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PCA Certificated Surveyor of Dampness in Buildings Sample Questions:

1. The surveyor should investigate the external envelope when diagnosing penetrating damp to:

A) Ignore it
B) Identify and record defects causing the damp ingress
C) Record aesthetic features only
D) Always recommend cavity wall insulation

2. Replastering after DPC installation should use:

A) No plaster
B) Standard lime mortar immediately
C) Specialized low-salt plaster after sufficient drying and salt removal, with compatible finishes
D) Concrete

3. During a survey of a cavity wall building, the surveyor observes damp patches internally that are largest after periods of heavy rain and are concentrated around a section of failed external pointing. A moisture meter reading shows 22% at the damp area. The cavity appears to contain insulation material. What is the recommended priority action?

A) Install internal membrane behind affected plasterwork
B) Remove all cavity insulation immediately
C) Inspect external pointing condition and cavity integrity; repair external defects as priority
D) Apply internal waterproof coating

4. Black mould (typically Aspergillus or Penicillium species) associated with condensation:

A) Is harmless
B) Is beneficial
C) Only affects exterior surfaces
D) Can cause respiratory problems, particularly for vulnerable people such as the very young, elderly, or those with asthma

5. BS 5250:2021 states that relative humidity should ideally be maintained below:

A) 85-90%
B) 65-70%
C) 30%
D) 50%

Solutions: