Unit 122/124 Scratch/Floating Coats

Which one of the following is applied to an internal wall to even out suction?

• Dubbing out.

• Setting coat.

• Pricking up coat.

• Scratch coat.

Which one of the following materials improves workability of a mix for scratch coats?

• Lime.

• Sand.

• Cement.

• Retarder.

Which one of the following is a general purpose cement for a scratch coat?

• High alumina cement.

• White portland cement.

• Blended cement.

• Ordinary portland cement.

Which of the following is the generally preferred sand:cement mix used for a scratch coat?

• 1:1

• 2:1

• 4:1

• 6:1

Which one of the following tools is required to form a hard angle on a return when applying scratch coats?

• Gauging trowel.

• Plastic float.

• Comb scratcher.

• Feather edge.

What is the tool is used to measure out powder?

• Bucket trowel.

• Pointing trowel.

• Gauging trowel.

• Angle trowel.

The process called "scratch coat" is important because?

• forms a mechanical key

• controls the suction

• dubs out hollows

• slows down the set.

What is the main reason for using a brush to apply a slurry adhesive?

• Consistent coverage.

• Reduced waste.

• Improved appearance.

• Modern method.

In bonding grade plaster, the aggregate is

• sand

• cement

• lime

• vermiculite.

Which of the following lightweight undercoat plasters provides the best impact resistance?

• Browning.

• Bonding.

• Hardwall.

• Renovating.