NEBOSH Health and Safety Management for Construction (UK) — Questions and Answers

Question 1: What is the role of a CDM Coordinator on a domestic project under CDM 2015?

The CDM Coordinator replaced the Planning Supervisor
The CDM Coordinator replaced the Principal Designer
There is no CDM Coordinator role under CDM 2015 (Correct answer)
The CDM Coordinator is appointed by the HSE

Correct answer: There is no CDM Coordinator role under CDM 2015

The CDM Coordinator role was abolished by CDM 2015 and replaced by the Principal Designer. The Principal Designer takes on the coordination of pre-construction health and safety, a role previously performed by the CDM Coordinator.

Question 2: Construction workers are exposed to UV radiation from the sun. What is the long-term health risk and what controls should be implemented?

Vitamin D deficiency
Skin cancer (including melanoma); controls include scheduling work to avoid peak UV, providing shade, and covering exposed skin (Correct answer)
Sunburn only with no long-term effects
Eye strain from bright light only

Correct answer: Skin cancer (including melanoma); controls include scheduling work to avoid peak UV, providing shade, and covering exposed skin

Outdoor construction workers have significantly higher rates of skin cancer due to chronic UV exposure. Controls include scheduling outdoor work outside peak UV hours (11am-3pm), providing shade for break areas, wearing long-sleeved clothing and wide-brimmed hats, and applying sunscreen (minimum SPF 30). Awareness training about skin checks is also important.

Question 3: What is the safe method for testing whether electrical equipment is dead before commencing work?

Assume it is dead if the main switch is off
Use an approved voltage indicator or multi-meter to test between all conductors and earth (Correct answer)
Touch the terminal briefly with the back of your hand
Listen for buzzing sounds from the equipment

Correct answer: Use an approved voltage indicator or multi-meter to test between all conductors and earth

The only safe method is to use an approved voltage indicator (test instrument) to test between all live conductors and between each conductor and earth. The instrument itself should be tested before and after use to confirm it is working correctly.

Question 4: During excavation work, a worker discovers an uncharted gas main. What is the correct immediate action?

Continue digging carefully around it
Stop work immediately, evacuate the area, prevent ignition sources, and contact the utility emergency service (Correct answer)
Attempt to cap the pipe
Cover it over and continue work elsewhere

Correct answer: Stop work immediately, evacuate the area, prevent ignition sources, and contact the utility emergency service

If an uncharted service is discovered, all work must stop immediately. For gas mains, the area must be evacuated, all ignition sources eliminated, and the National Gas Emergency Service (0800 111 999) contacted immediately. No one should attempt to repair or interfere with the service. The incident should be investigated to determine why the service was not identified.

Question 5: What is the recommended distance from the edge of an excavation that heavy plant and spoil should be kept?

At least 2 metres from the edge
At least 3 metres from the edge
At least 1 metre from the edge (Correct answer)
At least 0.5 metres from the edge

Correct answer: At least 1 metre from the edge

Heavy plant and excavated spoil should be kept at least 1 metre from the edge of the excavation. Placing these too close can overload the ground and cause the sides to collapse, endangering workers below.

Question 6: What does the term 'inhalable dust' mean in occupational hygiene?

Particles larger than 10 micrometres that are filtered by the nose
Dust particles small enough to be inhaled through the nose and mouth, settling in the upper airways (Correct answer)
Only particles visible to the naked eye
Dust particles that reach the alveoli of the lungs

Correct answer: Dust particles small enough to be inhaled through the nose and mouth, settling in the upper airways

Inhalable dust refers to the fraction of airborne particles that can be inhaled through the nose and mouth and deposited in the upper respiratory tract. It includes particles up to approximately 100 micrometres in aerodynamic diameter.

Question 7: What is the main risk when excavating in contaminated land?

Damage to underground services
Exposure to harmful substances including toxic gases, chemicals and biological hazards (Correct answer)
Increased ground instability
Difficulty in using standard shoring equipment

Correct answer: Exposure to harmful substances including toxic gases, chemicals and biological hazards

Excavating contaminated land exposes workers to toxic gases (such as methane and hydrogen sulphide), chemicals, asbestos and biological hazards. Air monitoring and appropriate PPE including respiratory protection are essential.

Question 8: What does the 'E' in TILE stand for?

Energy
Equipment
Ergonomics
Environment (Correct answer)

Correct answer: Environment

The 'E' in TILE stands for Environment — the physical working conditions including floor surface, space available, temperature, lighting, humidity and any obstructions. Environmental factors significantly affect the risk of manual handling injury.

Question 9: At what depth does an excavation typically require a formal support system to prevent collapse?

Always at depths exceeding 3 metres
Only at depths exceeding 5 metres
When the sides cannot be safely battered back, typically from 1.2 metres (Correct answer)
At any depth in sandy soil

Correct answer: When the sides cannot be safely battered back, typically from 1.2 metres

While there is no absolute depth rule, excavations where the sides cannot be safely battered back — commonly from 1.2 metres — require a formal support system. Sandy or loose soils may require support at shallower depths.

Question 10: During construction, fire compartmentation in a building is breached by service penetrations and temporary openings. What must be done to maintain fire safety?

Leave all openings for ventilation
Install a fire alarm to compensate
Nothing — fire compartmentation is only needed in the finished building
All penetrations must be temporarily fire-stopped and openings protected to maintain compartmentation integrity (Correct answer)

Correct answer: All penetrations must be temporarily fire-stopped and openings protected to maintain compartmentation integrity

Fire compartmentation must be maintained during construction. Service penetrations through fire-rated walls and floors must be temporarily fire-stopped using intumescent materials. Temporary openings should be protected with fire-resistant coverings. Loss of compartmentation during construction has contributed to several major site fires.

Question 11: Which HSE publication provides practical guidance to help comply with health and safety law?

Enforcement Notice
Approved Code of Practice (ACoP) (Correct answer)
Improvement Notice
Prohibition Notice

Correct answer: Approved Code of Practice (ACoP)

An Approved Code of Practice (ACoP) provides practical guidance on how to comply with health and safety law. Although not legally binding, following an ACoP is considered sufficient to meet the relevant legal requirement.

Question 12: What does the acronym WEL stand for in the context of occupational exposure to dust?

Workplace Exposure Limit (Correct answer)
Working Exposure Level
Workplace Environment Level
Worker's Environmental Limit

Correct answer: Workplace Exposure Limit

WEL stands for Workplace Exposure Limit — the maximum concentration of an airborne substance (expressed as a time-weighted average) that most workers can be exposed to without causing adverse health effects. WELs are published in EH40.

Question 13: Under the Control of Substances Hazardous to Health Regulations 2002 (COSHH), what is the hierarchy of control for managing exposure to hazardous substances?

Eliminate, substitute, enclose, LEV, safe systems of work, then PPE as last resort (Correct answer)
Provide PPE first, then consider other measures
Monitor exposure and treat any health effects
Train workers and rely on their vigilance

Correct answer: Eliminate, substitute, enclose, LEV, safe systems of work, then PPE as last resort

COSHH requires a hierarchy: first eliminate the substance; if not possible, substitute with a less hazardous alternative; then use engineering controls (enclosure, local exhaust ventilation); then administrative controls (safe systems of work, reduced exposure time); and finally PPE as a last resort. PPE should never be the primary control.

Question 14: Under the Manual Handling Operations Regulations, what is the employer's duty regarding pregnant workers?

No additional duty exists for pregnant workers under MHOR
To carry out a specific risk assessment for pregnant workers and adjust duties to remove risks to them and their unborn child (Correct answer)
To automatically exclude pregnant workers from all manual handling operations
To provide a back support belt to all pregnant workers

Correct answer: To carry out a specific risk assessment for pregnant workers and adjust duties to remove risks to them and their unborn child

The MHOR require employers to assess the specific risks to pregnant workers and those who have recently given birth or are breastfeeding. Where significant risk is identified, duties must be adjusted, alternative work offered or suspension on full pay considered.

Question 15: Leptospirosis (Weil's disease) is a risk on construction sites. How is it transmitted and what workers are most at risk?

Transmitted by insect bites; workers in rural areas only
Transmitted through contact with water or soil contaminated with infected rat urine; workers in excavations, drains, and waterways are most at risk (Correct answer)
Transmitted by skin contact with cement; bricklayers are most at risk
Transmitted by airborne droplets; office workers are most at risk

Correct answer: Transmitted through contact with water or soil contaminated with infected rat urine; workers in excavations, drains, and waterways are most at risk

Leptospirosis is caused by Leptospira bacteria found in rat urine. It enters through cuts, abrasions, or mucous membranes following contact with contaminated water or soil. Construction workers in excavations, drainage work, and near waterways are at highest risk. Controls include covering cuts, washing hands, wearing gloves, and not eating or drinking near contaminated areas.

Question 16: What role does PPE play in manual handling risk control?

PPE such as gloves and safety footwear provides limited protection against injury but is not a substitute for eliminating or reducing the hazard (Correct answer)
PPE removes the need for mechanical handling aids
PPE is the most effective control measure for manual handling
Gloves eliminate the risk of manual handling injuries

Correct answer: PPE such as gloves and safety footwear provides limited protection against injury but is not a substitute for eliminating or reducing the hazard

PPE (such as gloves to improve grip and protect hands, and safety footwear to protect feet from dropped loads) provides some protection but is a last resort. It does not reduce the physical demands of the task and cannot substitute for elimination or mechanical assistance.

Question 17: What precautions should be taken when storing flammable liquids on a construction site?

Store in the site office for convenience
Store as many containers as possible to avoid frequent deliveries
Store in open containers to allow vapour to dissipate
Store in a dedicated, ventilated, fire-resisting store away from ignition sources and in quantities no more than necessary (Correct answer)

Correct answer: Store in a dedicated, ventilated, fire-resisting store away from ignition sources and in quantities no more than necessary

Flammable liquids must be stored in a designated fire-resisting store (or metal cabinet), kept well ventilated to prevent vapour build-up, away from ignition sources, and in the minimum quantity needed. Containers must be kept closed when not in use.

Question 18: What is the effect of cold working conditions on manual handling risk?

Cold only affects outdoor workers carrying very heavy loads
Cold improves muscle endurance and reduces injury risk
Cold has no significant effect on manual handling risk
Cold reduces muscle strength and flexibility, impairs grip and increases the risk of musculoskeletal injury (Correct answer)

Correct answer: Cold reduces muscle strength and flexibility, impairs grip and increases the risk of musculoskeletal injury

Cold temperatures reduce blood flow to muscles, decrease flexibility and grip strength, and slow reflexes. Workers in cold conditions tire more quickly and are less able to handle loads safely, increasing the risk of manual handling injuries.

Question 19: Which technique is used to check for the presence of underground cables using radio frequency detection?

Trial pit excavation
Ground Penetrating Radar only
Ultrasonic testing
Cable Avoidance Tool (CAT) scanning (Correct answer)

Correct answer: Cable Avoidance Tool (CAT) scanning

A Cable Avoidance Tool (CAT scanner) uses electromagnetic signals to detect buried electricity cables, gas and water mains, and other services. Used with a signal generator (genny), it significantly reduces the risk of striking services.

Question 20: Which of the following items is classified as a lifting accessory under LOLER 1998?

A wire rope sling (Correct answer)
A chain block hoist
A tower crane
A mobile elevating work platform (MEWP)

Correct answer: A wire rope sling

Wire rope slings are lifting accessories — they are used to connect the load to lifting equipment; cranes, MEWPs and chain blocks are classified as lifting equipment.

Question 21: What is the primary purpose of edge protection around an excavation?

To mark the boundary of the excavation for planning purposes
To anchor the shoring system
To prevent people and vehicles from falling into the excavation (Correct answer)
To stop soil from eroding at the edges

Correct answer: To prevent people and vehicles from falling into the excavation

Edge protection such as barriers, guard rails or close-boarded fencing prevents people (especially pedestrians) and vehicles from accidentally falling into an open excavation. It also alerts people to the presence of the hazard.

Question 22: A construction worker develops occupational asthma from exposure to isocyanates in two-pack spray paints. Under UK health and safety law, what should the employer have done to prevent this?

Provided a basic dust mask
Nothing — occupational asthma cannot be prevented
Ensured the worker was not allergic before employment
Carried out a COSHH assessment, provided LEV or RPE with assigned protection factor, health surveillance, and training on isocyanate risks (Correct answer)

Correct answer: Carried out a COSHH assessment, provided LEV or RPE with assigned protection factor, health surveillance, and training on isocyanate risks

Isocyanates are a leading cause of occupational asthma. Under COSHH, the employer must assess the risk, consider elimination or substitution (e.g., brush application instead of spraying), provide engineering controls (LEV, spray booths), supply suitable RPE with adequate assigned protection factor, implement health surveillance, and provide information and training.

Question 23: What is the minimum toe board height on a scaffold platform?

100mm
250mm
200mm
150mm (Correct answer)

Correct answer: 150mm

Toe boards on scaffold platforms must be at least 150mm high. They prevent tools, materials and debris from rolling or being kicked off the edge of the platform onto workers or members of the public below.

Question 24: What does the term 'biological monitoring' mean in the context of occupational health on construction sites?

Counting the number of sick days taken by workers
Measuring the concentration of a substance or its metabolite in a worker's blood, urine, or breath to assess actual body uptake (Correct answer)
Checking the biological safety of drinking water
Monitoring for insects and rodents on site

Correct answer: Measuring the concentration of a substance or its metabolite in a worker's blood, urine, or breath to assess actual body uptake

Biological monitoring measures how much of a hazardous substance has actually been absorbed by the body, regardless of the route of exposure. For example, blood lead levels for lead exposure, urine chromium for hexavalent chromium exposure, or urinary metabolites for isocyanate exposure. This complements air monitoring and health surveillance.

Question 25: What is the most common type of occupational ill health in the UK construction industry?

Musculoskeletal disorders (Correct answer)
Respiratory diseases
Skin diseases
Hearing loss

Correct answer: Musculoskeletal disorders

Musculoskeletal disorders (MSDs) are the most common type of occupational ill health in construction, caused by manual handling of heavy materials, repetitive movements, awkward postures, and whole-body vibration. The Manual Handling Operations Regulations 1992 require employers to avoid hazardous manual handling where reasonably practicable.

NEBOSH Health and Safety Management for Construction (UK)

The NEBOSH Construction Certificate (CN1) assesses health and safety knowledge for the construction industry, covering CDM regulations, site hazards, risk management, and hazard control across 13 syllabus elements. It is an open-book, scenario-based assessment requiring candidates to apply their knowledge to realistic construction workplace situations.

Questions

30 min

Time Limit

45%

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

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