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Gas > Random Shit > Flashcards

Random Shit Flashcards

1
Q

Vertex flue

A

300mm from insulation

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2
Q

Riddor report time

A

14 Days

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3
Q

Carport is open on… side

A

2

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4
Q

Smoke pellet requirements

A

5m3 / 30 seconds

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5
Q

Electric spacings

A

150mm main services
25mm cables/ switches

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6
Q

Working pressure @ meter

A

21 mbar +2 -2.5

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7
Q

Terminal guard, gap

A

50mm from any point of terminal

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8
Q

Timed purge

A

<0.02m3

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9
Q

Source of ignition purge

A

> 0.02m3

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10
Q

Smelly additive

A

Tetrahydrothiophene

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11
Q

Service side is …

A

Upstream

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12
Q

Installation side is …

A

Downstream

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13
Q

Heat shield air gap

A

5mm

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14
Q

Fire spigot

A

15 mm- no closer than 50mm to wall

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15
Q

Terminal opening size (2)

A

6-16mm
Or > 170mm

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16
Q

Flue damper needs to be

A

Mechanically fixed/ removed

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17
Q

Starter blocks needed on pre cast

A

3

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18
Q

Cover blocks required pre cast

A

1

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19
Q

Open flue minimum before bend

A

600mm

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20
Q

Hearth size requirements (4)

A

Back of fire to hearth 300mm
Min from burner 150mm
Min 50mm thick, 12mm non combustible
50mm upstand

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21
Q

Single wall orientation

A

W bottom - M top (guttering)

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22
Q

Twin wall orientation

A

M bottom - W top

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23
Q

Inspection hatch size

A

300 x 300mm

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24
Q

Inspection hatch distance

A

1.5m max from any joints/ COD

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25
Q

To be found on cast iron heat exchangers

A

Shale

26
Q

Maximum shut off time: Back boiler/ boiler

A

60

27
Q

Maximum shut off time: Warm air

A

60

28
Q

Maximum shut off time: Instant water heater

A

60

29
Q

Maximum shut off time: Radiant/ convector gas fire

A

180

30
Q

Maximum shut off time: DFE

A

60

31
Q

Maximum shut off time: Storage water heater, up to 35kW Net

A

60

32
Q

Maximum shut off time: Storage water heater, above 35kW Net

A

45

33
Q

Maximum shut off time: Circulator

A

60

34
Q

Maximum shut off time: Circulator

A

60

35
Q

Maximum shut off time: Cooker w/ oven enclosed burner

A

60

36
Q

Maximum shut off time: Cooker, hot plate & grills (open burner)

A

90

37
Q

Multifunctional gas valve, components (5)

A

Inlet test point
Burner test point
Pilot adjuster
Burner adjuster
Operating button

38
Q

OF Flue components (4)

A

Primary flue
Secondary flue
Draught diverter
Terminal

39
Q

Draught diverter purposes (3)

A

Diverts draught away from primary flue
Allows POCs to be diluted
Breaks the pull of the secondary flue

40
Q

Proprietary system: high level per kW

A

12.5cm2

41
Q

Non-proprietary system: low(er) level per kW

A

7.5 cm2

42
Q

What needs to be fitted after AECV and within what measurement

A

Test point within 300mm

43
Q

Landlord certificate number

A

CP12

44
Q

DFE minimum flue diameter unless stated by MIs

A

175mm

45
Q

Types of meter box (4)

A

Built in
Surface mounted
Semi concealed
Universal

46
Q

Imperial gas rate calculation

A

3600/ time taken
x 1040
/ 3412
/1.11

47
Q

Metric gas rate calculation

A

2 mins x 30
x 10.76
/ 1.11

48
Q

Gas rate tolerance

A

5% above
10% below

49
Q

Only gas pipe allowed within a cavity if attached to what appliance

A

ILFE

50
Q

OF terminal requirements (3)

A

Sealing/ clamping plate
Cement flaunching
Terminal

51
Q

OF flue liner: Components (5)

A

Register/ debris plate
Flue liner
Sealing/ clamping plate
Cement flaunching
Terminal

52
Q

Pipe in solid floor depth

A

Atleast a 25mm cover

53
Q

OF Chimney support distance

A

1.8m/ COD

54
Q

The air pulled drawn in by air ports on the burner

A

Primary air

55
Q

The air around the flame is referred to as.

A

Secondary air

56
Q

Combustion air that is deficient in oxygen..

A

Vitiated

57
Q

Flames touching or joining together

A

Impingement

58
Q

Interference with flames causing them to cool.

A

Flame chilling

59
Q

Cross sectional area of round/ rectangular flues

A

12000 mm2 Round
16500 mm2 Rectangular, minimum diameter greater than 90mm

60
Q

Minimum void dimensions below appliance connection: Previously used with solid fuel / oil

A

250 mm (0.012m3/12 litres)

61
Q

Minimum void dimensions below appliance connection: Previously used with gas

A

75mm (0.002m3/ 2 litres)

62
Q

What is usually incorporated on burners to help prevent flame lift?

A

Flame retention

Gas (5 decks)

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