NEBOSH CC Dust & Noise in Construction

Question 1

Which disease is caused by the inhalation of respirable crystalline silica (RCS) dust on construction sites?

Accepted Answer

Silicosis

Answer

Asbestosis

Answer

Mesothelioma

Answer

Pneumoconiosis (coal dust)

Question 2

Which construction activities commonly generate respirable crystalline silica dust?

Accepted Answer

Cutting, grinding, drilling and chasing concrete, brick, stone and mortar

Answer

Painting and decorating

Answer

Electrical installation

Answer

Plumbing and pipework

Question 3

What is the Workplace Exposure Limit (WEL) for respirable crystalline silica dust under EH40?

Accepted Answer

0.1 mg/m³ (8-hour TWA)

Answer

1.0 mg/m³ (8-hour TWA)

Answer

0.5 mg/m³ (8-hour TWA)

Answer

0.01 mg/m³ (8-hour TWA)

Question 4

What is the most effective engineering control for reducing dust during dry cutting operations on a construction site?

Accepted Answer

On-tool dust extraction combined with water suppression (wet cutting)

Answer

Wearing a dust mask only

Answer

Working quickly to minimise exposure duration

Answer

Performing all work outdoors

Question 5

Which regulations govern occupational exposure to hazardous substances including dust on construction sites?

Accepted Answer

Control of Substances Hazardous to Health Regulations 2002 (COSHH)

Answer

Workplace (Health, Safety and Welfare) Regulations 1992

Answer

Control of Dust at Work Regulations

Answer

Personal Protective Equipment at Work Regulations 1992

Question 6

What type of respiratory protective equipment (RPE) is required when working with high-hazard dusts such as RCS?

Accepted Answer

Minimum FFP3 disposable filtering face piece or powered air purifying respirator (PAPR)

Answer

FFP1 dust mask only

Answer

A standard surgical mask

Answer

Any face covering that covers the nose and mouth