C20 TEST EXAM 2024 WITH 100% ACCURATE SOLUTIONS

Cable contains a black wire, white wire, and smaller uncoated copper wire. What to do with copper wire? - ANSWER ☑☑Ground it Needle on volt meter shows infinite ohms. What does this indicate? - ANSWER ☑☑Switch or circuit is open Difference between a gravity-type heating system and forced air is that the gravity type relies on _______________ for air distribution - ANSWER ☑☑Difference between hot and cold air What is the most efficient propane flame - ANSWER ☑☑soft blue flame with slightly yellow tips which gage would you use to test manifold gas pressure - ANSWER ☑☑U-Tube water manometer If a furnace is installed in the attic, the minimum access opening is - ANSWER ☑☑22" x 30" What is the temperature setting for a high limit switch on a gas furnace - ANSWER ☑☑250*F If you installed a heating system and some rooms are much colder than the rest of the house, your sho