1 Exam Prep. NFPA 90 B Questions

Transcription

1 1 xam Prep NFP 90 Questions 1. onnectors are more restricted and are generally limited to? 14 feet 14 inches 2 feet 1 foot 2. Where a hand-fired, solid fuel-burning furnace is equipped with a fan to circulate the air, it shall be equipped with fan controls as required for? Smoker-fired furnaces Stoker-fired furnaces Hand-fired fuel burning furnaces are no longer allowed Other fuel burning furnaces 3. central warm air heating system through which air is circulated by gravity is? System Forced ir System entral Warm ir Heating System Return System 4. central warm air heating system that is equipped with a fan or blower that provides th. primary means for circulation of air is called a system. lowing air 5. n unlisted automatically fired system with a temperature limit control that cannot be set higher than 250 degrees Fahrenheit burns gas fuel and is installed in a room that is large in comparison with the size of the appliance. For safety reasons, this system must have a minimum clearance of inches in front xam Prep NFP 90 1

2 6. central warm air heating system through which air is circulated by gravity is called a system. Self-perpetuating air 7. central warm air heating system that is equipped with a fan or blower providing the primary means for circulation of air is called a system. lowing air 8. entral warm air heating systems where air is circulated by gravity is a system. Self-perpetuating air 9. n unlisted automatically fired system with a temperature limit control that cannot be set higher than 250 degrees Fahrenheit burns gas fuel and is installed in a room that is large in comparison with the size of the appliance. For safety reasons, this system must have a minimum clearance of inches in front The official NFP definition of a(n) system is a central warm air heating system through which air is circulated by gravity. nergy efficient 11. forced air -system burning gas fuel with a 250 degree Fahrenheit -temperature limit control must have a minimum frontal clearance from all combustible material of inches, when installed in a room considered large as compared to the size of the appliance xam Prep NFP 90 2

3 12. The official NFP definition of "accessible" is that a system? Has a way of approach. Has a way of approach and can be readily repaired or removed from a Is not permanently closed in by the structure or finish of a building. Is capable of being removed or exposed without damaging the building structure or finish. The system is not permanently closed in by the structure or finish of a building. 13. The official NFP definition of material is a material capable of undergoing combustion. ombustible angerous xplosive Hazardous 14. Temperature limit controls shall be located no more than? 2 feet upstream from the heat exchanger 2 feet downstream from the heat exchanger 3 feet upstream from the heat exchanger 3 feet downstream from the heat exchanger 15. flammable or combustible heat transfer fluid from a solar energy system shall not be used? In hot weather climates In cold weather climates In a heat exchanger located outdoors In a heat exchanger located in a duct system 16. Solar systems shall be controlled so that the temperature in the supply system shall not exceed? 250 degrees entigrade 250 degrees Fahrenheit 212 degrees Fahrenheit 121 degrees Fahrenheit 17. central warm air system through which air is circulated by gravity is a/an system. Flow-through Metered 18. For exposed rectangular ducts over 14 inches the minimum galvanized sheet metal thickness is? 26 gage 019 inches.024 inches.013 inches 1 xam Prep NFP 90 3

4 19. ccording to NFP, a heating system consisting of a heat exchanger with an outer casing or jacket, or an electric heating unit, connected to a supply system and a return system is defined as a/an. Industrial furnace uct heater Unit heater Packaged heating unit entral warm air heating system 20. ccording to NFP, which of the following may be used as a return air plenum? Spaces above ceilings in which furnaces are installed. n adjacent public corridor used as a means of egress. n under floor space free of combustible material n adjacent bathroom next to a kitchen. hollow wall space constructed of sheetrock and wood. 21. ccording to NFP, the minimum side plenum clearance of a 200 degree F outlet air temperature limit control listed forced air system, installed in a room much larger than the size of the furnace, is from combustible material. 0 inches 1 inch 2 inches 3 inches 4 inches 22. In accordance with NFP, electric furnace systems shall have at least one register without a closeable shutter, and the duct leading thereto shall be without a damper, except where dampers and shutters cannot shut off more than of the duct area. 50 percent 60 percent 70 percent 80 percent 90 percent 1 xam Prep NFP 90 4

5 23. ccording to NFP, temperature limit controls of a listed type shall be located no more than downstream from the heat exchanger. 60 inches 48 inches 40 inches 36 inches 24 inches 24. ccording to NFP, a floor space used as a heated air supply plenum shall be restricted to of singlefamily dwellings. One-story portions Two-story portions Three-story portions Four-story portions Five-story portions 1 xam Prep NFP 90 5

6 NSWR KY 1 NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP NFP 90 Table No answer 20 No answer 21 No answer 22 No answer 23 No answer 24 No answer 1 xam Prep NFP 90 6