NATE Industry Competency Exam: Air Distribution Questions And Answers

NATE Industry Competency Exam: Air Distribution Cross breaking sheet metal duct will: a. Weaken the duct and prevent contamination. b. Stiffen the duct and reduce noise. c. Increase the cost of the duct and prevent joint splitting. d. Improve the appearance of the duct and prevent zinc cracking. - B Which of the following is one of the most common disadvantages of using flex duct in comparison to sheet metal duct? a. Less pressure drop. b. More fittings required. c. More pressure drop. d. Increased installation time. - C The tool most commonly used to cut circles in sheet metal is the: a. Notcher. b. Aviation snip. c. Bulldog snip. d. Crimper. - B The purpose of using a flexible duct connector between the air handler and the sheet metal duct is to: a. Simplify the installation of a central air handler and ductwork system. b. Eliminate the transmission of vibrations from the air handler to ductwork. c. Provide a convenient site for obtaining temperature and static pressure readings. d. Provide a leak proof connection. - B Which instrument can be used to check the velocity of air through a register