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WorksheetsPlumbing Quiz
Total questions: 75
Worksheet time: 40mins
What is the minimum depth required for a communication pipe?
750mm
1350mm
25mm
15mm
What is the minimum diameter for a service pipe?
750mm
1350mm
25mm
15mm
Which of the following is NOT a requirement for the rising main?
15mm (min)
Stop valve
DOV
Ferrule/isolation
What is the minimum diameter for a communication pipe?
750mm
1350mm
25mm
15mm
What type of pipe is required to be ducted?
Incoming mains
Communication pipe
Service pipe
Rising main
What is a requirement for an internal water meter for safety?
It needs to be cross bonded.
It needs to be painted.
It needs to be insulated.
It needs to be placed outside.
What is shown in the image labeled "A boundary meter box"?
A water meter
A boundary meter box
A stop valve
A drain-off valve
What color is MDPE pipe used to identify wholesome water?
Red
Blue
Green
Yellow
What is the minimum size for modern property pipes?
15mm
20mm
25mm
30mm
What type of copper can be used according to the requirements?
Hard copper
Soft copper (R220)
Soft copper (R300)
Hard copper (R220)
Where is the meter commonly installed at the property boundary?
In the basement
In a chamber
In the attic
In the garage
Where can water be isolated according to the requirements?
Only in the road
Only at the meter
Only at the point of entry to the property
In the road, at the meter, or at the point of entry to the property
Under which regulations is everything from the external stop valve at the meter regulated?
Water Regulations 1995
Water Regulations 1997
Water Regulations 1999
Water Regulations 2001
According to the Water Regulations, where should a stop valve be located?
Outside the building
Inside the building, above floor level, near the point of entry
Inside the building, below floor level, far from the point of entry
Outside the building, below floor level
What is the maximum recommended height for MDPE above floor level according to water undertakers?
100mm
150mm
200mm
250mm
Which type of stop valve can be used according to the Water Regulations?
Screwdown (BS1010)
Ball valve (BS1234)
Butterfly valve (BS5678)
Gate valve (BS9101)
What is another type of stop valve that can be used according to the Water Regulations?
Level arm (BS6675)
Ball valve (BS1234)
Butterfly valve (BS5678)
Gate valve (BS9101)
How does the stop valve create a watertight seal?
By turning the handle to push a washer against a seating
By using a spanner to tighten the valve
By replacing the head gear
By installing above the incoming stop valve
What is a cost-effective method of repair if the stop valve jams?
What tool is used to operate the DOV?
A handle
A spanner or key
A screwdriver
A hammer
Where must a DOV be installed in the system?
At the highest point in the system
Above the incoming stop valve and at every low point
Only at the incoming stop valve
At the middle point of the system
Which of the following must a plumbing system comply with?
Building Regulations
Electrical Regulations
Water Regulations
Fire Safety Regulations
What must every plumber prevent?
Water wastage
Contamination of wholesome water
Pipe corrosion
High water pressure
What must be given in advance for installations?
Payment
Notice
Approval
Inspection
What is one benefit of becoming an Approved Plumbing Contractor?
Higher salary
More vacation days
Passing the Water Regulations training course
Free tools
Who has produced the guide to the Water Regulations?
EPA
WRAS
OSHA
WHO
What are the two key tests with cold water systems?
Temperature and Pressure
Pressure and Flow rate
Flow rate and Temperature
Temperature and Volume
Where is pressure normally first tested in a cold water system?
Near the point of entry
At each outlet
At the highest point
At the lowest point
Where is flow rate tested in a cold water system?
Near the point of entry
At each outlet
At the highest point
At the lowest point
What does pressure refer to in the context of water flow?
The temperature of the water
The force behind water flow
The color of the water
The chemical composition of the water
When is a more accurate reading of water pressure needed in domestic situations?
When checking the water temperature
When installing certain appliances
When measuring water color
When testing water purity
Which of the following is NOT mentioned as a situation requiring accurate water pressure readings?
Installing water softeners
Installing combination boilers
Installing un-vented cylinders
Installing water filters
What are the two basic means of creating pressure in plumbing systems?
Using a pump or the weight of water
Using a heater or the weight of water
Using a filter or a pump
Using a heater or a filter
What is the flow rate a measure of?
The pressure of water discharging to an appliance
The volume of water discharging to an appliance
The temperature of water discharging to an appliance
The speed of water discharging to an appliance
How is the flow rate measured?
In litres per hour
In litres per second
In litres per minute
In litres per day
What would happen if the flow rate was poor?
The bath would fill up faster
The bath would take longer to fill up
The water would be colder
The water pressure would increase
In a domestic situation, what is usually sufficient to check the flow rate?
A visual check
A pressure gauge
A thermometer
A stopwatch
What tool can be used to check the flow rate more accurately?
A thermometer
A flow cup or weir cup
A pressure gauge
A stopwatch
What is the equivalent of 60 litres per minute in litres per second?
0.1 l/sec
1 l/sec
10 l/sec
0.01 l/sec
What is the equivalent of 6 litres per minute in litres per second?
0.1 l/sec
1 l/sec
10 l/sec
0.01 l/sec
Which of the following factors can affect pressure and flow?
Daily demand (peak periods)
Color of the pipes
Type of flooring
Weather conditions
What is one of the factors that can affect pressure and flow in a property?
Age of property
Number of windows
Type of paint used
Height of the building
Which of the following is NOT a factor that affects pressure and flow?
Distribution main size
Incoming main size
Installation pipe size
Color of the walls
How can the number of elbows in a pipe system affect pressure and flow?
It can increase the pressure
It can decrease the pressure
It has no effect
It can change the color of the water
Which of the following materials used can affect pressure and flow?
Materials used
Type of furniture
Number of doors
Type of lighting
What is a direct system in the context of cold water supply?
A system where cold water is supplied to each outlet on mains pressure.
A system where cold water is stored in a tank before being supplied.
A system where hot water is supplied directly to each outlet.
A system where water is supplied at low pressure.
What is the usual size of the service pipe to the house in a direct system?
15mm MDPE
20mm MDPE
25mm MDPE
30mm MDPE
What material is the service pipe usually connected to inside the house in a direct system?
10mm copper
15mm copper
20mm copper
25mm copper
What precaution is important to take on a direct system?
Preventing leaks
Ensuring high pressure
Taking precautions against backflow
Using larger pipes
What size of MDPE copper or lead mains might old houses have?
15mm
20mm
25mm
30mm
What type of water system supplies all the cold water in a property directly on top of each outlet on mains pressure?
Indirect system
Direct system
Gravity-fed system
Pumped system
In a direct water system, what type of pressure is used to supply cold water to the outlets?
Low pressure
Medium pressure
High pressure
Variable pressure
What is the only stored water used for in a direct system?
Cold water supply
Hot water system via the cylinder
Drinking water
Garden irrigation
How many DOVs are required to drain the system down in a direct system?
Two
Three
One
None
What is the diameter of the pipework in a direct system due to high pressure?
10mm
20mm
15mm
25mm
What is a characteristic of a direct system using a combination boiler?
It stores hot water in a tank.
It uses a separate heater for hot water.
Both hot and cold water are directly off mains.
It requires a water jacket heater.
In a direct system with a combination boiler, what is the status of stored water?
There is a large amount of stored water.
There is no stored water at all.
Water is stored in a separate tank.
Water is stored in a water jacket heater.
Which type of hot water system is similar to a direct system with a combination boiler?
A vented hot water system
A water jacket heater hot water system
A solar water heating system
A tankless water heater system
What is one advantage of a direct system?
Potable water at every draw off point
Pressure varies during the day
Care when fitting showers/mixer taps
If the mains is turned off you are without water
Which of the following is a disadvantage of a direct system?
Good pressure at all draw off points
No concerns about storage cisterns in lofts
If the mains is turned off you are without water
Potable water at every draw off point
At what times can the pressure be very low in a direct system?
8.30am-10.30am and 6-8pm
6.30-8.30am and 5-7pm
7-9am and 4-6pm
5-7am and 6-8pm
Which of the following is NOT an advantage of a direct system?
Potable water at every draw off point
Good pressure at all draw off points
No concerns about storage cisterns in lofts
Pressure varies during the day
What is an indirect cold water system?
A system where cold water is taken directly from the mains to all outlets.
A system where cold water is taken via the rising main to a high-level storage cistern.
A system where hot water is taken via the rising main to a high-level storage cistern.
A system where cold water is taken directly from the storage cistern to all outlets.
Which outlet is an exception to the low pressure in an indirect cold water system?
Bathroom sink
Shower
Kitchen sink
Toilet
What is the required size for the distribution pipe from the storage cistern in an indirect cold water system?
15mm or 20mm
22mm or 28mm
30mm or 35mm
40mm or 45mm
What type of system is described as a low pressure system feeding most outlets in the property?
Direct system
Indirect system
High pressure system
Closed system
What is the minimum capacity for the water cistern in the indirect system?
100 litres
150 litres
230 litres
300 litres
Which component in the indirect system is responsible for storing cold water?
Service valve
Vented hot water storage vessel
Cold water storage cistern
Stop valve
What is the function of the warning pipe in the indirect system?
To distribute cold water
To store hot water
To indicate overflow
To stop water flow
Which of the following is an advantage of an indirect system?
More pipework in roof space
Possible contamination of water at draw-off points
Stored supply of hot water, should mains be turned off
Only one draw-off point gives potable water
What is a disadvantage of an indirect system?
The system pressure is unaffected by peak time demand
Stored supply of hot water
More expensive
Constant pressure
Which of the following is NOT a disadvantage of an indirect system?
More pipework in roof space
Possible contamination of water at draw-off points
The system pressure is unaffected by peak time demand
Only one draw-off point gives potable water
According to BS6700 and the Water Regulations, what is the required capacity for a cold water storage cistern if supplying both hot and cold water?
100-150 liters
150-200 liters
230-250 liters
200-230 liters
How can the cold water storage system be identified?
By checking the water temperature
By inspecting the loft to see the CWSC or by testing the outlets
By measuring the water pressure
By checking the water color
What is the required capacity for a cold water storage cistern if supplying either hot or cold water?
50-100 liters
100-150 liters
150-200 liters
200-250 liters
