Task 1 cavity

Multiple Choice

Why is it important to prevent mortar droppings from building up at the bottom of a cavity wall?

• To avoid structural damage

• To prevent moisture from traveling across the cavity

• To make the wall look cleaner

• To reduce construction costs

Open Ended

How do cavity battens contribute to maintaining a clean cavity wall during construction?

Multiple Choice

What is efflorescence and how can it be prevented on new brick surfaces?

• A white deposit caused by mineral salts, preventable by good practice

• A mold growth due to moisture, preventable by painting

• A rust formation from metal, preventable by sealing

• A stain from pollution, preventable by washing

Open Ended

Explain the purpose of core holes in brickwork and how they contribute to maintaining a clean cavity wall.

Multiple Choice

Which of the following statements about lapped DPC is correct?

• If a DPC roll is too short, overlap by at least 100mm to prevent rising damp.

• If a DPC roll is too short, overlap by at least 50mm to prevent rising damp.

• If a DPC roll is too short, overlap by at least 200mm to prevent rising damp.

• If a DPC roll is too short, no overlap is needed.

Multiple Select

Select all features that cavity trays provide in brickwork.

• Prevent dampness from permeating the internal wall skin

• Direct moisture to the outside

• Increase structural strength

• Are commonly placed above window/door openings and DPC level

Open Ended

Describe how weep holes function in brickwork and why they are important for moisture control.

Multiple Choice

What is the primary purpose of a cavity lintel in brickwork construction?

• To carry the load above openings

• To provide insulation

• To connect inner and outer skins

• To protect bricks from cold weather

Multiple Choice

What hammer is used for cutting a brick/block with a bolster chisel?

• Club hammer

• Sledge hammer

• Claw hammer

• Ball pein hammer

Open Ended

Explain why newly laid bricks need to be protected in cold weather and describe the best method to do so.

Multiple Choice

Which components are typically included in a cavity wall design to improve energy efficiency?

• Wall ties

• DPC

• Insulation

• All of the above

Multiple Select

Select all methods used for installing insulation in a cavity wall.

• Full fill

• Partial fill

• Injection

• Surface coating

Open Ended

How do cavity battens help maintain a clean cavity wall, and why is this important for the structure?