Overview

Question 1

Axedo 450-2 and Axedo 600 chambers are an example of what type of chamber in accordance with Sewers for Adoption 7?

Answer 1

Type 3 (Flexible Material)

Question 2

If a scheme is to be adopted under a Section 38 approval, who is likely to adopt and maintain the drainage?

Answer 2

Local Council/Highways Authority

Question 3

Which section of Sewers for Adoption 7 governs the use of Thermoplastic Structured Wall Pipe systems (such as ULTRA3)?

Answer 3

E 2.22

Question 4

If a drainage scheme is to be adopted under an S104 agreement all parts of the system serving 2 or more residential properties will be adopted by the local water authority if built to acceptable standards. True or False?

Answer 4

True

Question 5

If a drainage scheme is to be adopted under an S106 agreement which of the following best describes the process:

1. The local water authority will adopt the entire drainage network on commercial sites only.
2. Only the drainage serving the road areas will be adopted. This will be adopted by the local council/highways authority.
3. All of the drainage will be adopted as long as it meets the requirements of SfA7.
4. There is an agreement to discharge into an existing adopted public sewer. The bulk of the system will remain private but the final connection will need to be to Sewers for Adoption standard.

Answer 5

4. There is an agreement to discharge into an existing adopted public sewer. The bulk of the system will remain private but the final connection will need to be to Sewers for Adoption standard.

Question 6

Section 104 and Section 106 are part of what legislation?

Answer 6

Water Industry Act 1991

Question 7

According to Building Regulations Part H 2015 what is the minimum recommended fall for a foul water pipe with a minimum of 1 WC connected?

Answer 7

1:80

Question 8

According to Building Regulations Part H 2015 what is the maximum distance that two Axedo 600 chambers can be from one another on a drainage run?

Answer 8

45 Metres

Question 9

Which section of Sewers for Scotland 3 governs the use of Thermoplastic Structured Wall Pipe systems (such as ULTRA3)?

Answer 9

4.2.22

Question 10

What are the 2 main differences between the installation details shown in SfA7 and SfS3 for PCC manholes constructed using standard width chamber sections?

Answer 10

1. SfS3 does not require the entire chamber to be encased in cast in situ concrete.
2. SfA7 requires a minimum of 2 courses of engineering bricks whereas SfS3 will allow for 1 course.

Question 11

According to Building Regulations Part H 2015 what is the minimum distance from a building that a drainage field can be installed?

Answer 11

15 Metres

Question 12

According to Building Regulations Part H 2015 what is the minimum distance from a building that a surface water soakaway can be installed?

Answer 12

5 Metres

Question 13

When designing surface water soakaways we would typically follow the guidance of what document?

Answer 13

BRE Digest 365

Question 14

What guidance document would we use to size a sewage treatment system correctly?

Answer 14

Flows and Loads 4

Question 15

According to section E2.22 of SfA7, alongside BS EN 13476 what other approval should Thermoplastic Structured Wall Pipe have to be suitable for adoptable applications?

Answer 15

WIS 4-35-01

Question 16

According to Table 13 of Building Regulations Part H1 2015, what is the maximum allowable spacing between two Axedo 450-2 chambers?

Answer 16

45 Metres

Question 17

According to Table 13 of Building Regulations Part H1 2015, what is the maximum allowable spacing between an Axedo 600 chamber and a man entry PPC manhole?

Answer 17

90 Metres

Question 18

According to Flows and Loads 4, what flow of waste water is produced per person, per day in a standard residential domestic dwelling?

Answer 18

150 Litres

Question 19

According to BRE Digest 365 any soakaway should drain from full to half full within what time period?

Answer 19

24 Hours

Question 20

A surface water soakaway could be constructed if which of the following statements is true?

1. The half drain time is greater than 24 hours
2. Groundwater reaches the base level of the soakaway during annual variations in the water table.
3. The system will be within 5m of an existing building.
4. The system will be sited in sandy soil.

Answer 20

4. The system will be sited in sandy soil.

Question 21

If a drainage system is being constructed in accordance with MCHW Series 500 and they have requested a Type 7 chamber what will the chamber diameter be?

Answer 21

1050mm

Question 22

What does BBA stand for?

Answer 22

British Board of Agrement

Question 23

Which figure in Sewers for Adoption 7 shows the allowable construction type for Axedo 450-2 or Axedo 600 chambers?

Answer 23

B.16

Question 24

According to Flows and Loads 4, if a sewage treament plant is to serve a single house with 3 bedrooms what is the minimum poulation capacity (P) that the system should be designed for?

Answer 24

5 P

Question 25

According to Table 13 of Building Regulations Part H1 2015, what is the maximum allowable spacing between a rest bend and a 450Ø PPIC chamber?

Answer 25

22 Metres

Question 26

According to Sewers for Adoption 7, what are the minimum allowable dimensions (length x width) for a valve chamber on an adoptable pumping station?

Answer 26

2400mm x 1800mm

Question 27

According to Sewers for Adoption 7, on adoptable pumping stations the cover and frame should be manufactured from what material?

Answer 27

Galvanised Steel

Question 28

True or False - According to Sewers for Adoption 7, wet well chambers should have no permanent ladder or step irons within the chamber itself?

Answer 28

True

Question 29

According to Diagram 1 in Building Regulations Part H2 2015, what size of granular material should be used below the perforated pipe in foul water drainage fields?

Answer 29

30-50mm

Question 30

According to Building Regulations Part H2 2015, drainage fields should only be used when the on site percolation tests show and average Vp value between what numbers?

Answer 30

12 and 100

Question 31

According to Building Regulations Part H2 2015, what is the minimum required storage capacity of a septic tank serving 6 people?

Answer 31

3060 Litres

Question 32

According to Sewers for Adoption 7, Thermoplastic Structured Wall pipes less than or equal to 500mm in diameter should have a nominal short term ring stiffness of what?

Answer 32

8 kN/m²

Question 33

According to Sewers for Adoption 7 you could advise an Axedo chamber as a means of access if which of the following statements are true? 1. The depth from the surface to the crown of the pipe is greater than 3m. 2. The largest pipe diameter is greater than 150mm. 3. There are two or more upstream pipes each serving more than ten properties. 4. The distance between manholes (man access) would be greater than 150m.

Answer 33

2. The largest pipe diameter is greater than 150mm.