S12 definitions Questions With Correct Answers!!

ALARM NOTIFICATION APPLIANCE - Answer-A fire alarm system component, such as a bell, horn, speaker, light, text display or vibration device that issues an audible, tactile, and/or visual alert. ALARM SIGNAL - Answer-A signal indicating an emergency requiring immediate action, such as a signal indicative of fire. ANTIFREEZE SPRINKLER SYSTEM - Answer-A wet pipe sprinkler system employing automatic sprinklers that are attached to a piping system that contains an antifreeze solution and is connected to a water supply. The antifreeze solution is discharged, followed by water, immediately upon operation of sprinklers opened by heat from a fire. AUTOMATIC BALL DRIP - Answer-An automatic drain valve horizontally installed at the low point in the piping between the lower check valve and the Fire Department connection of automatic sprinkler systems. Water pressure from a Fire Department pumper automatically closes this valve. It automatically re-opens when pressure ceases, permitting this piping to drain and thereby preventing freezing. CENTRAL STATION - Answer-A facility that receives alarm signals from a protected premises and retransmits or otherwise reports such alarm signals to the department. COMBINATION STANDPIPE AND SPRINKLER SYSTEM - Answer-A system where the water piping services both 21⁄2 in. (65 mm) outlets for fire department use and outlets for automatic sprinklers. CONCEALED SPRINKLER - Answer-A recessed sprinkler with a cover plate. CONTROL MODE SPECIFIC APPLICATION SPRINKLERS (CMSA) - Answer-Control mode sprinkler systems are designed to control a fire until its original fuel source is depleted or until fire-fighting activities can commence. A fire is controlled by cooling the ceiling-level air temperatures, reducing the fire's rate of heat release and pre-wetting adjacent combustibles.CONTROL VALVE - Answer-A valve controlling flow to water-based fire protection systems. Control valves do not include hose valves, inspector's test valves, drain valves, trim valves for dry pipe, preaction and deluge valves, check valves, or relief valves. OS&Y Valve - Answer-(Outside Stem and Yoke valve) an indicating type of control valve used for fire sprinkler system. Curb Valve - Answer-a non-indicating gate valve equipped with a cast iron extension box flushed with a sidewalk with an operating nut of 1 1⁄4 inch, this valve is operated using a special curb key wrench. This valve controls the municipal water supply serving the fire sprinkler system. CORROSION-RESISTANT SPRINKLER - Answer-A sprinkler fabricated with corrosion resistant materials, or special coatings to be used in an atmosphere that would corrode standard sprinklers. DEFICIENCY - Answer-A condition in which the application of the component is not within its designed limits or specifications. CRITICAL DEFICIENCY - Answer-A deficiency that, if not corrected, can have an effect on the performance of the fire protection system.