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WorksheetsGas Core Safety 6035-03 Level 3
Total questions: 28
Worksheet time: 14mins
Which image shows a Natural Draught Flue?
Which image shows a Open Flue?
Which of the following materials will be suitable for a condensing appliance chimney?
Copper
Mild Steel
Stainless Steel
Plastic
When a natural draught room-sealed flue terminal is located below a plastic gutter, a heat shield will be required if the terminal is closer than which of the following measurments?
300 mm
600 mm
1000 mm
1200 mm
Condensation in conventional natural draught open-flue Systems can be reduced by which of the following?
Reduce the length of the flue run internally
Increase the length of the flue run externally
Using a double wall metallic Chimney with an air gap only for the flue length greater than 2 metres
Using insulated double wall metallic chimney
Which is a full-bore valve?
In a litchen with a NG cooker with no openable window to outside the ventilation requirements will be met if?
There is extract ventilation of 10L/s located next to hob
There is extract ventilation of 20L/s located next to hob
There is extract ventilation of 30L/s located next to hob
There is extract ventilation of 40L/s located next to hob
What is standing pressure in a low pressure system?
19 mb
19 to 26 mb
19 to 29 mb
21 mb nominal
What is Working pressure in a low pressure system?
19 mb
10 mb
19 to 29 mb
21 mb nominal
What is shown?
U6
E6
G4
G10
A room-sealed flue is stated to be what Category letter?
A
B
C
D
Volume of 1% CO in Air would cause what affects on the human body?
Slight headache
Severe headache, dizziness and nauusea
Severe symptoms leading to death within 15 minutes
Death within 3 minutes
BS 7967 Part 1:2005 describes what?
Open Flue Boilers
Smoke Alarms
Domestic CO detectors
Maximum temperatures of domestic ovens
A Vertex Flue System takes its air for combustion from?
Outside Air
From within the room
From the loft
Does not require air for the combustion process
Annular space should be the following gap
5 mm
20 mm
25 mm
50 mm
A aerial can affect the performance of a flue?
false
True
The void volume in litres of an unlined brick chimney is a minimum volume of?
12 litres
6 litres
4 litres
2 litres
When installing a flue block system how many starter blocks must there be?
1
2
3
4
Ridge terminals with openings on all sides should be located a minimum of how many mm from each other?
1000 mm
500 mm
300 mm
250 mm
A U-duct system is suitable for use with appliance flue types?
C2 and C4
A
B12
C17
An NG Open Flue must not incorporate a 90 degree bend unless it is a powered flue?
True
False
A closure plate is found?
As part of an open flued boiler
As part of a room-sealed boiler
As part of a Flueless free standing cooker
As part of a radiant convector gas fire
Where would you find a flue spigot?
Gas valve
Radiant convector gas fire
Vertex Flue system
Terminal fixture
Any installation which has previously used a solid fuel appliance must for the first time of being used for a NG appliance be?
Inspected by the consumer of gas
Must have a local authority inspection
Chimney swept and tested
The mouth of the opening must be painted white
What is shown?
Flue Guards
Catchment Space Guards
Gas Fire Guards
Frying Baskets
If you are installing a 24 Kw (Net) Open Flued boiler in a room 4.7 (L) x 3.2 (W) x 2.1 (H) what would be the required ventilation vent size?
120 cm2
100 cm2
85 cm2
No purpose ventilation required
If you are installing a 24 Kw (Net) Room sealed boiler in a room 4.7 (L) x 3.2 (W) x 2.1 (H) what would be the required ventilation vent size?
120 cm2
100 cm2
85 cm2
No purpose ventilation required
Adventious ventilation is equivilant to?
100 cm2
35 cm2
50 cm2
125 cm2
