CSCS - Construction Skills Certification Scheme High-Risk Activities Questions and Answers — Questions and Answers
Question 1: A 'hot work' permit is required before starting a task involving grinding on a construction site. Which of the following is a critical control measure that MUST be in place for the duration of the work and for a set period afterwards?
- Ensuring the grinder has a valid PAT test certificate.
- A designated and competent fire watch. (Correct answer)
- Having a second worker available to assist with the task.
- Cordoning off the area with warning tape.
Correct answer: A designated and competent fire watch.
A hot work permit system requires a designated, competent fire watch to monitor the work area for signs of fire during the activity and for a specified period (often 30-60 minutes) after completion to spot smouldering embers. While other options are good safety practices, the dedicated fire watch is a specific and critical requirement for hot work.
Question 2: An operative is tasked with entering a deep, unventilated drainage pit to carry out a repair. According to the Confined Spaces Regulations 1997, what is the most important requirement before any entry is permitted?
- The operative must have a mobile phone to call for help.
- At least two workers must be present at the entry point.
- Suitable and sufficient emergency rescue arrangements must be in place. (Correct answer)
- The work must be completed within a 30-minute time limit.
Correct answer: Suitable and sufficient emergency rescue arrangements must be in place.
The Confined Spaces Regulations 1997 explicitly state that no person shall enter a confined space unless suitable and sufficient arrangements for the rescue of persons in the event of an emergency have been prepared and are ready to be implemented. This is a fundamental legal requirement due to the high-risk nature of such environments.
Question 3: A crane is being used to lift a large structural beam into place. According to the Lifting Operations and Lifting Equipment Regulations 1998 (LOLER), which of the following is essential for ensuring the safety of the operation?
- The crane operator must have more than five years of experience.
- The lifting operation must be properly planned by a competent person. (Correct answer)
- The weather forecast must show no chance of rain.
- All other work on the site must stop during the lift.
Correct answer: The lifting operation must be properly planned by a competent person.
LOLER requires that every lifting operation is properly planned by a competent person, appropriately supervised, and carried out in a safe manner. This planning is a critical step to identify risks and establish a safe system of work, regardless of the operator's experience or the weather, although those are factors the plan would consider.
Question 4: When planning a demolition project, which of the following is a key requirement under the Construction (Design and Management) Regulations 2015 (CDM)?
- Recycling at least 50% of the material from the demolished structure.
- Ensuring the demolition method is the fastest one available.
- Notifying the local authority at least six weeks before starting work. (Correct answer)
- Using explosives for all structures over three storeys high.
Correct answer: Notifying the local authority at least six weeks before starting work.
Under UK law, you must give notice to the local authority, typically the building control department, at least 6 weeks before you intend to start demolition work. This allows them to consider the proposed methods and any potential impact on the public or adjacent structures.
Question 5: A worker is about to start a job in an excavation that is 2.5 metres deep. A competent person has inspected the excavation at the start of the shift. What is a critical safety measure to prevent the sides from collapsing?
- Placing spoil heaps and heavy equipment as close to the edge as possible.
- Ensuring the worker has a rope to pull themselves out.
- Using support systems like trench boxes, shoring, or battering the sides to a safe angle. (Correct answer)
- Working quickly to minimize time spent in the excavation.
Correct answer: Using support systems like trench boxes, shoring, or battering the sides to a safe angle.
HSE guidance is clear that excavations are high-risk and must be made safe. This is achieved by preventing collapse through methods such as battering the sides to a safe angle of repose or, more commonly, installing temporary support systems like trench sheets, props, or prefabricated trench boxes. Placing spoil and plant near the edge increases the load and risk of collapse.
Question 6: Which of the following roles is crucial for coordinating and ensuring the safety of temporary structures like scaffolding, falsework, and propping on a construction site, as recommended by BS 5975?
- The Health and Safety Officer.
- The Site Manager.
- The Temporary Works Coordinator (TWC). (Correct answer)
- The Principal Designer.
Correct answer: The Temporary Works Coordinator (TWC).
BS 5975 (the code of practice for temporary works procedures) and HSE guidance recommend the appointment of a competent Temporary Works Coordinator (TWC). This person is responsible for ensuring that all temporary works are properly designed, checked, installed, and maintained safely on site.
CSCS - Construction Skills Certification Scheme High-Risk Activities Questions and Answers
A 'hot work' permit is required before starting a task involving grinding on a construction site.
Which of the following is a critical control measure that MUST be in place for the duration of the work and for a set period afterwards?