NEW
Font size
Worksheetsunvented hot water
Total questions: 20
Worksheet time: 10mins
Building regulation approved document G3 states that the temperature of the water in a storage hot water system must not exceed:
65 0C
85 0C
98 0C
100 0C
Building regulation approved document G3 requires notice to be given to the local authority building control by means of a building control notice unless:
the installation is 250 litres or above and the individual / business is registered with a competent persons scheme for self certifying UVHW systems
The individual / business is registered with a competent persons scheme for self certifying UVHW systems
The system is a 'package' type
The system is a 'unit' type
The boiling point of water at sea level is:
80 0C
90 0C
100 0C
110 0C
with reference to the chart, what is the approximate temperature at which water will boil at 2000m above seal level
90 0C
80 0C
84 0C
94 0C
With reference to D2 discharge pipework, what is the minimum vertical drop from the tundish to the first change of direction
50 mm
150 mm
300 mm
350 mm
What component device needs to be installed on the cold supply to an unvented cylinder to prevent grit and debris damaging other components
Which type of primary circulation system can not be used to heat an unvented cylinder
Fully pumped
Gravity
S plan
Y plan
What regulation covers insulation and performance of Hot water cylinders
Approved document L1
Approved document G3
water regulations 1999
Approved documents P
What is fitted to the bottom of a cylinder to help prevent corrosion ?
Sacrificial anode
Sacrificial cathode
Brass Block
Air vent
At what height should a thermostat be fitted on a cylinder?
1/3 from the top
1/3 from the bottom
1/2 way up
In the middle
Building Regulations part G now states that hot water delivered to a bath should not exceed?
43
48
38
60
This picture shows a?
Temperature pressure relief valve
Pressure relief valve
Blending valve
Immersion stat
This picture shows a?
Temperature pressure relief valve
Pressure relief valve
Blending valve
Immersion stat
It is important that the height of the open vent pipe over the CWSC is measured correctly this is done by?
150mm + 40mm per metre of system height (m)
100mm + 50mm per metre of system height (m)
150mm + 50mm per metre of system height (m)
100mm + 40mm per metre of system height (m)
What is the maximum length of dead leg for a 15mm or 22mm pipe before a secondary return system has to be installed?
5m
8m
10m
12m
The two port motorized valve fitted to the primary flow on a UVHW cylinder must be wired in series with the energy cut off thermostat:
True
false
A UVHW cylinder supplied as a package has all safety devices factory fitted with all other components supplied loose.
True
False
A UVHW cylinder supplied as a unit has all safety and other functional devices factory fitted.
True
false
A sacrificial anode does what?
prevent hard water
soften water
fail safe in the event of overheat
corrode instead of the vessel corroding
