Screed Unit 223

What 2 materials are needed to make a screed

• Sand and Cement

• Sand and lime

• Lime and Cement

• Sand, cement and waterproofer

Answer explanation

To make a screed, the primary materials required are sand and cement. These components create a strong and durable mixture, essential for leveling surfaces in construction.

What type of sand should be used for floor screeds?

• Sharp sand

• Beach sand

• Sliver sand

• Wet sand

Answer explanation

Sharp sand is the ideal choice for floor screeds due to its angular grains, which provide better bonding and strength. Other types like beach sand or sliver sand do not offer the same structural integrity.

What is the name of the tool in the image?

• Plastering Trowel

• Flooring Trowel

• Flooring Float

• Pointed Trowel

Answer explanation

The tool in the image is a Flooring Trowel, which is specifically designed for spreading and smoothing flooring materials. Unlike other trowels, it has a wider blade suited for flooring applications.

Which document will tell you the required thickness of the floor?

• Specification

• Risk Assessment

• Method statement

• On the back of a bag of cement

Answer explanation

The specification outlines the required thickness of the floor, detailing material and construction standards. Other documents like risk assessments and method statements do not provide specific thickness requirements.

Before you rule off the screeds you must do what to the floor mix?

• Compact it

• Leave it set for an hour

• Nothing

• Check it has the right amount of sand in it

Answer explanation

Before ruling off the screeds, you must compact the floor mix to ensure it is stable and properly set. This step is crucial for achieving a solid foundation.

How do we calculate floor screed

• Area

• Height

• Volume

• Linear

Answer explanation

To calculate floor screed, we need to determine the volume, which is found by multiplying the area by the height. Therefore, the correct choice is 'Volume'.

What is a major hazard of using cement

• Itches

• Cause a rash

• trips

• Burns

Answer explanation

Cement can cause chemical burns due to its alkaline nature. When it comes into contact with skin, it can lead to severe irritation and burns, making 'Burns' the major hazard associated with its use.

What is the name of the line set around the perimeter of the room called?

• TBM

• OBM

• Height

• Datum

Answer explanation

The line set around the perimeter of a room is called a 'Datum'. It serves as a reference point for measurements and layout, ensuring consistency in construction and design.

What is the name of the process to allow screed to fully set?

• Hardening

• Curing

• Aiding

• Healing

Answer explanation

The process that allows screed to fully set is called curing. Curing involves maintaining adequate moisture, temperature, and time to ensure proper hydration of the cement, leading to optimal strength and durability.

What is the name of a type of floor which has DPM between the substrate and screed?

• Unbonded

• Bonded

• Underfloor heating

• Floating

Answer explanation

An unbonded floor has a damp proof membrane (DPM) placed between the substrate and the screed, allowing for movement without bonding. This distinguishes it from bonded, floating, or underfloor heating types.