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Surface Water Drainage > Surface Water Drainage Introduction > Flashcards

Surface Water Drainage Introduction Flashcards

1
Q

The HydroChamber is what shape

A

Arched chamber

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2
Q

The catchpit manholes of the HydroChamber reduces what getting in?

A

Grit & silt

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3
Q

The HydroChamber is made from which material?

A

HDPE

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4
Q

Large diameter HDPE pipe stocked by JDP is supplied by which manufacturer?

A

Asset

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5
Q

The storage capacity of a crate is what percentage of its total volume?

A

95%

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6
Q

Which type of separator would most likely to be used under a car park?

A

Bypass

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7
Q

If a client asks for 300m³ of Storage what would be the required volume of the crates?

A

315m³

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8
Q

If a client asks for 100m³ of Storage what would be the required volume of the crates?

A

105m³

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9
Q

Which of these would not be acceptable for an adoptable storm water management system: Metal tank, GRP tank or Concrete tank?

A

Metal Tank

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10
Q

What do we mean by permeable land?

A

Land where rainwater can soak into the ground

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11
Q

Will stormwater reach a watercourse more quickly on permeable ground or on impermeable ground?

A

Impermeable ground

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12
Q

The process of storing stormwater in one location before releasing it into the ground in a controlled way is known as what?

A

Attenuation

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13
Q

What is meant by an adopted system?

A

A system which is maintained or will be maintained by the water authority.

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14
Q

An attenuation system is only required when developing a greenfield site. True or False?

A

FALSE

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15
Q

What percentage do you add to the surface area of an attenuation crate membrane for laps?

A

10%

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16
Q

Perforated coil is used is used as carrier pipe.True or False?

A

FALSE

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17
Q

Which type of land drainage layout would be used on a railway embankment?

A

Herringbone

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18
Q

Most farm land has never been drained. true or False

A

FALSE

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19
Q

Land drain coil is made from which material?

A

uPVC, HDPE, Polyethylene

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20
Q

Which of the following manufactures land drain coils: Acorn, Kingspan, Polypipe

A

Polypipe

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21
Q

In what lengths are 80mm land coil available?

A

25m, 50m and 100m

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22
Q

In what lengths are 60mm land coil available?

A

25m, 50m and 150m

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23
Q

In what lengths are 100mm land coil available?

A

25m, 50m and 100m

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24
Q

In what length is 200mm land coil available?

A

40m

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25
Q

In what length is 125mm land coil available?

A

75m

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26
Q

In what lengths are 160mm land coil available?

A

25m, 45m and 50m

27
Q

Land coil can be recommended for septic tank drainage. True or False

A

FALSE

28
Q

What type of bore does land drain have?

A

Ribbed

29
Q

For what is the letters PPG4 an abbreviation ?

A

Planning Policy Guidelines 4

30
Q

What is the minmum depth of cover at which that land drain should be installed?

A

450mm

31
Q

What is the minimum depth of cover recommmended for 600 mm land drain?

A

450mm

32
Q

Which of these customers would be most likely to use Kite Marked land drain - farmer or council?

A

Council

33
Q

What is the minimum cover to a Graff crate in a non trafficked area?

A

300mm

34
Q

What is the minimum cover to a Wavin or Polypipe crate in a non trafficked area?

A

500mm

35
Q

What is the difference in the uses for a Highway Range and an Estate Range cover and frame from Peter Savage?

A

Highway Range is used in areas of constant traffic and Estate Range for occasional traffic

36
Q

What size is a Wavin or Polypipe Crate?

A

1.0m x 0.5m x 0.4m

37
Q

What size is a Graff Rainbox Crate?

A

1.2m x 0.6m x 0.42m

38
Q

Twinwall can be used for a sewerage application . True or False?

A

FALSE

39
Q

From what material is twinwall manufactured ?

A

HDPE

40
Q

Twinwall is usually supplied in what lengths ?

A

6m

41
Q

What is the OD of 150mm JFC twinwall ?

A

178mm

42
Q

What is the OD of 225mm JFC twinwall ?

A

265mm

43
Q

What is the OD of 300mm JFC twinwall ?

A

354mm

44
Q

For what is TEPPFA an abbreviation?

A

The European Plastic Pipes & Fittings Association

45
Q

What is the OD of 375mm JFC twinwall ?

A

426mm

46
Q

What is the OD of 450mm JFC twinwall ?

A

512mm

47
Q

What is the OD of 600mm JFC twinwall ?

A

680mm

48
Q

What is the maximum depth that twinwall may be installed?

A

10m

49
Q

Which manufactures supply Twinwall made from recycled materials?

A

JFC and Polypipe

50
Q

What is the shallowest depth at which you can install twinwall ?

A

0.5m

51
Q

For what do the letters HDPE stand?

A

High Density Polyethylene

52
Q

How much does twinwall weigh in comparison to concrete ?

A

6%

53
Q

JFC twinwall is made from what percentage of recycled materials ?

A

100%

54
Q

Why is the inner wall of Twinwall smooth ?

A

To enable increased flow capacity.

55
Q

When using twinwall on highway scheme, is it likely to require BBA approval ?

A

Yes

56
Q

When using twinwall on farming project would it need to be BBA approved ?

A

No

57
Q

How would you traditionally join twinwall pipe ?

A

Push fit coupling

58
Q

Ridgidrain is the name for who’s twinwall pipe ?

A

Polypipe

59
Q

What colour is Ridgidrain internally ?

A

Blue

60
Q

The Ridgidrain system was the first drainage product in the market to achieve what approval ?

A

HAPAS

61
Q

For what is HAPAS an abbreviation?

A

Highway Authority Product Approval Scheme

62
Q

Corripipe is the name for who’s twinwall pipe ?

A

JFC

63
Q

Which Naylor Twinwall does not have BBA approval

A

N Drain

64
Q

How many seals would you need for a single socket twinwall pipe ?

A

1

Surface Water Drainage (1 decks)

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