ECS - Electrotechnical Certification Scheme Work at Height Safety Questions and Answers — Questions and Answers
Question 1: According to the Work at Height Regulations 2005, what is the first and most important control measure to consider before starting any task that might involve working at height?
- Ensuring all workers have been issued with personal fall arrest systems.
- Conducting a pre-use inspection of the access equipment, such as a ladder or MEWP.
- Avoiding the need to work at height altogether by, for example, assembling components at ground level. (Correct answer)
- Placing warning signs and barriers around the area where work at height will take place.
Correct answer: Avoiding the need to work at height altogether by, for example, assembling components at ground level.
The Work at Height Regulations 2005 establish a hierarchy of controls. The primary and most effective measure is to eliminate the risk by avoiding work at height wherever it is reasonably practicable to do so.
Question 2: An electrician is tasked with installing a new lighting fixture on a high ceiling inside a commercial building with a flat, level floor. Which type of access equipment would generally be considered the safest and most appropriate choice for this scenario?
- A leaning ladder placed against a nearby wall.
- A mobile scaffold tower.
- A scissor lift (a type of Mobile Elevating Work Platform - MEWP). (Correct answer)
- A stepladder positioned directly underneath the work area.
Correct answer: A scissor lift (a type of Mobile Elevating Work Platform - MEWP).
A scissor lift (Group A MEWP) provides a stable, secure working platform with guardrails, which is much safer than a ladder for tasks of this nature. It allows the electrician to have tools and materials on the platform and work with both hands free, significantly reducing the risk of a fall.
Question 3: Which of the following is a critical safety requirement when using a leaning ladder for electrical work?
- The ladder must be made of a conductive material like aluminium for strength.
- The user must always maintain three points of contact with the ladder while climbing or descending. (Correct answer)
- It is acceptable to work from the top three rungs if the ladder is secured at the top.
- The base of the ladder should be placed one foot away from the wall for every five feet of height.
Correct answer: The user must always maintain three points of contact with the ladder while climbing or descending.
To ensure stability and reduce the risk of slipping and falling, it is a fundamental safety rule to always maintain three points of contact with the ladder (e.g., two feet and one hand, or one foot and two hands). For electrical work, non-conductive ladders (e.g., fibreglass) must be used. The '4-to-1' rule applies to ladder angle, not 5-to-1, and you should never work from the top three rungs.
Question 4: A personal fall arrest system, including a harness and lanyard, has been issued to a worker. According to UK regulations and best practice, what inspection regime must be followed?
- A formal inspection by a competent person is only required if the equipment is involved in a fall.
- The worker should perform a quick visual check annually.
- A pre-use check by the user before each use, and a detailed inspection by a competent person at least every 6-12 months. (Correct answer)
- The equipment only needs to be inspected by the manufacturer every two years.
Correct answer: A pre-use check by the user before each use, and a detailed inspection by a competent person at least every 6-12 months.
Fall arrest equipment requires a two-level inspection process. The user must perform a pre-use check every time before using it to spot obvious defects. Additionally, a competent person must conduct and record a detailed, formal inspection at regular intervals, typically every 6 to 12 months, as specified by regulations and manufacturer guidance.
Question 5: When planning work at height, the 'hierarchy of control' must be applied. Which of the following correctly orders the measures from most preferable to least preferable?
- 1. Use PPE, 2. Use collective protection (e.g., guardrails), 3. Avoid work at height.
- 1. Avoid work at height, 2. Use collective protection (e.g., guardrails), 3. Use personal protection (e.g., harness). (Correct answer)
- 1. Use personal protection (e.g., harness), 2. Use collective protection (e.g., guardrails), 3. Avoid work at height.
- 1. Use collective protection (e.g., guardrails), 2. Avoid work at height, 3. Use personal protection (e.g., harness).
Correct answer: 1. Avoid work at height, 2. Use collective protection (e.g., guardrails), 3. Use personal protection (e.g., harness).
The established hierarchy of control for work at height prioritises eliminating the risk first (Avoid). If that's not possible, the next step is to prevent a fall using collective equipment (e.g., scaffolding, guardrails). The final resort is to minimise the distance and consequences of a fall using personal protective equipment (PPE).
Question 6: An electrician needs to work near exposed overhead power lines. Which type of ladder material is mandatory for this task?
- Aluminium, because it is lightweight and strong.
- Wood, as long as it is dry.
- Steel, for maximum durability.
- Fibreglass, because it is non-conductive. (Correct answer)
Correct answer: Fibreglass, because it is non-conductive.
When working in proximity to live electrical conductors, it is essential to use equipment that does not conduct electricity to prevent electrocution. Fibreglass is a non-conductive material and is the required choice for ladders in this situation. Aluminium and steel are highly conductive and extremely dangerous, while wood can become conductive if wet.
ECS - Electrotechnical Certification Scheme Work at Height Safety Questions and Answers
According to the Work at Height Regulations 2005, what is the first and most important control measure to consider before starting any task that might involve working at height?