What action should be taken if an ECV at the primary meter fails a let-by test ?

Answer 8

Make immediate contact with gas emergency service to repair before proceeding with the test

Question 9

If the responsible person maintains they can smell gas after you have completed a satisfactory tightness test, what course of action should be taken ?

A) Advise the responsible person they are mistaken
B) Carry out another tightness test witnessed by the responsible person so it can be demonstrated there is no escape
C) allow continued use of gas because the escape must be outside on the main
D) Turn off gas and make immediate contact with the gas emergency service

Answer 9

D) Turn off gas and make immediate contact with the gas emergency service