Fire Officer p169

What happens when a sprinkler head opens in a wet-pipe system?

• Air is released into the system.

• A foam agent is discharged.

• Water is discharged immediately.

• The system remains inactive.

Why are dry-pipe systems used in certain locations?

• They are cheaper to install.

• They require less maintenance.

• They prevent water from freezing in pipes.

• They are more environmentally friendly.

What is a characteristic of deluge systems?

• They are the most cost-effective system.

• They use compressed air in pipes.

• All sprinklers are open and ready to discharge water.

• They are used in residential buildings.

What is the purpose of a preaction sprinkler system?

• To reduce the risk of water damage due to accidental discharge.

• To increase the speed of water discharge.

• To eliminate the need for a detection system.

• To use less water than other systems.

What type of extinguishing agent might some sprinkler systems discharge?

• Sand

• Carbon dioxide

• Aqueous film-forming foam

• Compressed air

What triggers the water flow in a dry-pipe system?

• A decrease in air pressure

• A manual switch

• A smoke detector

• A temperature sensor

What is a disadvantage of dry-pipe systems compared to wet-pipe systems?

• They are more prone to leaks.

• They require higher maintenance.

• They are less effective in cold climates.

• They are more expensive to install.

In what type of locations are deluge systems most often found?

• Residential homes

• Office buildings

• Unheated storage facilities

• Ordnance plants and aircraft hangers

What is the main advantage of wet-pipe systems?

• They use less water.

• They are suitable for all climates.

• They have a faster reaction time.

• They are less expensive to maintain.

What is a local alarm system?

• A system that alerts the fire department directly.

• A system that automatically calls emergency services.

• A system that sounds an alarm only outside the building.

• A system that uses a central monitoring service.