Deck 19: Plasters and Plasterboards

Question 1

One attribute of using plaster or plasterboard on a wall or ceiling is

A) It makes the surface stronger
B) It reduces the porosity of the surface
C) It reduces the sound absorption of the surface
D) It improves the fire resistance of the surface
E) It increases the U-value of the surface

Answer 1

D

Question 2

Plasters are made from

A) Alum
B) Gypsum
C) Sodium
D) Magnesium
E) Potash

Answer 2

B

Question 3

One disadvantage of plaster of Paris is

A) It cannot be applied to plasterboard
B) It is not suitable for use in plaster repairs
C) It has a very fast setting time
D) It has a very slow setting time
E) It cannot be applied to concrete surfaces

Answer 3

C

Question 4

One advantage of Keene's Plaster is

A) It can be used as a base coat plaster
B) It can be applied by a projection machine
C) It produces a very hard surface finish
D) It is less expensive than Sirapite Plaster
E) It sets very quickly

Question 5

Lightweight plasters incorporate

A) Crushed Pumice
B) Shredded Bauxite
C) Expanded Perlite
D) Extended Mica
E) Augmented Calcite

Question 6

Expanded metal lathing is used to

A) Provide a key on smooth surfaces
B) Increase the resistance to abrasion of the plaster
C) Increase the resistance to indentation of the plaster
D) Reduce the thickness of plaster used on uneven backgrounds
E) Even out the absorption characteristics of the background

Question 7

Jute scrim is used to

A) Bond the finishing coat to the base coat
B) Reinforce the plaster at junctions of dissimilar materials
C) Strengthen the plaster applied to fibreboard
D) Increase the flexibility of plaster applied to timber backgrounds
E) Reinforce the joints between sheets of plasterboard

Question 8

One advantage of plank plasterboard is

A) It is heavier than other types of plasterboard
B) It is lighter than other types of plasterboard
C) It provides improved thermal performance
D) It provides improved strength
E) It provides improved condensation absorption

Question 9

One advantage of lath plasterboard is

A) It has a vapour control membrane incorporated
B) It can be decorated directly
C) It provides improved sound insulation
D) It is suitable for use in lightweight partitioning systems
E) The sheets are small in size

Question 10

Polyvinyl acetate emulsion is often used to

A) Improve the setting time of plaster
B) Even out the absorption characteristics of the background
C) Enhance the smoothness of the finish to plaster
D) Reduce the amount of water used in the mixing of plaster
E) Prevent the occurrence of efflorescence on plaster surfaces