Mixed Deck — All CSCS Topics Flashcards

What does the term 'RPE' stand for on a construction site?

Answer: Respiratory Protective Equipment

RPE stands for Respiratory Protective Equipment, which includes disposable masks, half-face and full-face respirators, powered air-purifying respirators (PAPRs), and self-contained breathing apparatus (SCBA).

What protective measures must be in place to prevent vehicles from driving into an open excavation on a construction site?

Answer: Physical barriers such as stop blocks, guardrails, and banksmen must be used, along with signage and adequate lighting at night

Under CDM Regulations 2015, physical measures such as stop blocks (to prevent vehicles overrunning the edge), substantial guardrails, and the use of banksmen for vehicle manoeuvring near excavations are required. Signage must warn of the excavation, and adequate lighting must be provided during hours of darkness. Tape alone is not a sufficient barrier.

Why is smoking particularly dangerous for workers who have been exposed to asbestos?

Answer: Smoking combined with asbestos exposure increases the risk of lung cancer by up to 50 times compared to someone who neither smokes nor is exposed to asbestos — the two risk factors are synergistic

Smoking and asbestos exposure have a synergistic (multiplicative) effect on lung cancer risk. While asbestos exposure alone increases lung cancer risk by approximately 5 times and smoking alone by approximately 10 times, the combined exposure increases the risk by up to 50 times. This is why health surveillance programmes for asbestos workers strongly advise smoking cessation.

What is the legal framework for controlling vibration from construction activities that affects neighbouring properties?

Answer: Vibration is controlled under the Environmental Protection Act 1990 (statutory nuisance), BS 5228-2 (Code of practice for noise and vibration control on construction sites), and planning conditions — vibration limits at sensitive receptors must be monitored and complaints investigated

Construction vibration is controlled by: the Environmental Protection Act 1990 (vibration can constitute a statutory nuisance); BS 5228-2:2009+A1:2014 (provides guidance on vibration prediction, measurement, and control); planning conditions (often set vibration limits at sensitive receptors); and the Party Wall etc. Act 1996 (for work affecting adjoining properties). Continuous vibration monitoring at nearby properties is often required, with trigger and stop limits.

When should a manual handling risk assessment be reviewed?

Answer: When there is a significant change in the operation, or if the assessment is no longer valid

Manual handling risk assessments should be reviewed when there is a significant change in the task, load, working conditions, or personnel, when an incident occurs, or when the assessment is no longer considered valid.

How is daily noise exposure typically measured on a construction site?

Answer: Using a sound level meter or personal noise dosimeter

Daily noise exposure is measured using calibrated sound level meters (for task-based measurements) or personal noise dosimeters (worn by the worker throughout the shift). Measurements must be carried out by a competent person and the equipment must be properly calibrated.

What is a Waste Transfer Note and when is it required on a construction site?

Answer: A Waste Transfer Note must accompany every transfer of non-hazardous controlled waste and must include a description of the waste, the quantity, the carrier's details, and the destination — it must be kept for at least 2 years

Under Section 34 of the Environmental Protection Act 1990 and the Waste (England and Wales) Regulations 2011, a Waste Transfer Note (WTN) must be completed for every transfer of non-hazardous waste. It must include a written description of the waste, SIC code, quantity, container type, and details of both parties. WTNs must be retained for a minimum of 2 years. Hazardous waste requires consignment notes kept for 3 years.

What sustainable practices should a construction site adopt to reduce its carbon footprint?

Answer: Using fuel-efficient plant, minimising vehicle movements, switching to electric or hybrid machinery, reducing waste through prefabrication, sourcing materials locally, using renewable energy for site offices, and implementing idle-time shutdown policies for plant and equipment

The Construction (Design and Management) Regulations 2015 and PAS 2080 encourage carbon reduction throughout construction. Practical measures include: fuel-efficient and electric/hybrid plant; consolidated deliveries to reduce vehicle movements; prefabrication to reduce on-site waste; local material sourcing; renewable energy for temporary accommodation; idle-time shutdown policies; and LED site lighting. Many clients now require carbon reporting as part of contract requirements.

What is a hot work permit and when is it required?

Answer: A written authorisation required before any work involving open flames, sparks, or heat sources that could start a fire

A hot work permit is a formal written authorisation required before welding, cutting, grinding, or any work that produces sparks, flames, or heat. It specifies precautions including fire watch, extinguisher provision, and clearance of combustible materials.

What is a permit to work system?

Answer: A formal written system that authorises specific high-risk work, defining the precautions required and the persons responsible

A permit to work is a formal documented procedure for controlling high-risk activities such as hot work, confined space entry, electrical isolation, and work at height over water. It specifies the task, hazards, precautions, responsible persons, and time limits, and must be signed off before work begins and on completion.

What is a Workplace Exposure Limit (WEL)?

Answer: The legal maximum concentration of a hazardous substance in workplace air, averaged over a reference period

A Workplace Exposure Limit (WEL) is the maximum concentration of an airborne substance, averaged over a specified reference period (typically 8 hours TWA or 15-minute STEL), to which workers may be exposed. WELs are listed in HSE publication EH40.

What is the purpose of a Section 61 consent under the Control of Pollution Act 1974?

Answer: It is a prior consent obtained from the local authority before construction work begins, agreeing the methods, hours, and noise levels for the works — it provides the contractor with a defence against noise nuisance complaints if the agreed conditions are followed

A Section 61 consent under the Control of Pollution Act 1974 is a voluntary prior agreement with the local authority covering construction methods, working hours, noise levels, and mitigation measures. The key benefit is that it provides a defence against prosecution for noise nuisance under the Environmental Protection Act 1990, provided the agreed conditions are followed. It also demonstrates good practice and community consideration.

Under UK regulations, how often should fire drills be carried out on a construction site?

Answer: At regular intervals, typically every 6 months or when there are significant changes to the site layout

Fire drills should be carried out at regular intervals to ensure all workers know the evacuation procedure. On construction sites where layouts change frequently, drills may need to be more frequent than in fixed premises.

What is a musculoskeletal disorder (MSD) in the context of manual handling?

Answer: An injury or disorder affecting the muscles, joints, tendons, ligaments, or nerves

Musculoskeletal disorders (MSDs) affect the body's movement system — muscles, joints, tendons, ligaments, nerves, and spinal discs. Common examples include back pain, repetitive strain injuries, and work-related upper limb disorders.

What does the abbreviation 'CTE' stand for in relation to 110V site transformers?

Answer: Centre-Tapped Earth

CTE stands for Centre-Tapped Earth. A 110V CTE transformer takes a 230V supply and steps it down to 110V, with the secondary winding centre-tapped to earth. This means the maximum voltage to earth is only 55V, which is considered a non-lethal level and provides enhanced safety on construction sites as required by BS 7671.

Under COSHH, what is the meaning of 'adequate control' of exposure?

Answer: Reducing exposure to as low as is reasonably practicable and, for substances with a WEL, ensuring that limit is not exceeded

Under COSHH, adequate control means reducing exposure to as low as is reasonably practicable. For substances with a WEL, exposure must not exceed that limit. For carcinogens, mutagens, and substances with no WEL, the duty is to reduce exposure as far as is reasonably practicable, applying the hierarchy of control.

What is the purpose of traffic management on a construction site?

Answer: To safely manage the movement of all vehicles, plant, and pedestrians on site, minimising the risk of collisions and struck-by incidents

Traffic management plans ensure the safe movement of vehicles, plant, and pedestrians on site. Key elements include one-way systems, designated pedestrian routes with barriers, speed limits, turning areas, adequate visibility, lighting, signage, banksmen at blind spots, and separation of vehicle and pedestrian routes wherever possible.

What is the HSE's recommended approach to preventing falls through fragile roofs?

Answer: Use crawling boards or staging, install nets below, and assume all roofs are fragile unless proven otherwise

HSE guidance states that you should assume all roofs are fragile unless a competent person has confirmed otherwise. Use crawling boards or staging to spread the load, install safety nets below, and provide clear warning signs.

What obligation does an employer have regarding the provision of hearing protection at the upper exposure action value of 85 dB(A)?

Answer: The employer must ensure hearing protection is provided AND worn by all exposed workers

At or above the upper exposure action value of 85 dB(A), employers must ensure that suitable hearing protection is not only provided but actually worn by all exposed workers. This is a mandatory requirement, unlike at the lower action value where hearing protection only needs to be made available.

What is the danger of using a 230V supply for portable equipment on a construction site instead of 110V CTE?

Answer: The maximum voltage to earth is 230V rather than 55V, greatly increasing the risk of fatal electrocution particularly in wet or damp conditions

With a 230V supply, the full 230V appears between any live conductor and earth. With 110V CTE, the maximum voltage to earth is only 55V. The IET and HSE confirm that 55V is unlikely to cause a fatal shock even in adverse conditions, whereas 230V can kill instantly. This is why HSE guidance and BS 7671 mandate 110V CTE for portable construction site equipment.