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100+ Free NEBOSH National Diploma Practice Questions

NEBOSH Level 6 National Diploma for Occupational Health and Safety Management Professionals practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: NEBOSH National Diploma Exam

RQF Level 6, 43 credits

Qualification Level

NEBOSH / Ofqual

3 units (DN1, DN2, DN3)

Assessment Structure

NEBOSH 2023 Specification

50% per unit

Provisional Pass Mark

NEBOSH Diploma Learner Guide

226+ Distinction

Top Grade Boundary

NEBOSH Grading

80 / 85 dB(A)

Noise Action Values

Control of Noise at Work Regulations 2005

2.5 / 5.0 m/s2

Hand-Arm Vibration EAV/ELV

Control of Vibration at Work Regulations 2005

5-year enrolment

Completion Window

NEBOSH

The NEBOSH National Diploma (Level 6, 2023 spec) is the UK's leading professional OHS diploma, taken by people building a career as health and safety practitioners. It is assessed not by multiple choice but through three units: DN1, a workplace-based assignment (simulation, reflective and research tasks, approx 40 hours, 300 marks); DN2, a scenario case study on workplace health issues (approx 20 hours, 175 marks); and DN3, a case study on workplace safety issues (175 marks). DN1 covers UK H&S law and HSWA 1974 duties, enforcement, leadership and safety culture, competence, human factors, risk management strategy, loss causation, monitoring/auditing, change and contractor management. DN2 covers COSHH and Workplace Exposure Limits, toxicology, asbestos (0.1 f/cm3), noise (80/85/87 dB(A)), vibration (2.5/5.0 and 0.5/1.15 m/s2), radiation, musculoskeletal and stress. DN3 covers fire and DSEAR, work equipment/PUWER, electricity, work at height, construction (CDM 2015) and transport. The provisional unit pass mark is 50%; combined marks give Pass (150-195), Credit (196-225) or Distinction (226+). It is the recognised academic route toward IOSH Certified membership (formerly GradIOSH) and Chartered status.

Sample NEBOSH National Diploma Practice Questions

Try these sample questions to test your NEBOSH National Diploma exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under the Health and Safety at Work etc. Act 1974, which section places the primary general duty on an employer to ensure, so far as is reasonably practicable, the health, safety and welfare at work of all of its own employees?
A.Section 2
B.Section 3
C.Section 4
D.Section 7
Explanation: Section 2(1) HSWA 1974 imposes the general duty on every employer to ensure, so far as is reasonably practicable, the health, safety and welfare at work of all employees, including safe plant, systems, information, training and supervision.
2A self-employed window cleaner is injured by falling masonry while working on the outside of a factory. The factory occupier had failed to maintain the building. Which provision of the Health and Safety at Work etc. Act 1974 is most directly relevant to the occupier's duty towards the window cleaner?
A.Section 2
B.Section 3
C.Section 6
D.Section 8
Explanation: Section 3 HSWA 1974 requires employers (and the self-employed) to conduct their undertaking so as to ensure, so far as is reasonably practicable, that persons not in their employment who may be affected are not exposed to risks to their health or safety.
3Which of the following best describes an employee's statutory duties under Section 7 of the Health and Safety at Work etc. Act 1974?
A.To carry out suitable and sufficient risk assessments of their work
B.To provide adequate welfare facilities for colleagues
C.To take reasonable care for their own and others' safety and to co-operate with the employer
D.To indemnify the employer against any civil claims arising from their work
Explanation: Section 7 HSWA 1974 requires every employee, while at work, to take reasonable care for the health and safety of themselves and of others affected by their acts or omissions, and to co-operate with the employer so far as is necessary to enable duties to be performed.
4During an inspection an HSE inspector observes an unguarded power press in use that presents a risk of serious personal injury. The inspector wants the activity to stop immediately. Which enforcement action is most appropriate?
A.A Crown Notice
B.An improvement notice with a 21-day compliance period
C.A simple caution
D.A prohibition notice
Explanation: A prohibition notice (Section 22 HSWA 1974) is used where an activity involves, or will involve, a risk of serious personal injury; it can take immediate effect and requires the activity to stop until the contravention is remedied.
5An employer wishes to appeal against an improvement notice served by an HSE inspector. Within what period must the appeal be lodged with an employment tribunal, and what is the effect on the notice?
A.Within 21 days; lodging the appeal suspends the notice until the tribunal hears it
B.Within 21 days; the notice continues to have effect despite the appeal
C.Within 28 days; the notice is automatically withdrawn
D.Within 40 days; the notice is suspended only if the tribunal so directs
Explanation: An appeal against an improvement notice must be made to an employment tribunal within 21 days; for an improvement notice the act of lodging the appeal suspends the notice until the appeal is disposed of or withdrawn.
6The phrase 'so far as is reasonably practicable' was interpreted in Edwards v National Coal Board (1949). Which statement best reflects that interpretation?
A.The duty is absolute and cost is never a relevant consideration
B.A computation must be made weighing the quantum of risk against the sacrifice (cost, time, trouble) needed to avert it, with a gross disproportion test
C.The employer need only do whatever is physically possible regardless of cost
D.Risk only needs to be controlled where it is more likely than not to cause death
Explanation: Edwards v NCB established that 'reasonably practicable' requires a computation in which the quantum of risk is placed on one scale and the sacrifice in money, time or trouble on the other; the measures are not reasonably practicable only where the cost is grossly disproportionate to the risk.
7Which regulation of the Management of Health and Safety at Work Regulations 1999 imposes the explicit duty on an employer to make a 'suitable and sufficient' assessment of risks to employees and others?
A.Regulation 1
B.Regulation 5
C.Regulation 3
D.Regulation 7
Explanation: Regulation 3 of the MHSWR 1999 requires every employer to make a suitable and sufficient assessment of the risks to the health and safety of employees and of persons not in their employment arising from the conduct of the undertaking.
8What is the legal status of an Approved Code of Practice (ACoP) approved by the HSE in a criminal prosecution?
A.It has the same binding force as an Act of Parliament and breach is automatically an offence
B.It is purely advisory and cannot be referred to in court at all
C.It is for information only and is overridden by HSE guidance
D.If a defendant is proved not to have followed the relevant ACoP, they must show they complied in some other equally effective way or a court may find against them
Explanation: An ACoP has special legal status: failure to follow it is not in itself an offence, but if it is proved that a defendant did not follow the relevant ACoP provisions, a court may find them at fault unless they can show they satisfied the law in another, equally effective way.
9In a criminal prosecution brought under the Health and Safety at Work etc. Act 1974, what is the standard of proof that the prosecution must meet?
A.On the balance of probabilities
B.Beyond reasonable doubt
C.Clear and convincing evidence
D.Prima facie evidence only
Explanation: Criminal cases, including health and safety prosecutions, require the prosecution to prove the case 'beyond reasonable doubt'. Civil claims (e.g. negligence) use the lower 'balance of probabilities' standard.
10To succeed in a civil claim of negligence following a workplace injury, the injured worker (claimant) must generally establish three elements. Which set correctly lists them?
A.A duty of care was owed, that duty was breached, and the breach caused reasonably foreseeable harm
B.A criminal conviction, an enforcement notice, and a financial loss
C.Intent to harm, a written contract, and a witness statement
D.A breach of statutory duty, a guilty plea, and a fixed penalty
Explanation: Common-law negligence requires the claimant to prove that the defendant owed a duty of care, that the duty was breached, and that the breach caused harm that was reasonably foreseeable (the 'neighbour principle' from Donoghue v Stevenson).

About the NEBOSH National Diploma Practice Questions

Verified exam format metadata for NEBOSH Level 6 National Diploma for Occupational Health and Safety Management Professionals is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.