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For an existing antifreeze system without a backflow prevention device, what size hole is required in the check valve separating the supply and the antifreeze?
For an existing antifreeze system without a backflow prevention device, what size hole is required in the check valve separating the supply and the antifreeze?A . 1/32 in. (0.79 mm)B . 1/16 in. (1.59 mm)C . 1/8 in. (3.17 mm)D . 1/4 in. (6.35 mm)View AnswerAnswer: A Explanation: If sprinklers...
What is the equivalent length of a 45° elbow of 6 in (150 mm) Schedule 10 pipe?
What is the equivalent length of a 45° elbow of 6 in (150 mm) Schedule 10 pipe?A . 8.8 ft (2.7 m)B . 9.8 ft (3.0 m)C . 11.8 ft (3.6 m)D . 12.8 ft (3.9 m)View AnswerAnswer: C Explanation: The equivalent length of a 45° elbow for 6 in...
A paddle-type water flow alarm indicator shall be installed only in
A paddle-type water flow alarm indicator shall be installed only inA . dry systems.B . wet systems.C . deluge systems.D . pre-action systems.View AnswerAnswer: B Explanation:
A sprinkler system employing automatic sprinklers that are attached to a piping system that contains air that might or might not be under pressure, with a supplemental detection system installed in the same areas as the sprinklers, is known as a:
A sprinkler system employing automatic sprinklers that are attached to a piping system that contains air that might or might not be under pressure, with a supplemental detection system installed in the same areas as the sprinklers, is known as a:A . Dry SystemB . Preaction SystemC . Wet SystemD...
What is the maximum floor area that can be protected by a single ordinary hazard sprinkler system?
What is the maximum floor area that can be protected by a single ordinary hazard sprinkler system?A . 25,000 ft2 (2,320 m2)B . 40,000 ft2 (3,720 m2)C . 52,000 ft2 (4,830 m2)D . 70,000 ft2 (6,503 m2)View AnswerAnswer: C Explanation: The maximum floor area on any one floor to be...
What is the hose stream allowance and duration for rolled paper storage protected using ESFR sprinklers?
What is the hose stream allowance and duration for rolled paper storage protected using ESFR sprinklers?A . 250 gpm (950 L/min) for 60 minutesB . 250 gpm (950 L/min) for 180 minutesC . 500 gpm (1900 L/min) for 120 minutesD . 500 gpm (1900 L/min) for 180 minutesView AnswerAnswer: C...
A device for use in applications requiring special water discharge patterns, directional spray, or other unusual discharge characteristics, is known as a
A device for use in applications requiring special water discharge patterns, directional spray, or other unusual discharge characteristics, is known as aA . nozzie.B . water mist nozzle.C . special sprinkler.D . CMSA sprinkler.View AnswerAnswer: C Explanation: A special sprinkler is a device for use in applications requiring special water...
Which of the following hazards can be protected with this design criteria?
Based on an existing hydraulic placard located at the sprinkler system riser, the design of the sprinkler system is based on a density of 0.495 gpm/ft2 (20.1 mm/min) over an area of 2000 ft2 (186 m2). Sprinklers in cabinet are 286 degrees. Which of the following hazards can be protected...
What is the minimum number of spare sprinklers to be provided?
A sprinkler system has been installed with 100 sprinklers. What is the minimum number of spare sprinklers to be provided?A . 3B . 6C . 9D . 12View AnswerAnswer: B Explanation: According to NFPA 13, a supply of at least six spare sprinklers shall be maintained on the premises for...
Which of the following is a mandatory referenced publication in NFPA 13?
Which of the following is a mandatory referenced publication in NFPA 13?A . NFPA 10B . NFPA 12C . NFPA 20D . NFPA 291View AnswerAnswer: C Explanation: NFPA 20, which covers the installation of stationary pumps for fire protection, is a mandatory reference in NFPA 13. This standard is essential...
