Chapter 8: External solid plastering

Candidate name: Candidate number: Date: Chapter 8: External solid plastering Circle the correct answers. 1 Which of the following is required for preparing new blockwork for a plainfloat finish? a Coating blockwork with PVA b Damping down of blockwork c Hacking with a lath hammer d Raking out of joints to blockwork 2 Which of the following is a latex-based adhesive used to form a key for external render? a PVA b ERA c SBR d EML 3 In traditional external cement-based renders in which coat is the waterproofer added? a Dubbing out coat b Floating coat c Top coat d Render coat 4 The scratch/render coat should be applied at: a 6 to 8 mm thick b 9 to 12 mm thick c 12 to 14 mm thick d 13 to 16 mm thick 5 What is the purpose of a bell-cast bead? a To give a decorative finish b Protect angles around the building c Direct rainwater from the face of the building d To hide poor-quality finish Plastering NVQ and Technical Certificate Level 2 Tutor Resource Disk 1 of 1

6 If a strong cement-based external render is applied on top of a weaker mix it will: a Make the render become lose b Improve the wearing properties of the finish c Help to achieve a better quality finish d Improve the waterproofing of the finish 7 The correct mix proportion for a render coat for external rendering is: a 2 to 1 plus waterproofer b 4 to 1 no waterproofer c 2 to 1 no waterproofer d 4 to 1 plus waterproofer 8 The best type of sand for external rendering to improve its weather proofing is: a Medium sharp b A good soft builder s sand c As sharp as can be spread easily d A coarse builder s sand 9 When applying the top coat for an external rendering, the type of suction you may find is: a Medium, low suction b High suction c No suction d Very high suction 10 The finishing coat for external render will require: a Box screeds b Broad screeds c Plumb and dot d No screeds 11 What is the purpose of an expansion bead? a To form panels on the wall b To make a break between different materials c To allow for movement in the background d To form a feature at the bottom of the wall 12 How should external cement work be cured? a Throw buckets of water onto the render straight after completion b Hose down cement finish two weeks after finishing c A light hosing 24 hours after finishing d Gently tip water down render face straight after finishing Plastering NVQ and Technical Certificate Level 2 Tutor Resource Disk 2 of 2

13 What thickness of render should be applied for the finishing coat? a 4 to 6 mm b 7 to 9 mm c 10 to 12 mm d 13 to 15 mm 14 Which of the following is the most common fault found in external render finishes? a Pattern staining b Surface crazing c Colour changes d Efflorescence staining 15 Which of the following methods is used for fixing external rendering beads? a Plaster dabs b Neat cement c Rendering mix d Small headed nails Plastering NVQ and Technical Certificate Level 2 Tutor Resource Disk 3 of 3

Chapter 8: External solid plastering Answers 1 Which of the following is required for preparing new blockwork for a plainfloat finish? a Coating blockwork with PVA b Damping down of blockwork c Hacking with a lath hammer d Raking out of joints to blockwork 2 Which of the following is a latex-based adhesive used to form a key for external render? a PVA b ERA c SBR d EML 3 In traditional external cement-based renders in which coat is the waterproofer added? a Dubbing out coat b Floating coat c Top coat d Render coat 4 The scratch/render coat should be applied at: a 6 to 8 mm thick b 9 to 12 mm thick c 12 to 14 mm thick d 13 to 16 mm thick 5 What is the purpose of a bell-cast bead? a To give a decorative finish b Protect angles around the building c Direct rainwater from the face of the building d To hide poor-quality finish Plastering NVQ and Technical Certificate Level 2 Tutor Resource Disk 4 of 4