NBIC PART 1 AND 2 EXAM QUESTIONS AND ANSWERS | 2026| GUARANTEED SUCCESS

NBIC PART 1 AND 2 EXAM QUESTIONS AND ANSWERS | 2026| GUARANTEED SUCCESS An operational test may not be used as the final acceptance of the boiler installation. True or False? - answer-False, NBIC Part 2 allows an operational test to serve as evidence that the installation complies with the governing code of construction. When boilers are connected to a common header, they shall be fitted with two step valves having an ample free-blow drain between them, for each boiler having a..... - answer-Manhole (Part 1, 2.7.3) A steam boiler with a fixed water line that operates at 450 psig is required to have... - answer-Two direct reading water-gage glasses (NBIC Part 1, 2.8.1) Austenitic stainless steel steam supply stop valves are permitted in water wetted service. True or false? - answer-False, NBIC Part 1, 2.7.3 prohibits the use of austenitic stainless steel in water wetted service. Prior to initial operation, the completed boiler shall be pressure tested in accordance with the original code of construction and pressure piping and fittings connected to the boiler when shipped shall be... - answer-Hydrostatically tested (NBIC part 1, 2.10.2, 1.6.10) Pressure relief valves shall be connected to the boiler without any unnecessary intervening pipe or fittings.... - answer-Independent of any connection (NBIC part 1, 2.9.1.2c) What type of low-water fuel cutoff is required for an electrode-type electric steam boiler? - answerNone required (NBIC Part 1, 2.8.5e, no low-water cutoff is required for electrode-type boilers) Feedwater other than condensate return shall not be introduced through the blowoff piping. True or false? - answer-True (NBIC Part 1, 2.5.1.2c)An economizer that cannot be isolated from the boiler requires a minimum of.... - answer-0 pressure relief valves, an economizer does not require a pressure relief valve unless the economizer can be isolated from the boiler. If there are two egress doors in a 600 sq. Ft. Equipment room, how many remote emergency shutdown switches will be required? - answer-2 remote emergency shutdown switches. (NBIC Part 1, 2.5.3.2b) A blowdown tank connected to sanitary sewer blowdown water shall be cooled to at least ___________ and the pressure reduced to ___________. - answer-140F, 5 psig (NBIC Part 1, 3.6.3) What is the minimum allowed temperature rating of the stop valve or cock for hot-water heating boiler? - answer-250F (NBIC part 1, 3.7.5.1d) What provisions are required to be made for boiler water fill connections? - answer-A means to prevent back-feeding the service water supply. (NBIC Part 1, 3.5.1b) An expansion tank installed in a hot-water supply system shall be constructed in accordance with an applicable code of construction. True or false? - answer-True (NBIC part 1, 3.7.9.1a) What is the minimum required hydrostatic test pressure of an expansion tank installed in a closed heating system equipped for a hot-water heating boiler designed with a system pressure of 25 psig? - answer-75 psig (In accordance with NBIC Part 1, 3.7.9.1a, if a system is designed for a working pressure of 30 psig or less, the tank shall be suitably designed for a minimum hydrostatic test pressure of 75 psig.) What must be provided in the gravity return pipe connections for a steam-heating boiler to prevent the boiler water from being forced out below the safer-water level? - answer-A loop (NBIC Part 1, 3.7.6a) How many steel brackets on each side are required to support a horizontal return firetube boiler with a 40 in. Diameter in lieu of an outside-suspension type of setting? - answer-2 steel brackets. (NBIC Part 1, 3.3.1.1b, this boiler shall be supported by not less than two steel brackets on each side) What is the set pressure for a steam-heating pressure relief valve? - answer-15 psig (NBIC Part 1, 3.9.2b)