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What kind of bricks are recommended to build a brick inspection chamber?
Clay common brick
Engineering brick
Facing brick
Sand-lime brick
Why is English bond an excellent bond to use for an inspection chamber?
It is aesthetic
It is one of the weakest bonds and allows for movement
You need fewer bricks to build the wall
It is a strong bond which resists structural forces
How many bricks per m2 are typically needed for an inspection chamber?
60
120
180
20
A rocker pipe is a joint that allows slight movement so that the drainage is not damaged if minor settlement occurs
Benching refers to the gradient of a pipe
What should the gauge of 4 courses measure using standard bricks?
75mm
150mm
300mm
450mm
What are step irons used for?
They are built into a wall to strengthen it below ground
They are used to create perfect 10mm joints between the bricks
They are steps built into a chamber to allow a person access
They are step ladders to allow access into a trench
Benching is made from bricks and limestone.
What should be the length of 4 standard bricks when laid lengthways on mortar?
225mm
890mm
900mm
1790mm
A suitable mix to use below ground is 1:6.
What is a suitable base for an inspection chamber?
Concrete foundation
Gravel
Clay
Hardcore
In a 1:6 mortar mix, what does the 1 refer to?
Sand
Ballast
Cement
In a 1:6 mortar mix, what does the 6 refer to?
Stone
Where should a queen closure be placed in a wall?
Any place it is needed
In the direct centre of the wall
Next to the corner header
On the bottom course for strength purposes
Bricklaying mortar is usually made using sharp sand.