C20 Test Questions & 100% Verified Answers | Latest Update | Already Graded A

Cable contains a black wire, white wire, and smaller uncoated copper wire. What to do with copper wire? : Ground it Needle on volt meter shows infinite ohms. What does this indicate? : 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 : Difference between hot and cold air What is the most efficient propane flame : soft blue flame with slightly yellow tips which gage would you use to test manifold gas pressure : U-Tube water manometer If a furnace is installed in the attic, the minimum access opening is : 22" x 30" 2 | P a g e What is the temperature setting for a high limit switch on a gas furnace : 250*F If you installed a heating system and some rooms are much colder than the rest of the house, your should : Adjust the damper in every room What is the maximum spacing of support straps for vertical ductwork? : 12' in a thermostat set to the cooling mode, if the fan switch is in the ON position, which additional connections must be made when a conventional systems calls for cooling? : Red to Yellow If you straighten a fin, what is the effect on the coil? : airflow increases and the coil is more effective What is the drip leg used for on gas piping? : to collect moistur