1 Exam Prep NFPA 99 Health Care Facilities Questions and Answers (Plumbing Contractor)

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1 1 Exam Prep NFPA 99 Health Care Facilities Questions and Answers (Plumbing Contractor) 1. According to NFPA 99, SCFM is an acronym for. a) Surface Conditions at Fahrenheit Mercury b) Standard Conditions at Fahrenheit Mercury c) Standard Cubic Feet per Minute d) Surface Conditions For Meters 2. According to NFPA 99, a pressure not exceeding 200 psig is considered a pressure. a) High b) Partial c) Remote d) Working 3. When brazing joints in a piped vacuum system, must be blown through the lines as a method of purging. (blow down ) a) Oil-free dry nitrogen b) Liquid nitrogen c) Soapy water d) Nitrous oxide 4. After installing a level I piped vacuum system, but before the vacuum source is connected, the system must have a standing pressure test for 24 hours at a minimum test pressure of. a) 30 psig b) 45 psig c) 60 psig d) 300 mm (12 in.) gage HgV 5. With regard to pressure differentials, the alternate test pressure for Nitrous Oxide is what? a) 20 psi b) 30 psi c) 40 psi d) 50 psi 1

2 6. The intake to a medical air compressor which uses an outside source of air shall be located above the ground at least. a) 10 feet b) 15 feet c) 20 feet d) 25 feet 7. Piping shall be supported from the building structure in accordance with. a) Local Code b) Plans c) MSS SP-58 d) MSS SP Which of the following is not true about oxygen cylinders. a) Grease shall not come in contact with valves or fittings b) Valves should be left open on empty stored cylinders c) Cylinders shall not be stored near heat ducts d) Oxygen shall never be substituted for compressed air. 9. Each section of the piping in medical gas and vacuum systems shall be subject to an initial pressure test and examined for leakage. The test pressure for gases shall be 1.5 times the system working pressure but not less than a gage pressure of. a) 60 psi b) 100 psi c) 125 psi d) 150 psi 10. When cleaning the interior surfaces of level I distribution piping and controls on site, clean, hot wateralkaline solution, such as sodium carbonate or trisodium phosphate may be used at a rate of. a) 1 gallon to 3 gallon of potable water b) 1 gallon to 4 gallons of potable water c) 1 gallon to 5 gallons of potable water d) 1 pound to 3 gallons of potable water 11. Which of the following is not a level 1 pipe labeling requirement? a) At intervals of not more than 20 feet b) At least once in or above every room c) On both sides of walls or partitions penetrated by the piping d) At least once every other story height traversed by risers 2

3 12. Flexible connectors of other than all-metal construction used to connect outlets of pressure regulators to fixed piping shall not exceed in length, for a level 3 piping system. a) 24" b) 48" c) 60" d) 72" 13. 1" nominal copper tubing for level 3 shall be supported from the building structure a maximum of feet on center. a) 6' b) 7' c) 8' d) 9' 14. A level I pressure relief valve will be set at psig for a gas central supply system operating at 110 psig. a) 110 b) 165 c) 175 d) Which of the following is a correct statement about medical air compressor systems? a) Medical air receivers shall be provided with a 3-valve bypass. b) Dryer systems shall be at least duplexed and valved. c) In no case shall there be fewer than 2 compressors. d) All of the above are correct. 16. The NFPA 99 scope includes the installation of nonflammable medical gas and vacuum systems with operating pressures below psi. a) 150 b) 200 c) 250 d) A cylinder of non-flammable medical gas, in storage, shall be protected or located so that the temperature of the cylinder, in no case exceeds degrees C. a) 54 b) 72 c) 130 d) 212 3

4 18. The enclosure surrounding stored level 1 central supply system oxygen or nitrous oxide cylinders shall be constructed of building materials with a fire-resistive rating of at least minutes. a) 15 b) 30 c) 45 d) Electrical devices or switches, in accordance with NFPA 70, shall be installed in locations not less than inches above finished floor to avoid physical damage. Assume a Level l system. a) 36" b) 42" c) 60" d) 72" 20. A level I system cylinder not connected for use shall have its valve protection cap. a) Removed until connection with the piping b) Secured tightly in place c) Labeled with red letters, minimum 2" in height d) Hand tight for ready removal 21. The compressor air intake for level 1 shall be located outdoors above roof level, at a minimum distance of from any door, window, exhaust, other intake, or opening in the building and a minimum distance of above the ground. a) 10', 10 b) 25', 25' c) 25', 10' d) 10', 20' 22. When a level 1 storage location's capacity for non-flammable gases is less than 3,000 cubic foot (connected and in storage), its natural ventilation means shall provide a minimum of square inches of total free area. a) 36 b) 72 c) 144 d) A shall be installed between each cylinder lead and the manifold header to prevent the loss of gas from the cylinders in the event the pressure relief device fails on cylinder systems without reserve supply. a) Shutoff valve b) Cylinder valve c) Check valve d) Flex hose 4

5 24. Where provided, that portion of the source equipment that automatically supplies the systems in the event of failure of the primary and secondary operation supply is called what? a) primary supply b) secondary supply c) reserve supply d) backup supply 25. Pressure relief valves for a gas central supply system that are set at 50 percent above normal line pressure shall vented to the outside if the total capacity of the supply system is cubic feet or more of gas. a) 3,000 b) 2,000 c) 1,500 d) 1, The organization, office, or person responsible for approving equipment, installations, or procedures is by definition. a) The Technical Correlating Committee b) The Authority Having Jurisdiction c) The Fire Marshall's office d) The Area Administrator 27. Evacuation waste gas is referenced in the section called. a) Suction tubing b) Indirect waste systems c) Exhaust hoods d) Waste Anesthetic Gas Disposal (WAGD) 28. In a level I gas distribution system, the master alarm warning system shall consist of alarm panels in two locations. a) 2 b) 2 or more c) 3 d) 3 or more 29. Alarm areas for anesthetizing gas delivery shall have the sensors installed for each such area. a) On the source side of any of the individual room zone valve box assemblies b) On the control panel c) Prior to the main trunk line supplying d) Upstream from the junction box 5

6 30. With regard to level I distribution, tubes shall be hard-drawn seamless copper ASTM B819 medical gas tube, Type L, except that where operating pressures are above a gauge pressure of 185 psi., Type K shall be used for sizes larger than O.D. a) 1/4" b) 3/8" c) 112" d) 3 1/8 in. 31. Turns, offsets, and other changes in direction in medical gas and vacuum piping shall be made with wrought copper capillary fittings or complying with ASME B a) Flared fittings b) Coupled unions c) Brazed fittings d) Compression type fittings 32. The minimum backfilled earth cover required above the top of buried piping located outside of buildings shall be, where physical damage to the piping is not likely to occur. a) 12" b) 18" c) 24" d) 36" 33. Medical gas riser piping shall be permitted in which location? a) Pipe shafts if protected from physical damage, heat, etc. b) Electrical service equipment of 660 volts c) Elevator shafts d) Kitchens 34. Flexible connectors, metallic or nonmetallic, shall have a minimum burst pressure of. a) 1,000 psia b) 1,000 psi c) 1,500 psia d) 1,500 psig 35. Level 1 tubes shall be hard-drawn seamless copper ASTM B 819 medical gas tube, Type L, except that where operation pressures are above a gauge pressure of 185 psi, shall be used for sizes larger than 3 1/8 in. O. D. a) Type M b) Type L c) Type K d) Soft 6

7 36. Mains, branches, and drops to individual service outlets in level 3 oxygen piping systems shall be not less than O. D. a) 1/8" b) 1/4" c) 3/8" d) 1/2" 37. A level 1 piped vacuum system source shutoff valve is placed. a) Immediately downstream of the receiver tank b) On the outlet side of the receiver tank, by the pump c) Between the zone valve and the patient outlet d) At the immediate connection of each source system to the distribution piping to permit the entire source, including all accessory devices. 38. During pressure testing of a level 1 vacuum system piping a brazed joint is found to be defective. The joint was repaired, testing resumed, and again the joint was found to be defective. Which of the following is acceptable, regarding the defective joint. a) Repair the joint again; it was probably due to flux residue b) Repair the joint again; it was probably due to excessive oxidation c) Repair the joint again, a crack was discovered in the tube d) Replace the joint, no joint shall reheated more than once before being replaced 39. In a level 1 piped gas system, the piping purge test shall be conducted by obtaining the appropriate adapter from the manufacturer and subjecting the pipe to a high purge rate of at least on each outlet. a) 30 gpm b) 8 SCFM c) 12 fpm d) 125 L / hour 40. Level 1 vacuum pumps and collection piping shall be capable of maintaining a vacuum of of mercury at the station inlet farthest away from the central vacuum source. a) 6 inches b) 12 inches c) 14.7 inches d) 6 hg 41. Generally, piping materials for field-installed positive pressure medical gas systems shall. a) Be seamless copper ASTM B 819 medical gas tube, Type L b) Be either aluminum or stainless steel c) May be made from cast iron d) Not be required to be brazed 7

8 42. Union joints may be made for medical gas and vacuum distribution pipeline systems when which of the following is accomplished? a) The unions are flared b) The unions are compression-type c) The unions are straight-threaded d) Unions are prohibited joints 43. Welded joints for medical gas and vacuum systems shall be permitted to be made using. a) Silver solder filler b) Copper-Phosphorus-Silver filler c) a Certified Plumbing Contractor d) Gas tungsten arc welding 44. Initial pressure tests for piping involving medical gases are done how? a) Using air or carbon dioxide at 1.5 times the system pressure not to be less than ISO psi b) Can be tested with 0 2 at 2 times the system pressure c) Using oil-free, dry nitrogen at 1.5 times the system pressure not to be less than ISO psi d) May be tested with CO at 2.0 times the system pressure not to be less than 250 psi 45. Which of the following is not correct with regard to standing pressure tests involving medical gases? a) The tests must maintain pressure for 24 hours b) The tests must be at least 20% above normal system pressure c) Test pressure must not be less than 300 mm (12 in.) gage HgV d) Test medium may be air or carbon dioxide 46. Where natural ventilation is permitted, it shall consist of 2 louvered openings, each having a minimum free area of with one located within 1 foot of the floor and one located within 1 foot of the ceiling. a) 50 square inches b) 72 square inches c) 100 square inches d) 144 square inches 47. Flexible connectors of other than all-metal construction used to connect outlets of pressure regulators to fixed piping shall not exceed in length and shall not penetrate walls, floors, ceilings, or partitions. a) 2 feet b) 4 feet c) 5 feet d) 10 feet 8

9 48. A piping verifier purity test's dew point shall not exceed 500 ppm at? a) 12 degrees C. b) 10 degrees F. c) 59 degrees F. d) 15 degrees C 49.Medical gas piping shall be permitted to be installed in the same service trench or tunnel with fuel gas lines, fuel oil lines, electrical lines, steam lines and similar utilities provided that the space is ventilated (naturally or mechanically) and the ambient temperature around the medical gas piping is limited to degrees F maximum. a) 54 b) 130 c) 250 d) Medical-surgical vacuum inlets shall draw without reducing the vacuum pressure below 12 inches gauge HgV at any adjacent station inlet a) 0.3 SCFM b) 3.0 SCFM c) 12 SCFM d) 30 SCFM 9

10 1 Exam Prep NFPA 99 Health Care Facilities Answers Answer: C Answer: D Answer: A , Answer: D Answer: C & Table & Table (B) 6 Answer: C (C) 7 Answer: D Answer C: Answer: B Answer: D Answer: D Answer: D (1)(2)(3)(4) (1)(2)(3)(4) 12 Answer: C Answer: C Table Table Answer: B (2) (2) 110 psig x 1.50 = 165 psig pressure relief valve is set 50% above the line pressure 15 Answer: D , , , (B), (D), , (E), (F) 16 Answer: D (1) (1) 17 Answer: A and and Answer: D (4) (4) 19 Answer: C (5) A (5) 20 Answer: B Answer: D (C) & (D) 22 Answer: C (E) 72 x2 = Answer: C Appendix A, Figure A (a) Figure A (a) Caption: "Gas-specific cylinder lead connector contains a check valve" 24 Answer: C Answer: A (4) (4) 10

11 Answer: B Answer: D , , see evacuation - waste gas, Answer: B Answer: A (2) (2) 30 Answer: D Answer: C Answer: B Answer: A , , Answer: B , Answer: C Answer: D (1) 37 Answer: D Answer: D Answer: B Answer: B Answer: A , , Answer: D Answer: D Answer: C , , Answer: D , , , , , , Answer: B , Answer: C Answer: B (5) Answer: B Answer: B