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WorksheetsRainwater systems
Total questions: 41
Worksheet time: 21mins
What are the following gutter profiles depicted called?
Ogee
Square Line
Box Line
Half Round
List the five areas where rainwater can be discharged to.
Surface Water Drain and Combined Sewer
In to the bath waste system
A water Course and Soak away
A Rainwater Harvesting System
Internally to the home via the vent stack
Which source of information states the statutory requirements for a rainwater system?
Building regulations Part H3
Building regulations part F3
Water regulations (water fittings) 1999
BS EN 12056Part 3
Which source of information offers guidance about the installation of a rainwater system?
BS EN 12056 Part 2
CPD 7 2016
BS EN 12056 Part 3
BS EN12056:3-2000
What is rainfall intensity measured in?
Litres/second/meter²
Litres/minute/meter³
Gallons/hours/foot²
Pints/minute/foot³
why is the roof area is an important consideration when designing a rainwater system.
The steeper the the roof pitch the better
The less the roof are the more rainwater collected
Flat roofs are better than a pitched roof
The greater the roof area the more rainwater collected
What is the ratio of fall that BS EN 12056 Part 3 states should be in place for a gutter system to work correctly?
1:800
1:700
1:600
1:500
Which one of the following is a style of plastic guttering?
Elsan
Mansard
Ogee
Half channel
Which one of the factors listed needs to be considered before the installation of a rainfall system?
The height and shape of the building
The type of roof covering that the property has
The roof area and direction of fall
What type of drainage system the building is connected to
How can you check a gutter and downpipe for soundness and performance?
Wait until it rains, then climb up to look
Pour water into the gutter and inspect the system for ponding and leaks
Explanation: This method allows you to actively test the gutter and downpipe system for any issues by simulating rain conditions, making it easier to spot leaks or areas where water may not be draining properly.
Ask the customer to let you know if they see any leaks
Join the system together before installation and inspect for leaks
What is another term for the offset from a gutter to downpipe?
Cranked turn
Direco-change
Goose neck
Swan neck
What is a common downpipe diameter?
68mm
50mm
72mm
32mm
In a rainwater system, what is the normal ratio of fall for the gutter?
Answer Explanation: The normal ratio of fall for a gutter in a rainwater system is typically 1:600. This ensures that water flows efficiently without overflowing or causing damage to the gutter system.
1:400
1:60
1:2,000
1:600
On domestic properties, what is the maximum distance at which the facia brackets should be apart?
1.25m
1,500mm
1,000mm
1.8m
Which one of the following is an advantage of plastic guttering systems?
Flexible and low maintenance
It only requires painting every two years
Running outlet connections can be made on every elevation
Expansion is taken up in caulked joints
Which of the following is a downpipe fitting?
Slipper
Boot
Shoe
Belt
When fitting plastic guttering, where is the allowance for expansion and contraction made?
At the running outlet connections
Every 10m where there is an expansion and contraction connection
At the corner connections only
In each of the fittings
Which of the following would NOT determine the Maintenance Requirements of the rainwater systems?
The age of the system
The location of the property
The height of the gutter
Type of guttering material
If there is no facia board on the property, what bracket could be used to secure the gutter in place?
Stand-off bracket
Rafter bracket
Purlin bracket
Eave bracket
Which one of the following is not a health and safety consideration when installing cast iron guttering?
Access to install
Weight of sections
Weather conditions
Type of connection bolts
Why should a rainwater system be checked regularly and cleaned, if required?
Expansion joints need to be relocated
Plastic regularly cracks
The system can get blocked with leaves
To make sure that the flow rate from the roof is correct
If you use an online guttering calculator, apart from the roof size and number of outlets, what other information will be required?
The roof angle
The style of roof tiles
The number of roof protrusions
The height of the building
What are the two important factors to consider with the roof area in rainwater systems?
Slope and material of the roof
Color and design of the roof
Height and width of the roof
Age and condition of the roof
Which of the following is an important factor to consider with the roof area?
The color of the roof
The actual size of the roof area
The material of the roof
The number of windows
How does the roof area affect the amount of rainwater collected and the velocity at which the water enters the guttering?
Larger roof area collects more rainwater and increases water velocity.
Smaller roof area collects more rainwater and decreases water velocity.
Larger roof area collects less rainwater and decreases water velocity.
Roof area does not affect rainwater collection or water velocity.
What is the function of a running outlet in a rainwater system?
To collect rainwater from the roof
To direct rainwater to the drainage system
To store rainwater for later use
To filter debris from rainwater
The position of the running outlet is usually based on the location of which part of the property?
Drain gulley
Kitchen
swimming pool
Garage
True or False: The more outlets on the system, the less distance the rainwater has to travel in the gutter and the greater discharge efficiency the system has.
True
False
What is the purpose of a rainwater outlet in a rainwater system?
To collect rainwater from the roof
To filter debris from rainwater
To direct rainwater to the drainage system
To store rainwater for later use
In the diagram of the rainwater system, where does the rainwater outlet lead to?
Surface water sewer in the road
Inspection chamber
Roof
Garden
What should you check to find out the flow capacity of a running outlet design?
The material of the outlet
The diameter of the outlet
The color of the outlet
The brand of the outlet
How can you determine the number of outlets a roof line may require?
By calculating the roof area and slope
By considering the number of rooms in the house
By checking local building codes
By estimating the number of electrical appliances
According to BS EN 12056, what should be the fall of gutters per Metre length? (Per 1000mm)
1-3mm
3-5mm
5-7mm
Fill in the blank: The gradient of the eaves gutter should not allow the rainwater to run off the roof and ______ the gutter.
miss
overflow
clog
damage
Fill in the blank: The fall of the gutter is interpreted as a 1mm drop every _______ length.
600mm
500mm
700mm
800mm
What is the effect of changes in direction in a gutter system?
Increases efficiency
Decreases efficiency
No effect
Fill in the blank: Straight runs give ______ flow rate.
maximum
minimum
average
variable
What does S&VP stand for in the diagram?
Soil and vent pipe
Sewer and vent pipe
Soil and valve pipe
Sewer and valve pipe
Why might a combined system be considered simpler?
It uses fewer pipes
It requires less maintenance
It combines foul and rainwater into one system
Explanation: A combined system is considered simpler because it integrates both foul and rainwater into a single system, reducing the complexity of having separate systems for each.
It is cheaper to install
What is a potential issue with PVCu guttering in cold weather?
It expands
It becomes flexible
It contracts and goes brittle
Explanation: In cold weather, PVCu guttering can contract and become brittle, making it more susceptible to cracking or breaking.
It changes color
Which of the following is NOT an advantage of PVCu?
Easy to install
Heavy weight
Minimal maintenance
Economical
