Master Mechanical License Questions and Answers Graded A+

Master Mechanical License Questions and Answers Graded A+ A permit shall become invalid if NOT used within how many days of issue 180 Days All of the following info. is required to be on an electric comfort appliance cable EXCEPT manufactures' date code The room or the space where a boiler will be installed shall have a min. of how many times the volume of the boiler 16 The volume of a room compared to the volume of a furnace to be installed is based on what max. ceiling height 8 ft A fuel burning appliance is located in a private garage & is protected from motor vehicle impact. The appliance shall have its ignition sources installed by what min. distance above the floor? 1 1/2ft When more than 1 heating, cooling, ventilating system is installed on a roof of a building, each system shall be... permanently identified by the area or space served by the equipment What min. work space is required in front of a warm air furnace in an attic? 30X30 What are the requirements to install a warm air furnace in an attic? A lighting fixture controlled by a switch at the entrance of a door A warm air furnace is to be installed on a building roof that has a 6 in 12 slope, the cat walk requirements for the installation shall have a min. width of 24" What shall be installed at an approved location to shut off fans or blowers in flammable vapor or dust ventilation systems? manually operated remote control A type1 hood shall have what min. clearance to combustible materials? 18" What min. pitch per foot is required for the horizontal run of a vent? 1/4" What min. horizontal clearance is required between an operable window & an appliance vent terminate? 4' A vented wall furnace shall be installed so that a door cannot swing within what distance of the furnace air inlet or outlet? 12" A floor furnace can be installed under all the following EXCEPT placed on a concrete pad The return air duct to a blower type furnace is being replaced how many sq in of free air are required per 1,000 BTU of rated capacity of the furnace? 2" What is the min. clearance required between a manhole cover installed at the top of a boiler & the ceiling directly above? 3' All the following of boilers require valves in their supply & return lines EXCEPT Low pressure (15psi) steam boilers