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Prepare CSDB Exam Questions [2026] Recently Updated Questions
NEW QUESTION # 25
Personal Protective Equipment (PPE) should be provided:
- A. As the primary control method
- B. Only if employees request it
- C. Never
- D. As the last resort when all other control measures are inadequate
Answer: D
NEW QUESTION # 26
Cavity wall insulation can trap moisture if:
- A. It is grey in colour
- B. It is too thick
- C. It is installed during summer
- D. It is not installed correctly or if the cavity ventilation is blocked
Answer: D
NEW QUESTION # 27
A property shows damp with characteristic black mould appearing in winter only, no salt deposits, high relative humidity (70%+), and visible condensation on windows. The cause is most likely:
- A. Structural failure
- B. Penetrating damp
- C. Rising damp
- D. Condensation from occupancy, inadequate ventilation, and poor heating
Answer: D
NEW QUESTION # 28
The Health and Safety at Work etc. Act 1974 places responsibility for workplace safety primarily on:
- A. The employer
- B. Building owners
- C. Individual employees only
- D. The Health and Safety Executive only
Answer: A
NEW QUESTION # 29
A property has rising damp. The surveyor identifies that previous treatment involved only internal moisture- blocking paint without chemical DPC installation. The reason this was ineffective is:
- A. Paint does not address the moisture source (ground moisture); treating the source with DPC is required
- B. Rising damp cannot be treated
- C. Paint was correct approach
- D. Paint prevented evaporation, potentially increasing internal damp
Answer: A
NEW QUESTION # 30
When conducting a dampness diagnosis, a surveyor's primary legal duty under Common Law is:
- A. To always recommend expensive treatments
- B. To diagnose using only one method
- C. To exercise reasonable professional skill and care
- D. To always find dampness
Answer: C
NEW QUESTION # 31
Rising damp is moisture that:
- A. Falls from the roof
- B. Is caused by condensation only
- C. Enters through windows
- D. Travels upward from the ground through capillary action in masonry
Answer: D
NEW QUESTION # 32
Mechanical ventilation systems (such as heat recovery ventilation) help control condensation by:
- A. Eliminating all air movement
- B. Providing continuous fresh air supply while retaining heat, maintaining adequate air change rates
- C. Reducing heating
- D. Increasing moisture
Answer: B
NEW QUESTION # 33
Black mould identification in buildings should note that:
- A. Mould is purely cosmetic
- B. All mould is identical
- C. Appearance varies; confirmation requires testing; health risks exist particularly for vulnerable occupants
- D. Mould has no health implications
Answer: C
NEW QUESTION # 34
A surveyor is diagnosing damp in a Victorian terraced property built in 1885. The property lacks a DPC and shows clear tide marks at 600mm above floor level with white salt crystals. The surveyor performs a calcium carbide test which shows 18% moisture content. What is the most likely diagnosis?
- A. Leaking pipework
- B. Condensation with salt efflorescence
- C. Rising damp confirmed by multiple diagnostic methods
- D. Penetrating damp from failed pointing
Answer: C
NEW QUESTION # 35
To differentiate penetrating damp from rising damp, the surveyor should note:
- A. Penetrating damp causes tide marks; rising damp does not
- B. Rising damp appears as tide marks from ground level; penetrating damp patches vary with external defects and rainfall exposure
- C. They look identical
- D. Rising damp occurs above 1000mm; penetrating damp below 500mm
Answer: B
NEW QUESTION # 36
BS 5250:2021 states that relative humidity should ideally be maintained below:
- A. 50%
- B. 85-90%
- C. 30%
- D. 65-70%
Answer: D
NEW QUESTION # 37
According to BS 5250:2021, moisture management in buildings requires consideration of:
- A. Thermal performance only
- B. Structural design only
- C. Thermal performance and moisture performance
- D. Aesthetic performance only
Answer: C
NEW QUESTION # 38
To treat penetrating damp effectively, the surveyor's primary recommendation should be:
- A. Ignore external factors
- B. Never repair external defects
- C. Apply DPM internally only
- D. Identify and repair the source (external defects) rather than applying internal treatments
Answer: D
NEW QUESTION # 39
When assessing timber decay (particularly dry rot - Serpula lacrymans) in relation to dampness, the surveyor must understand that:
- A. Dry rot causes damp
- B. Fungal decay stops growth when treated with biocide alone
- C. Damp above 20% moisture content creates conditions for fungal growth; treating damp is essential for timber remediation
- D. Damp and decay are unrelated
Answer: C
NEW QUESTION # 40
A semi-detached bungalow presents with condensation on windows, black mould in corners, and elevated moisture readings (65% RH recorded). The occupants report cooking smells lingering and no ventilation in kitchen. There are no salt deposits, no tide marks, and moisture appears only in winter. What diagnostic approach is most appropriate?
- A. Recommend rising damp investigation
- B. Assess ventilation adequacy, moisture generation, heating levels, and recommend extraction ventilation
- C. Recommend immediate chemical DPC installation
- D. Install external render to prevent moisture
Answer: B
NEW QUESTION # 41
To control condensation, the primary measure is to:
- A. Reduce relative humidity by improving ventilation, increasing heating, and reducing moisture generation
- B. Apply paint only
- C. Seal all openings
- D. Eliminate all moisture generation
Answer: A
NEW QUESTION # 42
When moisture meter readings are inconsistent across multiple measurements in the same wall section, the surveyor should:
- A. Report only the highest reading
- B. Report only one reading
- C. Average the readings uncritically
- D. Investigate causes of variation (salts, temperature, material differences), document findings, and note limitations in interpretation
Answer: D
NEW QUESTION # 43
Modern buildings typically incorporate a DPM (Damp Proof Membrane) at:
- A. Ground floor level to create a barrier against ground moisture
- B. Doors only
- C. Windows only
- D. Roof level only
Answer: A
NEW QUESTION # 44
When environmental factors (external temperature, solar gain, rainfall timing) affect damp diagnosis, the surveyor should:
- A. Assume standard conditions always
- B. Record environmental conditions at inspection; note how conditions may affect findings and interpretation
- C. Only measure indoors
- D. Ignore environmental factors
Answer: B
NEW QUESTION # 45
Characteristic features of rising damp include:
- A. Tide marks with salt deposits increasing upward from ground level
- B. Only during summer months
- C. Random patches at all levels
- D. Only on the ceiling
Answer: A
NEW QUESTION # 46
When a surveyor recommends cavity wall tie replacement due to corrosion from penetrating damp, this is important because:
- A. All ties fail equally
- B. Corroded ties can lose structural integrity, affecting wall stability and cavity function
- C. Ties are non-structural
- D. Ties are irrelevant to damp
Answer: B
NEW QUESTION # 47
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