InterNACHI questions with correct answers

b. end 1 inch above the waste drain line CORRECT ANSWER A condensate line should ______________. a. empty directly into the waste drain line b. end 1 inch above the waste drain line c. not drain into the waste drain line d. extend at least 1 inch into the waste drain line c. is more efficient than conventional furnaces and uses a secondary heat exchanger CORRECT ANSWER A condensing furnace _____________. a. works like an air conditioner, except that it heats instead of cools b. is a furnace covered in condensation c. is more efficient than conventional furnaces and uses a secondary heat exchanger a. 3 CORRECT ANSWER A crawlspace should have one vent at least ______ feet from the corner. a. 3 b. 2 c. 4 d. 1-1/2 a. effective resistance of the wire is