Module 12 Chimney Standards

Question 1

What is a chimney?

a) Structure enclosing a flue(s)
b) Passage to convey combustion products to the outside
c) a + b

Answer 1

a) Structure enclosing a flue(s)

Question 2

What is a flue?

a) Structure enclosing a flue(s)
b) Passage to convey combustion products to the outside
c) a + b

Answer 2

b) Passage to convey combustion products to the outside

Question 3

The width of a hearth should be:

a) 500mm
b) 750mm
c) 1000mm

Answer 3

a) 500mm

Question 4

The minimum thickness of a hearth should be:

a) 100mm
b) 125mm
c) 150mm

Answer 4

b)125mm

Question 5

A hearth can be made of:

a) brick
b) tile
c) concrete
d) any of the above

Answer 5

c) concrete

Question 6

A flue must contain a circle of a minimum diameter of:

a) 75mm
b) 125mm
c) 150mm
d) 175mm

Answer 6

d) 175mm

Question 7

The maximum angle a flue can be is:

a) 33 degrees
b) 45 degrees
c) 66 degrees
d) 90 degrees

Answer 7

b) 45 degrees

Question 8

For new installations a flue must be lined with:

a) Clay linings to BS EB 1457
b) Kiln burnt aggregate and high alumina cement linings
c) Clay pipes and fittings to BS65
d) All of the above

Answer 8

d) All of the above

Question 9

In new installations are stainless steel linings recommended or not?

a) Yes
b) No

Answer 9

b) No

Why?
They corrode and disintegrate from gases and condensation produced by solid fuel

Question 10

Can an existing chimney, in good condition, be used unlined if the dimensions are greater than 225 x 225mm (9 x 9)

a) Yes
b) No

Answer 10

a) Yes

Question 11

With an existing chimney why may you need to line it?

Answer 11

a) Signs of loose brick / mortar
b) Leakage of combustion products into rooms

Question 12

What is 1 called in the picture?

Answer 12

Closure Plate

Question 13

What is 2 called in the picture?

Answer 13

Flue Spigot

Question 14

If an appliance is fitted in an unlined brick chimney what should the void depth and volume be?

a) 250mm / 12 litres
b) 250mm / 0.002m3
c) Both of the above

Answer 14

a) 250mm / 12 litres

Question 15

If an appliance is fitted in a lined chimney that has never been used for solid fuel or oil what should the void depth and volume be?

a) 250mm / 12 litres
b) 75mm / 0.002m3
c) 250mm / 2 litres
d) Any of the above

Answer 15

b) 75mm / 0.002m3

Question 16

If an appliance is fitted in a lined chimney that has previously been used for solid fuel or oil what should the void depth and volume be?

a) 250mm / 0.012 m3
b) 75mm / 2 litres
c) 250mm / 2 litres

d) Any of the above

Answer 16

a) 250mm / 0.012 m3

Question 17

If an appliance is fitted into a flue block/metal chimney which has never been used with solid fuels or oil what should the void depth and volume be?

a) 250mm / 0.012 m3
b) 75mm / 2 litres
c) 250mm / 2 litres
d) Any of the above

Answer 17

b) 75mm / 2 litres

Question 18

If an appliance is fitted into a flue block/metal chimney which has previously been used with solid fuels or oil what should the void depth and volume be?

a) 250mm / 0.012 m3
b) 75mm / 2 litres
c) 250mm / 2 litres
d) Any of the above

Answer 18

a) 250mm / 0.012 m3

Question 19

Can new chimneys be constructed unlined?

a) Yes
b) No
c) Doesn’t matter

Answer 19

b) No

Question 20

The gas appliance classification for a flueless appliance is:

a) A
b) B
c) C
d) None of the above

Answer 20

a) A

Question 21

The gas appliance classification for a open flued appliance is:

a) A
b) B
c) C
None of the above

Answer 21

b)B

Question 22

The gas appliance classification for a room sealed appliance is:

a) A
b) B
c) C
None of the above

Answer 22

c) C

Question 23

If a chimney is unlined or lined but previously been used with oil or solid fuels the void depth and volume should be:

a) 75mm / 0.012 m3
b) 250mm / 12 litres
c) 75mm / 2 litres
d) 250mm / 0.002 m3

Answer 23

b) 250mm / 12 litres

Question 24

If the flue uses thermal convection to aid the removal of combustion products is it:

a) Forced draft
b) Natural draft
c) Flue draft

Answer 24

b) Natural draft

Question 25

Which of the following is a function of a draft diverter:

a) diverts down draft in the secondary flue
b) allows flue products to be diluted
c) breaks the pull of the secondary flue
d) all of the above

Answer 25

d) all of the above

Question 26

What does the image depict?

Answer 26

A draft diverter