559 Journeyman Mechanical Exam HVAC Complete Questions and Answers

559 Journeyman Mechanical Exam HVAC Complete Questions and Answers Which Type of air-conditoning system is most likely to leak refrigerant into a structure? Direct, Indirect, Evaporative or Split? - CORRECT ANSWER-Direct : 2015 IMC 1103.3.2 When mechanical equipment is located on a flat roof that is more than 30 inches above grade, how far from the roofs edge must the equipment be located before a guard rail is not needed? less than 6', 9', 4' or more than 10'? - CORRECT ANSWER-More than 10' - 2015 IMC 304.11 A mall bathroom exhaust outlet shall terminate a minimum height of ____ feet above an adjoining sidewalk? - CORRECT ANSWER-10 feet above adjoining grade - 2015 IMC 501.3.1 A room that measures 10x20x8 contains a 35,000 BTU wood burning stove in a building classified as unusually tight construction, what size combustions air openings will be required if they are installed directly in a side wall? - CORRECT ANSWER-8.7 square inches (1 square inch per 4,000 BTU) - 2015 IFGC 304.6.1 How many BTUs in one ton of refrigeration? - CORRECT ANSWER-12,000 BTUS - 2015 IMC Definitions p. 17 'Refrigeration Capacity Rating.' Which refrigerant is not classified as a flammable refrigerant? - CORRECT ANSWERClass 1 - 2015 IMC Definitions p. 13 'Flammability Classifications' Grounded circuit conductor shall be identified by a covering or marking by which of the following colors: A) White or Gray B) Green, C) Black or D) Red? - CORRECT ANSWER-White or Gray - 2014 NEC 200.6 What is the minimum distance to a property line that a supply air intake can be located? - CORRECT ANSWER-10' - 2015 IMC 401.4 How many pounds per 1,000 cubic feet of occupied space of R-410A refrigerant can be in a direct system? - CORRECT ANSWER-26 pounds - 2015 IMC Table 1103.1 Which of the following systems is required by code to be periodically tested per the manufacturer's instructions and as required by the code official: Fuel Gas Piping, Venting Systems, Air duct systems or Refrigerant Alarm Systems? - CORRECT ANSWER-Refrigerant Alarm Systems - 2015 IMC 1109.1 A room contains a gas-fired furnace with an input rating of 108,000 BTUs. The room is 20'x10'x8'. Is the room classified as a confined space? Yes or no. - CORRECT ANSWER-Yes (Needs to be 50 cubic feet per 1,000 BTU) - 2015 IFGC 304.51 What is the full load current rating of a 230-volt, three phase alternating current motor rated at 7.5 horsepower? - CORRECT ANSWER-22 amps - 2014 NEC Table 430.250 (Motors, Motor Circuits and Controllers) p. 70-351 What is the maximum flame spread and smoke development ratings for duct covering insulation in an assembly occupancy? - CORRECT ANSWER-25 flame spread, 50 smoke development ratings - 2015 IMC 604.3 For a duct to penetrate a fire partition without the installation of a fire damper the partition opening must be lined with a steel sleeve of what thickness? - CORRECT ANSWER-.060-inch-thick - 2015 IMC 607.5.3 Fire dampers shall comply with the requirements of what standard for testing? - CORRECT ANSWER-UL 555 - 2015 IMC 607.3.1 What size copper conductor is required for a branch circuit using type THHW 75°C conductor installed in a racewa