Chapter 37 Fire Detection, Protection, and Suppression Systems with verified solutions

A fire department pumper can supplement a sprinkler system water supply through the _____. Select one: A. APV B. Class I standpipe C. FDC D. OS&Y - answer C. FDC A smoke detector should be replaced every _____ years. Select one: A. 4 B. 10 C. 2 D. 6 - answer B. 10 All of the following are standard sprinkler head mounting positions EXCEPT _____. Select one: A. branch B. upright C. sidewall D. pendant - answer A. branch Are heat detectors more, less, or equally prone to false alarms as compared to smoke detectors? Select one: A. It depends on the occupancy type B. Less C. Equally D. More - answer B. Less Closing the_____ valve is the correct method of shutting down the flow of water in a sprinkler system. Select one: A. main check B. alarm C. main water service D. post indicator - answer D. post indicator How are fire alarm systems in most high-rise buildings programmed to alert the occupants? Select one: A. Alarm floor and floor immediately above the alarm floor B. Alarm floor and floors immediately below and above the alarm floor C. Alarm floor only D. Entire building - answer B. Alarm floor and floors immediately below and above the alarm floor How are most smoke detectors restored to non-alarm condition after they have been activated? Select one: A. Recalibrating in a fresh-air environment B. With a special key C. They are self-restoring D. Replacing the detector - answer C. They are self-restoring How can an ionization smoke detector be identified? Select one: A. Low-profile, pancake shape B. Label stating that it contains radioactive material C. Lack of air vents D. Label stating that it contains carcinogenic material - answer B. Label stating that it contains radioactive material How does a bimetallic strip work as a heat detector switch? Select one: A. The strip melts at a certain temperature, interrupting a circuit B. Electrical resistance through the strip increases when the strip is exposed to heat C. The strip creates a magnetic field when heated, activating a switch D. The strip deforms in response to heat, opening or closing a switch - answer D. The strip deforms in response to heat, opening or closing a switch How is a pull-station tamper alarm connected to the fire alarm system? Select one: A. By radio B. Through shared wiring C. Via remote monitoring station D. There is no such connection - answer D. There is no such connection In a preaction sprinkler system, what must happen before water will flow? Select one: A. System air pressure must drop B. The dry-pipe valve must open C. A secondary device must be activated D. The alarm condition must persist for a set time - answer C. A secondary device must be activated In dry-pipe and deluge sprinkler systems, one function of the main valve is to act as a __________. Select one: A. dam B. tamper switch C. pressure regulator D. drain - answer A. dam In which situation is it acceptable for a sprinkler system main control valve not to be locked into the open position? Select one: A. A tamper switch is installed B. The building has an alarm system C. The valve is of the indicating type D. The valve is located in a locked room - answer A. A tamper switch is installed In which sprinkler head mechanism is the cap held in place by a liquid-filled glass capsule? Select one: A. Liquid capsule B. Fusible device C. Frangible bulb D. Chemical pellet - answer C. Frangible bulb n which type of automatic sprinkler system does water flow from all the sprinkler heads when the system is activated? Select one: A. Deluge B. Dry C. Wet D. Preaction - answer A. Deluge In which type of sprinkler system is the piping filled with pressurized air instead of water? Select one: A. Preaction B. Dry C. Wet D. Deluge - answer B. Dry Prevention of nuisance alarms due to pressure variations in a sprinkler system is the function of the __________. Select one: A. pressure compensator B. wet-pipe valve C. surge chamber D. alarm valve - answer D. alarm valve Sprinkler heads are classified by their ________. Select one: A. discharge volume B. operating pressure C. temperature rating D. spray pattern - answer C. temperature rating The combination of working smoke alarms and a residential sprinkler system reduces the chance of a death from a home fire by _____ percent. Select one: A. 56 B. 75 C. 82 D. 66 - answer C. 82 The percentage of blocked light in a beam detector represents the __________ rate. Select one: A. refraction B. obscuration C. diffusion D. diffraction - answer B. obscuration To replace a sprinkler head, what is the next step after the main water supply control valve is closed? Select one: A. Open the drain B. Close the branch line C. Insert a new link or bulb D. Replace the sprinkler head - answer A. Open the drain What are the standard connections on an FDC? Select one: A. One female B. Two females C. Two males D. One male - answer B. Two females What do older heat detectors lack that makes it difficult to track down the cause of an alarm? Select one: A. Wide-spaced combs B. Reset switch C. Indicator light D. Audible alarms - answer C. Indicator light What does activation of a water-motor gong indicate? Select one: A. A fault within the system B. Water flowing in the system C. Low system water pressure D. Tampering of the system - answer B. Water flowing in the system What does the "W" stand for in the acronym WPIV? Select one: A. Wall B. Wet C. Water D. Wye - answer A. Wall What is a concern when a carbon dioxide system is activated? Select one: A. Oxygen-deficient atmosphere B. Electrically conductive residue C. Cold-related injury D. Corrosive residue - answer A. Oxygen-deficient atmosphere What is a major concern with battery-powered smoke alarms? Select one: A. Battery replacement B. False alarm C. Occupants ignoring their activation D. Occupant removal - answer A. Battery replacement What is placed on the system side of a dry-pipe valve to quickly remove the air from the dry-pipe system when a sprinkler head activates? Select one: A. Air drain B. Preaction valve C. Accelerator D. Exhauster - answer D. Exhauster What is the maximum service life of lithium smoke alarm batteries? Select one: A. 5 years B. 12 months C. 18 months D. 10 years - answer D. 10 years What is the most common application for a Halon system? Select one: A. Sensitive electronic equipment B. Metal anodizing and plating C. Processes producing flammable dust D. Commercial kitchens - answer A. Sensitive electronic equipment What is the most common type of fire suppression system? Select one: