CITB Managers Occupational Health and Welfare

Question 1

Under the Control of Substances Hazardous to Health Regulations 2002 (COSHH), what is the employer's primary duty regarding hazardous substances?

Accepted Answer

To prevent exposure, or where this is not reasonably practicable, to adequately control it

Answer

COSHH Regulation 7 requires employers to prevent or adequately control exposure to hazardous substances. Prevention is the priority (elimination or substitution), and where that is not reasonably practicable, exposure must be adequately controlled through engineering controls, safe systems of work, and PPE as a last resort.

Question 2

Construction workers are exposed to silica dust from cutting concrete blocks. Under COSHH, what is the Workplace Exposure Limit (WEL) for respirable crystalline silica?

Accepted Answer

0.1 mg/m³ (8-hour TWA)

Answer

The current UK Workplace Exposure Limit for respirable crystalline silica is 0.1 mg/m³ as an 8-hour time-weighted average (TWA). Silicosis is an irreversible lung disease caused by inhaling silica dust, making adequate control essential. Water suppression and on-tool extraction are the primary controls.

Question 3

Under the Control of Noise at Work Regulations 2005, at what daily personal noise exposure level must an employer provide hearing protection to workers who request it?

Accepted Answer

80 dB(A) — the lower exposure action value

Answer

At the lower exposure action value of 80 dB(A), employers must make hearing protection available to employees who request it and provide information and training about the risks. At 85 dB(A) (upper action value), hearing protection becomes mandatory and hearing protection zones must be designated.

Question 4

A construction worker is diagnosed with Hand-Arm Vibration Syndrome (HAVS). Under the Control of Vibration at Work Regulations 2005, what is the daily Exposure Action Value (EAV) for hand-arm vibration?

Accepted Answer

2.5 m/s² A(8)

Answer

The daily Exposure Action Value for hand-arm vibration is 2.5 m/s² A(8). Above this level, employers must introduce measures to reduce exposure. The Exposure Limit Value is 5 m/s² A(8), which must not be exceeded. HAVS causes irreversible damage to blood vessels, nerves and joints in the hands and arms.

Question 5

Under the Construction (Design and Management) Regulations 2015 and the Workplace (Health, Safety and Welfare) Regulations 1992, what welfare facilities must be provided on a construction site?

Accepted Answer

Toilets, washing facilities, drinking water, changing rooms, and rest facilities

Answer

CDM 2015 Schedule 2 requires the provision of sanitary conveniences (toilets), washing facilities (including showers where necessary), drinking water, accommodation for clothing and changing, and rest facilities (including facilities for preparing and eating meals). These must be readily accessible and maintained in a clean condition.

CITB HS&E Managers Practice Test

CITB HS&E Managers Practice Test

CITB Managers Occupational Health and Welfare