559 Journeyman Mechanical Exam Questions with 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 Answer Class 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