NYC HIGH PRESSURE STEAM EXAM QUESTIONS AND ANSWERS, LATEST UPDATED 2024/2025 (GRADED)

NYC HIGH PRESSURE STEAM EXAM QUESTIONS AND ANSWERS, LATEST UPDATED 2024/2025 (GRADED) The maximum blow down for a safety valve on a forced flow steam generator or high temperature water boiler shall be of what percent of the set pressure? - Answer - 10%. HP Code: 14-9.12 3 Who oversees the code for any plumbing installations? - Answer - The NYC Plumbing Code NYC Mech: 1002.1 4 When will anchorage or guides be inspected? - Answer - Annually. NYC Mech: 1210.3.1.2 5 How many brass washout plugs does a miniature boiler have? - Answer - Not less than 3 Brass Washout Plugs 1 inches in size. HP Code 14-11.5 6 How often are high pressure piping expansion joints inspected? - Answer - Weekly RCNY: 20-02 a.2.i (HP steam piping). NYC Mech: 1210.3.1 (hydronics - monthly) 7 How long should a Hydronic System be pressure tested for? - Answer - 2 hours at no less than 100 PSIG. NYC Mech: 1208.1 8 How is a gauge protected from excessive pressure? - Answer - Shut off Cock RCNY: 20-03 c,7 9 Who is authorized in witnessing a test on a gas piping system? - Answer - Plumbing Inspector, Architect, Licensed PE, Master Plumber, or Agency by the D.O.B RCNY 20- 01 a,1,2 10 How should a remote disconnect be labeled? - Answer - Remote control for burner. NYC Mech: 1006.8.1 11 When is a fusible plug not needed to be installed on a boiler? - Answer - Over 200 PSIG. HP Code: 14-10.17, b 12 When shall a power boiler with a MAWP over 400 be tested? - Answer - Pressure tested annually ( safety valve). HP Code: 14-9.7, a,2 13 What shall a Design plan of a boiler and application contain but not limited to? - Answer - Size + Location, Operating Pressure + Temperature of the Pressure vessel, and Type + Specification of Pressure Relief. 14 Who is responsible for maintaining the copies of the certified welder qualifications report? - Answer - Copies of the certified welder qualification report she'll be maintained by the responsible WELDING AGENCY and the company performing the welding, and shall be made available upon request to the DOB. RCNY: 20-02, b,2v,/22-01,d,5. HP Code: 14-3.7 NYC HIGH PRESSURE STEAM EXAM QUESTIONS AND ANSWERS LATEST 2024/2025 (GRADED) 15 Who needs to furnish a control diagram and boiler operation instructions? - Answer - The Installer. NYC Mech: 1004.7 16 Who will certify and calibrate all gauges utilized for testing? - Answer - All gauges utilized for testing shall be calibrated and certified annually in accordance with ASME B40.100 by the test operathor. NYC Mech: 1011.2 17 What shall be placed in between different joints and piping material? - Answer - An approved Adapter Fitting NYC Mech: 1203.1.2 18 What items are exempt from the reporting requirements? - Answer - Exemptions: (1) the installation of backing rings in handhole or manhole openings or the building up of same; and (2) the seal welding of tubes to the tube sheet. HP Code: 14-3.4, b, 1-2 19. Who will be under control for any welding done to a High-pressure tank? - Answer - The welding shall be under controlled inspection of an ENGINEER, supervising a welding inspection agency acceptable to the DOB RCNY: 22-01 d,2 20 At what pressure is it required to have extra heavy valves installed? - Answer - HP Code: 14-10.21b / 14-9.2,b 21 The -------------- files an application for a boiler alteration - Answer - Inspector HP Code: 14-3.3 c, 2, ii 22 How many safety valves does a boiler have with over 500 square feet of heating surface? - Answer - At least 2 HP Code: 14-9.4a 23 Gas fired Boilers not exceeding 100 square feet of heating surface shall de provided with a ? - Answer - Single or Double Cone type of Hood Diverter in the stack HP Code: 14-6.2 24 A heater for either liquid fuels or other liquids harmful to the boiler shall not be installed? - Answer - Directly in the steam or water space within a boiler. HP Code: 14- 5.1 25 Who is responsible for any spatial relationship between tanks and gas services? - Answer - The Installer of the last installation to correct the violation. RCNY: 22-01, c,3 Who is responsible for the setting of operating and safety controls? - Answer - The Installing Company NYC Mech: 1004.7 27 With what safety fitting shall you protect High Pressure Steam and Water boilers with? - Answer - DUAL Low Water Cut Outs. NYC Mech: 1007.1. HP Code: 14- 1. 14, a 28 Spring loaded safety valves have a total combined relieve capacity of? - Answer - 100% of the Max Designed Capacity of the Boiler. HP Code: 14-9.5, b 29 What is the total combined relieving capacity of power actuated relieving valves? - Answer - NO LESS THAN 10% of the MAWP or NO HIGHER THAN 20% ABOVE the MAWP. HP Code: 14-9.5, a, b 30 What is the minimum blowdown for a spring-loaded safety valve? - Answer - 2%. HP Code: 14-9.12 31 When a boiler is de-rated what changes? - Answer - The MAWP Decreases and the BTU Output. HP Code: 14-3.21, a 32 In Hydronic piping systems where shall a shutoff valve be installed? - Answer - Shutoff valves shall be installed on both sides of a pressure-reducing valve. NYC Mech: 1205.1.4 33 Hydronic piping joints between steel tubing and fittings shall be? - Answer - Mechanical or Welded NYC Mech: 1203.14 34 What appears on the plate of a boiler? - Answer - Serial #, Name of Manufacturer, Serial # of manufacturer, MAWP, Heating Surface, Year Built, and Rated Steam Capacity. HP Code: 14-9.43, d (1-6) 35 Waste Gas removal of a boiler shall conduct the products of combustion where? - Answer - To the atmosphere. HP Code: 14-6.1 36 When a quick closing valve creates water hammer what is installed on the line? - Answer - An engineered water-hammer arrestor shall be installed. NYC Mech: 1206.7 37 Safety valve capacity may be checked in what 3 ways? - Answer - Accumulation Test, Amount of Fuel Burned, Evaporative Capacity of Feed water. HP Code: 14-10.14 (1-3) Records of inspects are kept where? - Answer - On the premises. RCNY: 20-02,a,2iii 39 No joint anchorages or guides shall be repaired replaced or relocated without a work permit issued by the department this shall not apply to the reap king of a _____________________ or ___________________ joint. - Answer - Ball or Slip Joints. RCNY: 20-02, a ,3 40 Internal high pressure inspection requires the boiler to be __________________,_____________________,_____________________ and ________________________. - Answer - Shutdown, Drained, Removal of Hand and Man Holes. HP Code: 14-2.1,b.1-6 41 The outlet of the blow-off tank is what size? - Answer - 2TIME the diameter of the Blowdown piping, 6 INCHES INTERNAL entering the bottom of the blow off tank. HP Code: 14-1.2,b 42 What info is not necessary to send to D.O.B? - Answer - Use, Type, Size, Location, Operation Temp. Of Pressure Tank, and Location, Type, Specs of Pressure Relief Valve RCNY: 22-01, b,1-3 43. Miniature boiler specs are ---------- I.D --------- ft gross volume -------- ft water heating surface -------- MAWP - Answer - 16 Inner Diameter, 5 ft Gross Volume, 20 ft of heating surface, less than 100 PSIG. HP Code: 14-11.1 44. Safety valve popping tolerance + capacity up to 70 PSIG ? 71-300 PSIG? 301-1000 PSIG? 1000 psig? - Answer - 70 PSIG = 2 PSIG, 71-300 PSIG = 3%, 301-1000 PSIG = 10 PSIG, 1000 PSIG + = 1%. HP Code: 14-9.12 45. What are other ways of testing safety or relief valve for rated capacity? - Answer - Accumulation test, Amount of Fuel Burned, Evaporative Capacity of Feed water. HP Code: 14-9.9,d,1-3/ 14-10.14,a,1-3 46. What if someone is found not following the rules and regulation for gas piping inspections? - Answer - Revocation of License RCNY: 20-01,d 47. What range of the gauge shall not excess when using a magnitude of 5 PSIG? - Answer - 10 PSIG RCNY: 20-03,d,4 48. What can be connected to the float chamber or water column? - Answer - A Damper Regulator, a Feed water Regulator, a Gauge, a Drain. HP Code: 14-9.36,5 49. On a steam gauge what keeps the tube filled with water? - Answer - A Siphon HP Code: 14-9.19,a 50. The minimum working clearance around boilers is -----------? Vertical ----------? - Answer - The NYC code says 18", while the High Pressure code says 24" | both Vertical 7ft NYC Mech: 1004.3, 4-6.41,a,b/ 1004.3.1 HP Code: 14-2.2 51. Boilers shall have all controls set adjusted, and tested by - Answer - Hot water and steam boilers shall have all operating and safety control set and operationally tested by the INSTALLING CONTRACTOR. NYC Mech: 1004.7 52. Muffler shall - Answer - Have sufficient outlet area to prevent back pressure HP Code: 14-9.11,a 53. External piping of a desuperheater in relation to a boiler has a --------- valve - Answer - {EXTERNAL} Stop Valve. HP Code: 14-9.14,c 54. What shall a boiler with a MAWP (Maximum Allowable Working Pressure) up to 400 psi be tested? - Answer - Once a year. HP Code: 14-9.7,a,I, 55. What is the minimum safety or relief valve capacity for electric boilers? - Answer - 3 1/2 lb/hr/kw input. HP Code: 14-9.9,4 56. After welding repairs or alterations of the equipment, who shall retain a copy of the report? - Answer - THE OWNER of the equipment shall retain a copy of the report for review by an authorized inspector. HP Code: 14-3.4,a 57. Any boiler changing location within the state may be reinstalled; an application for permission to install a second-hand boiler is filled with whom? - Answer - Commissioner. HP Code: 14-4.1 58. When is it necessary to go on top of boilers for maintenance how much clearance is needed? - Answer - 7 FEET . NYC Mech: 1004.3.1. HP Code 14-2.2 59. Wet bottom boilers should be set above the floor no less than? - Answer - 12". HP Code 14-2.2,c 60. How do you set the pressure of the safety and relief valves? Find the -----------? - Answer - Find the Nameplate of the safety valve. HP Code: 14-9.8 61. If there is one safety valve on an electric boiler what is the maximum output? - Answer - Less than 1100 kW 62. What pressure shall a system using utility street steam be designed for? - Answer - 200 PSIG at 413* F which that is required by a pressure reducing valve . RCNY: 1210.2.1,2 chemical should be used for oxygen scavenging? - Answer - Sodium Sulfite or Sodium Hydroxide 64. What is the minimum distance from the wall to the boiler? - Answer - 18" NYC Construction Code, 24" in High Pressure Code. NYC Mech: 1004.3. HP Code: 14-2.2 65. What is the lowest part of a water gauge? - Answer - 2" above the lowest permissible water level HP Code: 14-9. 16,b 66. What standards are used on gauges? - Answer - ASME, ANSI. RCNY: 20-03,a,1 67. What is the only thing that could tap onto a low water cut-off? - Answer - A Drain. HP Code: 14-1.14,b,10/ 14-9.36,b,2 68. How many expansion tank are needed for 6 boilers? - Answer - 1. NYC Mech: 1009.1 69. Who shall design the boiler system? - Answer - A registered Architect or a Licensed Professional Engineer. 70. Gauge to be measured in the magnitude of 5 PSIG shall not be calibrated in no less than? - Answer - " The gauge shall be calibrate in increments not greater than one-fifth of a pound". RCNY: 20-03,d,3 71. At what percent do you hydrostatic ally test a boiler? - Answer - 150%. HP Code: 14-9,40/14-10.24 72. Beside a log book being inspected by a state boiler inspector who else can look at the book? - Answer - The insurance company. HP Code: 14-1.13,c 73. What is the difference between low pressure and high-pressure safety relief valves? - Answer - Low pressure relieves to a drain, while High pressure relieves ego a vent HP Code: 14-11.10,c/14-10.16/14-9.,a LP Code: 4-5.4,1 74. What is the minimum dial arc on a 2 1/4 gauge? - Answer - 270* RCNY: 20-03,c,2 75. Where is the steam gauge installed on a mini boiler? - Answer - On the steam space side. HP Code: 14-11.9 76. What is an effective stop for a gauge? - Answer - The indicating point at ZERO. RCNY: 20-03,c,6 77. How long is the pre-purge on a low pressure boiler? - Answer - 90 seconds. LP Code: 4-9.4,b/4-9.5,a 78. What does the stamp (S) mean and the stamp (h) mean? - Answer - S= Means Power Boiler. H= Means Low Pressure Boiler. HP Code: 14-9.43,b - high. LP Code: 4- 1.15 - low 79. Each superheater she'll be equipped with how many drains? - Answer - At least 1. HP Code: 14-9.26/ 14-9.30. 80. How often does an insurance inspector inspect the boilers? - Answer - Annually 81. What is the work done to a boiler that doesn't have to be reported and is exempt? - Answer - Replacement of Backings to Man Holes and Hand Holes and Seal Welds to Tubes 82. How do you prepare a Brazed joint? A weld? - Answer - Braze: Clean, Flux, Heat, Filler Metal Weld: Clean Convex, Weld a Filler Metal, Wire Wheel 83. Mufflers are not to be installed on ---------? - Answer - High temperature hot water boilers. HP Code: 14-9.11 84. What will happen if your strainers from your discharge and supply lines are clogged? - Answer - Deep Vacuum. 85. How many safety valves are on a miniature boiler? - Answer - At least 1 ( since only 20 sq ft ). HP Code: 14-11.10 86. When connecting two different types of metallic pipe what is used in between? - Answer - A dielectric fitting. NYC Mech: 1203.1.2 87. Where do you install gas service or distribution line from a new high pressure tank? - Answer - " All new high -pressure tank [ sic] installations she'll be located in ROOM SEPARATED from gas service or distribution lines." RCNY: 20-01,c,2 88. How many square feet of heating surface does a fusible plug require? - Answer - 50 sq ft. HP Code: 14-1.15 89. Where does a low pressure safety and relief discharge to? - Answer - The drain. LP Code: 4-5.4,i 90. Electric boilers have two or more safety valves at a power output of __________ KW - Answer - 1100 KW or more. HP Code: 14-9.4,a 91. If an electric boiler is operating at a max of 1100 kW how many safety valves are required? - Answer - 2 HP Code: 14-9.4 92. When is a bullseye water sight glass acceptable on a miniature boiler? - Answer - When there is insufficient space for a gauge glass on a mini boiler. HP Code: 14-11.8 93. After an inspector notice is given to the owner where is it posted? - Answer - On or close to the boiler HP Code: 14-1.3,c 94. What type of welding shall pipes of 2" or more have? - Answer - Butt Welding. NYC Mech: 1210.2.2.6.1 (2"). RCNY: 20-02,b,2,vii,a 95. Gauge measure in the magnitude of 3 PSIG calibrated in increments of? - Answer - " The gauge shall be calibrated in increments of not greater than ONE-TENTH of a POUND" RCNY: 20-03,c,3 96. What are the minimum and the maximum temp when performing a hydrostatic test? - Answer - Above Ambient Temperature CODE: 70-120*F. HP Code: 14-3.3,d 97. Where does a low pressure safety and relief valve discharge to? - Answer - A drain. LP Code: 4-4.4,i 98. How do you prepare a soldered joint? - Answer - Joint surfaces shall be CLEANED. A FLUX conforming to ASTM B 813 shall be applied. The joint shall be SOLDERED with a solder conforming to ASTM B 32." NYC Mech: 1203.3.3 99. How often do you bottom blow off? - Answer - " Bottom blow off valves shall be tested DAILY when the boiler is in operation". HP Code: 14-9.29,f 100. Who authorizes changes to High Pressure piping anchors, guides and expansion joints without effect to health and safety? - Answer - The professional Engineer. RCNY: 20-02.3. NYC Mech: 1210.3.2 101. When installing an expansion tank what factor is taken into consideration? - Answer - The MAWP (maximum allowable working pressure) of the boiler system. NYC Mech: 1009.1 102. If you are reading 12% Co2 what does it pertain to? - Answer - Incomplete Combustion 103. When should you inspect expansion joints? - Answer - Weekly. RCNY: 20-02,a,2,i 104. How far does a pressure tank have to be away from any gas services? - Answer - 5 feet horizontal. RCNY: 22-01,c,1 105. Where is a remote disconnect located? What is it labeled? - Answer - Remote control for burner, located at the egress. NYC Mech: 1006.8.1 106. What range should a gauge with a magnitude of 3 PSIG shall not exceed? - Answer - 1/10 increments @ 4.5 PSIG (1 1/2 X times). (They might say 5) to 6 PSIG (2x times). RCNY: 20-03,c,4 107. What is the minimum face size of a non Mercury gauge? - Answer - 2 1/4" 108. How many complete turns do a slow opening valve take from full-close to fullopen? - Answer - At least 5 360* Turns. HP Code: 14-9.29,a,2 109. What is the size pipe of the surface blow off? - Answer - 2 1/2" Max. HP Code: 14- 9.27,a,1 110. What is the pipe size of a gauge cock connection? - Answer - 1/2". HP Code: 14- 9.18,c 111. How many gauge cocks are needed if a boiler is not over 36 inches in diameter and does not exceed 100 sq feet of heating surface? - Answer - 2 HP Code: 14-9.18,b 112. How do you protect a bottom blow off pipe when exposed to direct furnace heat? - Answer - " She'll be protected by FIREBRICK, or other heat-resisting material, so arranged that the pipe may be inspected". HP Code: 14-9.29,c 113. Who has prior approval by the D.O.B When an eminent health or safety hazard happens? - Answer - The professional Engineer. NYC Mech: 1210.3.2 114. If a muffler is installed on a safety valve or safety relief valve it shall? - Answer - " shall have sufficient outlet area to PREVENT BACK PRESSURE from interfering with the proper operation and discharge capacity of the valve". HP Code: 14-9.11,a 115. What do you do when adding a new tube to a boiler? Water tube boiler ? Afire tube boiler? - Answer - Water Tube - expanded and flared/ Fire tube - expanded and beaded, welded. HP Code: 14-9.2,a (water tube)/ 14-9.1,a,1 (fire tube) 116. Prior to the Clean Air act what were boiler operations concerned with? - Answer - Sulfur Dioxide 117. What standard is plastic pipe/pvc in Hydronic systems held to? - Answer - ASTM. NYC Mech: 1202.4 118. What boiler should be used for hot water? - Answer - A low pressure hot water boiler " which operate at a pressure not exceeding 160 psi or a temperature of 250 degree F at or near the boiler outlet". HP Code: 14-1.1,p,q 119. What is portable water? - Answer - Drinking Water. NYC Mech: 1002.1 120. What is the flame index of Insulation? - Answer - " shall have a maximum flame spread index of 25" 121. What is the flame spread index of smoke density? - Answer - " a smoke - developed index not exceeding 450" NYC Mech: 1204.1 122. What are the allowed takings of a water column? - Answer - Feed water Regulator, Damper Regulator, Drain, Steam Gauge. HP Code:14-9.36,5 123. What is the seat of a safety valve composed of? - Answer - High Pressure is Stainless " shall be of suitable material to resist corrosion", Low Pressure is Bronze/Stainless "shall be of material suitable to resist corrosion". HP Code: 14-9.13,b. LP Code: 4-5.3,d 124. What is the minimum reading of a digital gauge? - Answer - 1/1000 of a PSIG.