Mixed Deck — All NEBOSH Topics Flashcards

According to HSG65, what are the four Cs of the 'Organising' element?

Answer: Control, cooperation, communication, and competence

The four Cs — Control, Cooperation, Communication, and Competence — represent the key elements needed to organise people effectively for health and safety management.

What does PUWER 1998 Regulation 5 require regarding the maintenance of work equipment?

Answer: Work equipment must be maintained in an efficient state, in efficient working order, and in good repair

Regulation 5 requires that work equipment is maintained in an efficient state, in efficient working order, and in good repair. Where a maintenance log is required, it must be kept up to date. 'Efficient' here relates to health and safety efficiency, not productivity.

Under PUWER 1998, what is the primary duty placed on employers regarding the provision of work equipment?

Answer: Equipment must be suitable for its intended use and conditions

Regulation 4 of PUWER 1998 requires employers to ensure work equipment is suitable by design, construction or adaptation for the actual work it will be used for, considering the working conditions and health and safety risks.

When should a hot work permit be issued?

Answer: Before any work producing flames, sparks, or heat sufficient to ignite flammable materials — welding, cutting, grinding, brazing, in any area where flammable materials may be present

Hot work permits are required whenever flames, sparks, or heat-generating tools are used in areas where flammable/combustible materials are present or may accumulate. The permit confirms: fire watch assigned, flammable materials removed/protected, fire suppression available, area checked post-work. Hot work is a major cause of construction fires in the Gulf.

Under the Health and Safety (First-Aid) Regulations 1981, what is the employer's primary duty?

Answer: To provide adequate and appropriate first-aid equipment, facilities, and personnel to enable first aid to be rendered to employees who are injured or become ill at work

The First-Aid Regulations require employers to provide adequate and appropriate equipment, facilities, and personnel so that employees can receive immediate attention if injured or taken ill at work. What is 'adequate and appropriate' depends on the nature of the work, workforce size, and site hazards.

What is audiometry and why is it used in occupational noise health surveillance?

Answer: A hearing test that measures the ability to hear pure tones at specific frequencies, used to detect early noise-induced hearing damage before it becomes disabling

Audiometry is a hearing test where the subject listens to pure tones at various frequencies through headphones in a quiet environment. The results are plotted on an audiogram showing hearing thresholds at each frequency. In occupational health surveillance, serial audiometry compares results over time to detect the characteristic 4 kHz dip of NIHL at an early stage when intervention (improved controls) can prevent further deterioration.

Which of the following is NOT a welfare requirement under CDM 2015 Schedule 2 for construction sites?

Answer: A staff gymnasium and recreation room

CDM Schedule 2 requires sanitary conveniences, washing facilities, drinking water, changing and rest facilities including means of heating food and boiling water, and facilities for drying clothing. A gymnasium is not a welfare requirement under any health and safety regulation.

What are the main hazards associated with ionising radiation in the workplace?

Answer: Cell damage and DNA mutation leading to cancer (stochastic effects), radiation burns, radiation sickness, cataracts, and hereditary effects (deterministic and stochastic effects)

Ionising radiation causes two types of health effects: deterministic effects (occur above a threshold dose — radiation burns, sickness, cataracts, organ damage) and stochastic effects (probability increases with dose, no threshold — cancer and hereditary genetic effects). The Ionising Radiations Regulations 2017 control workplace exposure through dose limits, ALARP principle, designated areas, and personal dosimetry.

A wet chemical fire extinguisher is identified by which colour band and is primarily designed for which fire class?

Answer: Yellow band, Class F fires (cooking oils and fats)

A wet chemical extinguisher has a yellow colour band and is specifically designed for Class F fires involving cooking oils and fats. It works by reacting with the hot oil to form a soapy film (saponification) that seals the surface and cools the oil below its auto-ignition temperature.

What is the risk assessment implication of 'reasonably foreseeable' harm?

Answer: Employers must control risks from harm that a reasonable person would foresee as likely — they are not required to anticipate every conceivable but highly unlikely event

'Reasonably foreseeable' is the legal test for duty of care. Employers must assess and control hazards where harm could reasonably be anticipated, given the nature of the work and available information. Courts assess this against what a competent employer in the same field should have known and done.

What are H-statements and P-statements on a GHS chemical label?

Answer: H-statements are Hazard statements describing the nature and degree of hazard; P-statements are Precautionary statements advising on prevention, response, storage, and disposal

Hazard statements (H-statements) are standardised phrases describing the nature and severity of a hazard (e.g., H301 'Toxic if swallowed'). Precautionary statements (P-statements) provide standardised advice on prevention (P2xx), response (P3xx), storage (P4xx), and disposal (P5xx) — e.g., P280 'Wear protective gloves.' Each is identified by a unique code for international consistency.

A worker develops occupational asthma after years of exposure to isocyanates. What type of hazard caused this?

Answer: Chemical hazard — respiratory sensitizer

Isocyanates are powerful respiratory sensitizers — chemical hazards that cause occupational asthma in susceptible individuals after sensitization. Once sensitized, even trace exposures cause severe asthmatic reactions. This is one of the most common causes of occupational lung disease in the Gulf region's manufacturing and construction sectors.

Which of the following is an example of a proactive (leading) indicator of health and safety performance?

Answer: Number of safety training sessions completed

Leading indicators measure proactive safety activities (training, inspections, audits) before incidents occur. Lagging indicators (accident rates, claims, lost time) measure outcomes after events have happened.

What type of injury is De Quervain's tenosynovitis classified as?

Answer: An upper limb disorder from repetitive wrist movements

De Quervain's tenosynovitis is an upper limb disorder (ULD) affecting the tendons on the thumb side of the wrist. It is caused by repetitive or forceful wrist movements and is one of several work-related upper limb disorders recognised in occupational health.

What is the difference between a Group 2 and a Group 3 biological agent?

Answer: Group 2 can cause human disease but effective treatment is usually available and community spread is unlikely; Group 3 can cause severe disease, may spread to the community, but effective treatment or prophylaxis usually exists

Group 2 agents can cause human disease and may be a hazard to workers, but are unlikely to spread to the community, and effective prophylaxis or treatment is usually available (e.g., Clostridium tetani). Group 3 agents can cause severe human disease, may present a serious hazard, and may spread to the community, but effective prophylaxis or treatment usually exists (e.g., Mycobacterium tuberculosis, HIV).

What is the purpose of recording near-misses and unsafe conditions alongside accidents in the safety management system?

Answer: Near-misses and unsafe conditions reveal system failures before they cause injury — analyzing them enables prevention, not just reaction

Heinrich's triangle shows many near-misses occur for every serious injury. Organizations that capture and analyze near-miss and unsafe condition reports gain early warning of system failures, enabling proactive intervention. A culture where workers feel safe to report near-misses without blame is associated with significantly lower accident rates.

Which of the following working at height tasks would be MOST suitable for a podium step rather than a traditional stepladder?

Answer: Performing a brief, stable overhead task such as fitting a ceiling tile

A podium step provides a stable, guarded platform ideal for brief overhead tasks at low height, offering greater safety than a stepladder for tasks requiring two-handed work.

What is the employer's obligation regarding workplace temperature when it cannot be maintained at a comfortable level due to the work process?

Answer: Steps must be taken to achieve a temperature as close to comfortable as possible, and localised measures such as fans, screens or PPE should be provided

Where processes inherently generate heat or cold (foundries, cold stores), the employer cannot always achieve comfortable ambient temperatures. However, they must take all reasonable steps to achieve a temperature as close to comfortable as practicable, using measures such as shielding from heat sources, providing local cooling/heating, rest breaks, and suitable PPE.

An adjustable guard differs from a self-adjusting guard in that an adjustable guard requires what?

Answer: Manual adjustment by the operator to suit the workpiece size

An adjustable guard incorporates an adjustable element that the operator must manually set to accommodate different workpiece sizes. Unlike self-adjusting guards that move automatically, the operator positions the guard before starting work. This introduces a human factor risk if the guard is not properly adjusted.

What is the primary purpose of accident investigation in health and safety management?

Answer: To identify the immediate and underlying causes of the accident in order to prevent recurrence

The primary purpose of accident investigation is to identify what happened, why it happened (immediate and root causes), and what actions are needed to prevent a similar event from occurring again. It is not about allocating blame, which can actually hinder effective investigation by discouraging honest reporting.