WorksheetsACS CCN1 Quiz 2
Total questions: 11
Worksheet time: 6mins
How is the PV calculated for a U16 or G10 gas meter?
1.5 x PV
5x the badge capacity
1.5 x IV
0,01m3
What is the correct gas rate if you start and finish meter readings are 0.592 and 0.681?
27.58kw gross
26kw gross
28.72kw gross
29.46kw gross
When converting gross to net heat input you must
Multiply by 1.11
Divide by 1.11
Divide by 1.09
Multiply by 1.09
1. What is the equivalent new KW figure if adventitious air?
14kw
28kww
1.11kw
7kw
What is the smallest size of opening allowed in a vent supplying combustion air?
5mm
6mm
9mm
10mm
Vents supplying combustion air to a gas fired appliance passing through a cavity wall must be?
At least 100mm2 cross sectional area
Sleeved/ducted throughout the width of the wall
Painted yellow ochre to identify is a gas vent
At least 50% larger than the actual requirement
Calculate the ventilation for an open flued gas boiler of 22.2kw gross with a room venting direct to the outside? (hint: convert to net)
65cm2
76 cm2
100 cm2
111 cm2
Wherever there are two or more internal vents in series, the free area of each internal vent shall be increased by?
100 cm2
50 cm2
50%
10%
Calculate the compartment ventilation for 22kw net heat input open flued boiler where the component is vented into a room?
High 220 cm2 Low 440 cm2
High 220 cm2 Low 220 cm2
High 110 cm2 Low 220 cm2
High 150 cm2 Low 300 cm2
Where would air for combustion be taken from on a vertex flue?
The loft space
The fan
The compartment vents
The terminal
An appliance with a B12 Chimney system is described as?
Open flue, fan draft, with fan upstream of heat exchanger
Open flue, fan draft, without down draft diverter (closed flue)
Room sealed, fan draught, with fan downstream of heat exchanger
Open flue, fan draught, with draught diverter, with fan down stream of heat exchanger
