Hotel Service Unit 15 Fire Flashcards

What is one of the first steps in organizing an effective fire drill?

B) Notifying the crew and assigning clear roles and responsibilities

At what temperature rise does a thermistor-type rate-of-rise heat detector typically activate?

C) When a set rate of temperature increase, often around 15°F per minute, is detected

Which situation could lead to a fire due to the auto-ignition temperature of a substance?

A) Oil accumulating on a hot engine block

What routine maintenance should be performed on a multiple bottle CO₂ system?

B) Test cylinder pressure and inspect for leaks periodically

What action is required if a portable fire extinguisher has been partially used but is not empty?

B) Recharge and inspect it immediately to ensure it is ready for use

What does ignition point refer to?

D) The lowest temperature where sustained combustion begins with an external ignition source

What is the required timeframe for a CO₂ smothering system to reach full flooding in a machinery space according to regulations?

A) Within 2 minutes

Which of these is a monthly check for hose reels?

B) Confirm the hose reel is accessible and free of obstructions

What kind of circuit component does a thermistor connect to within a heat detector?

B) A control circuit

What is the recommended frequency for the inspection of portable fire extinguishers under UK and international legislation?

A) Monthly visual inspections and annual servicing by a certified professional

What does the term "flash point" refer to?

B) The temperature at which a vapor produces enough fumes to ignite momentarily with an external ignition source

How does the control circuit in a thermistor-based detector respond to a rapid rise in temperature?

C) It signals an alarm

Which of the following is an essential monthly check on portable fire extinguishers?

B) Visually inspect for signs of damage or corrosion

What happens to the pressurized water when the bulb in the sprinkler head breaks?

B) It is released through the sprinkler head to extinguish the fire

What additional safety measure should be taken before activating a CO₂ system?

A) Alert personnel in adjacent spaces

What is the primary sensing component in a thermistor-type rate-of-rise heat detector?

C) Thermistor

What role does the sprinkler head play in initiating the fire alarm system?

C) Water flow through the opened sprinkler head activates a flow switch that triggers the alarm

How quickly should the CO₂ system reach the necessary concentration in a machinery space?

B) Within 2 minutes

Why is a check valve included in the automatic sprinkler system?

A) To prevent water from backflowing into the main supply

What is the primary purpose of fitting an isolation valve on the engine room fire main?

A) To control water flow in case of maintenance or a fire

What is the primary function of the heat-sensitive element in a sprinkler head?

C) To release water when a set temperature is reached

What is the minimum amount of CO₂ required to be discharged into a machinery space in terms of volume?

B) Enough to achieve 40% concentration in the space

Where should CO₂ cylinders be stored in a multiple bottle CO₂ system?

B) In a separate, well-ventilated room adjacent to the machinery space

Which classes of fire should not be extinguished using a dry powder extinguisher?

C) Class K (cooking oils)

What is the purpose of the glass bulb in a pressurized system sprinkler head?

B) To detect heat and break at a specific temperature, allowing water release

Which component in an automatic sprinkler system maintains water pressure and supplies water during a fire emergency?

C) Water supply pump

How should a CO₂ extinguisher be operated in the event of a fire?

D) Pull the pin, aim at the base of the fire, squeeze the handle, and release CO₂ until the fire is out

What is an important check for firefighting equipment before the drill?

A) Ensuring it is fully charged and operational

Why should ventilation systems in the machinery space be closed before activating the CO₂ system?

B) To prevent CO₂ from leaking out and maintain the concentration needed to smother the fire

Which of the following scenarios could lead to a fire from spontaneous combustion?

 

B) Ignition that occurs without an external ignition source, due to internal chemical reactions generating heat

Why is it important to document the fire drill?

A) To keep records for regulatory compliance and future reference

Which component monitors and displays the water pressure in an automatic sprinkler system?

C) Pressure gauge

How is the alarm triggered in an automatic sprinkler system?

B) Through the flow switch detecting water movement in the system

What material is commonly used for the glass bulb in a sprinkler head?

B) Special glass with a heat-sensitive liquid

What is the function of CO₂ discharge nozzles in the system?

B) To concentrate CO₂ in specific areas for rapid suppression

What is the primary purpose of a multiple bottle CO₂ gas system in a machinery space?

B) To rapidly reduce oxygen levels in the event of a fire, smothering flames

Which component of a sprinkler head directs water in a specific spray pattern?

B) The deflector plate

What is the purpose of the alarm bell in an automatic sprinkler system?

B) To alert occupants and fire response teams when the system is activated

How is the engine room fire main isolation valve operated in an emergency?

B) It is manually operated, typically by turning a wheel or lever

What type of valve is most commonly used as an isolation valve in the fire main?

B) Gate valve

Why is communication considered a critical part of fire drills?

B) To ensure clear instructions and updates are given during emergencies

How is the temperature rating of a sprinkler head determined?

C) By the liquid in the bulb that breaks at a specific temperature

Which of these scenarios is an example where flash point plays a critical role?

A) Heating cooking oil in an open pan

Why is it beneficial to conduct fire drills at varying times?

B) To prepare crew members for different scenarios and times when a fire could occur

What yearly inspection is required for fire hose nozzles?

B) Check that the nozzle operates freely and isn’t blocked

What is spontaneous combustion?

B) Ignition that occurs without an external ignition source, due to internal chemical reactions generating heat

Which class of fire is a dry powder extinguisher most suitable for?

B) Class D (flammable metals)

What component of the sprinkler head helps control the spray pattern of the water?

B) The deflector plate

Which of the following is a yearly requirement for portable fire extinguishers?

B) Conduct a full servicing and refill if necessary

What role should a safety officer or observer play in a fire drill?

B) To monitor the drill and provide feedback on performance

What is meant by the auto-ignition temperature of a substance?

A) The lowest temperature at which it ignites without any external flame or spark

Which team should be assigned to operate fire-fighting equipment during a drill?

B) Trained fire response team members

What is the flash point of a substance?

C) The lowest temperature at which it emits vapors that can ignite with an external flame

Why is a time delay mechanism often incorporated in a CO₂ system for machinery spaces?

B) To provide time for personnel to evacuate before discharge

How does the sprinkler head detect a fire and activate?

B) Through heat causing the liquid in the bulb to expand and eventually break

Why does a multiple bottle CO₂ system use several CO₂ cylinders instead of a single large one?

B) To distribute CO₂ evenly across different machinery zones

What is an important check for fire hoses in the monthly inspection routine?

B) Examine the hose for any cracks or wear

Which of the following is a required inspection step for portable fire extinguishers under legislation?

B) Ensuring the pressure gauge is within the operable range

Why are sprinkler heads typically installed in an inverted or upright position?

C) To ensure proper water distribution

What yearly maintenance is required for fixed fire suppression systems?

D) Testing and calibration of detection and release mechanisms

What type of fire does a thermistor-type rate-of-rise heat detector respond to most effectively?

B) Rapidly increasing temperatures, indicating fast-spreading fires

What is an important safety consideration when using a CO₂ extinguisher?

A) Ensure ventilation, as CO₂ displaces oxygen

Why is it essential to have an evacuation route as part of a fire drill?

B) To ensure all personnel are accounted for in a safe location

What monthly check should be performed on fire hydrants?

B) Ensure each hydrant is clearly marked and accessible

How does a thermistor in a heat detector respond to temperature changes?

B) Its electrical resistance varies with temperature

What is the auto-ignition temperature of a substance?

A) The temperature required to ignite without an external ignition source

What type of signage is required near CO₂ activation points?

D) "CO₂ Gas – Risk of Suffocation"

What role does the control valve play in an automatic sprinkler system?

C) It allows water to flow into the system when a fire is detected

What should be checked monthly on the pressure gauge of a fire extinguisher?

A) That the pressure is within the recommended operable range

What should be done with machinery in the space before activating CO₂ discharge?

B) Shut down all operating machinery

Which of the following scenarios could lead to a fire from spontaneous combustion?

A) Leaving oily rags piled in a closed area

What should be done after completing a fire drill?

B) Conduct a debrief to review the drill and identify areas for improvement

What is a critical safety step before discharging the CO₂ system in a machinery space?

B) Ensure all personnel have evacuated the machinery space

How is the multiple bottle CO₂ system typically activated in an emergency?

B) By remote manual pull stations located outside the machinery space

Which material is commonly used to construct the glass bulb in a sprinkler head?

B) Glass with a heat-sensitive liquid inside

What is the importance of simulating different types of fires in drills?

B) To expose crew members to varied emergency situations and responses

What is the primary role of the sprinkler head in an automatic sprinkler system?

B) To detect and release water over a fire area when a set temperature is reached

How does the control circuit in a thermistor-based detector respond to a rapid rise in temperature?

C) It signals an alarm

What is the primary reason for the strict regulation on the flooding time for CO₂ systems?

B) To quickly displace oxygen and smother the fire before it spreads

Which yearly check is typically performed on fire hoses?

B) Hydrostatic pressure test to check hose integrity

Where is the fire main isolation valve typically located in relation to the engine room?

B) Outside the engine room, at a safe distance

What is the first step to take before activating the CO₂ smothering system in a machinery space?

B) Ensure that all personnel have evacuated the machinery space

In what timeframe should CO₂ discharge reach the required concentration in a machinery space to be effective?

B) Within 2 minutes

What annual maintenance is required for smoke detectors in the fire suppression system?

B) Clean and test the detectors for correct operation

What advantage does a thermistor-type rate-of-rise heat detector have over a fixed-temperature detector?

B) It responds faster to rapidly spreading fires due to detecting the rate of temperature increase
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