ECS - Electrotechnical Certification Scheme Fire Safety and Emergencies Questions and Answers — Questions and Answers
Question 1: An electrician discovers a fire in a consumer unit they are working on. Which type of fire extinguisher is most appropriate to use in this situation?
- Water (Red)
- Foam (Cream band)
- CO2 (Black band) (Correct answer)
- Wet Chemical (Yellow band)
Correct answer: CO2 (Black band)
CO2 extinguishers are the correct choice for fires involving live electrical equipment. They work by displacing oxygen, suffocating the fire without leaving a residue that could damage the electrical components or conduct electricity, which would pose a shock hazard to the user. Water and foam are conductive and should never be used on live electrical fires. Wet chemical extinguishers are for Class F (cooking oil) fires.
Question 2: Upon hearing a continuous fire alarm on a construction site, what is the first and most important action an individual should take?
- Finish the task quickly before leaving.
- Find a fire extinguisher and try to fight the fire.
- Leave the building immediately by the nearest safe exit. (Correct answer)
- Call the site manager to ask for instructions.
Correct answer: Leave the building immediately by the nearest safe exit.
Personal safety is the highest priority during a fire alarm. The correct procedure is to evacuate the building immediately via the nearest and safest escape route and proceed to the designated assembly point. Attempting to fight the fire is only for trained personnel and only if it is safe to do so. Delaying evacuation for any reason increases personal risk.
Question 3: Which of the following is NOT a primary responsibility of a designated Fire Marshal or Warden on a worksite?
- Conducting a roll call at the assembly point.
- Carrying out the electrical isolation of the entire building. (Correct answer)
- Checking that fire exits and escape routes are clear.
- Directing personnel to the designated assembly point during an evacuation.
Correct answer: Carrying out the electrical isolation of the entire building.
While a Fire Marshal has many responsibilities related to evacuation and safety checks, performing the complete electrical isolation of a building is a specialist task for a competent person (like a qualified electrician) and is not a primary duty of a Fire Marshal. Their role focuses on the safe evacuation of people, checking that routes are clear, and accounting for everyone at the assembly point.
Question 4: When selecting a location for a fire assembly point, which factor is most critical to consider?
- It must be in a location with a good mobile phone signal.
- It must be close to the main building entrance for easy return.
- It must be in a safe location that does not obstruct emergency services. (Correct answer)
- It must be a covered area to protect from bad weather.
Correct answer: It must be in a safe location that does not obstruct emergency services.
The primary purpose of an assembly point is to provide a place of safety and to allow for a roll call. It is crucial that the location does not interfere with the access of fire engines and other emergency vehicles. While other factors might be convenient, preventing obstruction to emergency services is a critical safety requirement.
Question 5: An electrician working in a ceiling void accidentally starts a small fire involving wooden joists and cabling insulation. The power has been safely isolated. Which fire extinguisher would be suitable for this Class A and electrical risk fire?
- CO2 (Black band)
- Water (Red)
- Dry Powder (Blue band) (Correct answer)
- Foam (Cream band)
Correct answer: Dry Powder (Blue band)
Dry Powder (ABC) extinguishers are effective on Class A (solid combustibles like wood), Class B (flammable liquids), and Class C (flammable gases) fires. They can also be used on fires involving electrical equipment (up to 1000V). Since the fire involves both wood (Class A) and is near electrical wiring, a Dry Powder extinguisher is a versatile and appropriate choice, especially after isolation. CO2 would be less effective on the smouldering wood.
Question 6: According to the BS EN 3 standard for portable fire extinguishers in the UK, what is the primary body colour for all modern extinguishers?
- Blue
- Yellow
- Green
- Red (Correct answer)
Correct answer: Red
The BS EN 3 standard, which replaced the old BS 5423, mandates that at least 95% of the body of a fire extinguisher must be coloured 'Signal Red'. A small coloured band is then used to identify the type of extinguishing agent inside (e.g., black for CO2, cream for Foam).
ECS - Electrotechnical Certification Scheme Fire Safety and Emergencies Questions and Answers
An electrician discovers a fire in a consumer unit they are working on.
Which type of fire extinguisher is most appropriate to use in this situation?