HVAC Journeyman Final Prep Study Exam Questions and Answers

HVAC Journeyman Final Prep Study Exam Questions and Answers In wood structures, notches on the end of the joists shall not exceed ___________ the joist depth. A. one fourth B. 6% of C. 1/2 of D. 10% of - CORRECT ANSWER-A. one-fourth Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and ___________ backfill is put in place. When excavated soil contains rocks, broken concrete, frozen chunks, and other rubble that would damage or break the piping or cause corrosive action, clean backfill shall be on the jobsite. A. after B. before C. as the - CORRECT ANSWER-B. before For a gas appliance, the volume of gas to be provided, in cubic feet per hour, may be determined ___________________ A. where an input rating is not indicated, from the gas supplier B. where an input rating is not indicated, from the appliance manufacturer C. directly from the manufacturers input ratings of the appliances served D. all of the above - CORRECT ANSWER-D. all of the above Hazardous exhaust systems shall be ________ other types of exhaust systems A. used in conjunction with B. installed higher than C. independent of D. none of these - CORRECT ANSWER-C. independent of A manually or automatically controlled device to regulate draft or the rate of flow of air or combustion gases A. air valve B. power air controller C. damper D. check valve - CORRECT ANSWER-C. damper Ducts and air transfer openings constructed of approved materials, in accordance with Section 603, that penetrate the ceiling membrane of a fire-resistance - rated floor/ceiling or roof/ceiling shall be protected with which of the following: A. a shaft enclosure in accordance with Sections 707 of the International Building Code B. a listed ceiling radiation damper installed at the ceiling line where a duct penetrates the ceiling of a fire-resistance-rated floor/ceiling or roof/ceiling assembly C. a listed ceiling radiation damper installed at the ceiling line where a diffuser with no duct attached penetrates the ceiling of a fire-resistance-rated floor/ceiling or roof/ceiling assembly D. one of the above - CORRECT ANSWER-D. one of the above For duct conveying explosive or flammable vapors, fumes or dust, the termination point of exhaust outlets and ducts discharging to the outdoors shall be located a minimum distance of ________ above adjoining grade A. 10 feet B. 20 feet C. 30 feet D. 40 feet - CORRECT ANSWER-A. 10 feet Type 1 hoods shall be secured in place by ____________ A. galvanized steel brackets B. wood, plastic, or metal supports C. metal supports D. noncombustible supports - CORRECT ANSWER-D. noncombustible supports In hydronic piping systems shut offs shall be installed on _______ of a pressure reducing valve A. the supply side B. the return side C. both sides D. any of these - CORRECT ANSWER-C. both sides Every steam boiler shall have a __________ A. water-gauge glass and a pressure gauge B. water-gauge glass C. pressure gauge D. A or B and C E. none of these - CORRECT ANSWER-D. A or B and C The minimum chimney connector thickness for a low-heat appliance with a 6" diameter connecter is: A. 16 gauge B. 24 gauge C. 12 gauge D. 10 gauge - CORRECT ANSWER-B. 24 gauge The gauging of inside oil tanks by means of measuring sticks shall _________ A. be the method of choice B. be permitted C. not be permitted - CORRECT ANSWER-C. not be permitted Provisions shall be made to prevent the formation of condensation on the ________ of any duct A. interior B. exterior C. surface D. none of these - CORRECT ANSWER-B. exterior Solid fuel-burning appliances shall be provided with combustion air in accordance with the appliance ________ A. BTU rating B. IFC requirements C. manufacturers installment instructions D. none of these - CORRECT ANSWER-C. manufacturers installment instructions Every refrigerant-containing part of every system that is erected on the premises, except compressors, condensers, vessels, evaporators, safety devices, pressure gauges, and control mechanisms that are listed and factory tested, shall be tested and proved tight after complete installation, and before operation. Tests shall be performed with an inert dried gas including, but not limited to, nitrogen and carbon dioxide. ___________ shall not be used. Exceptions ignored A. oxygen B. air C. combustible gases D. all of these E. none of these - CORRECT ANSWER-D. all of these Duct registers, grilles, and diffusers shall have __________ or other means of supply air adjustment shall be provided in the branch ducts or at each individual duct register, grille, or diffuser A. backdraft dampers B. louvered deflectors C. volume dampers D. check valves - CORRECT ANSWER-C. volume dampers Condensate drains shall not b