CSLB C20 Trade Tougher Questions and Answers 2025/2026
CSLB C20 Trade Tougher Questions and Answers 2025/2026 Duct systems should be installed according to ____ Standards - answer-SMACNA The type of flue pipe used on gas 80% standard furnace venting systems serving gas fired systems - answer-Type B-Vent Which type of gauge would you use for very high vacuums? - answer-McLeod type gauge How many BTUs are equal to one kilowatt hour - answer-3,414 BTU When adjusting gas fired furnaces above 2000 feet, the BTU per hour input should be reduced 4% for each _____ feet above sea level. - answer-4% for every 1,000 feet How are residential furnace blower motors classified - answer-by starting method What is the equation for determining heat loss through a material - answer-Q = U times A times TD
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cslb c20 trade tougher questions and answers 2025
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