CSLB C20 Trade Tougher Questions | 100% Correct Answers

Duct systems should be installed according to ____ Standards - SMACNA The type of flue pipe used on gas 80% standard furnace venting systems serving gas fired systems - Type B-Vent Which type of gauge would you use for very high vacuums? - McLeod type gauge How many BTUs are equal to one kilowatt hour - 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. - 4% for every 1,000 feet How are residential furnace blower motors classified - by starting method What is the equation for determining heat loss through a material - Q = U times A times TD What is the overfire rating on a small draft hood - 0.02 inches what is the equation for determining minimum size air supply for a blower type furnace - 2 divided by 1000 times the BTU of the furnace what is the equation for determining minimum size air supply for a gravity type furnace - 7 divided by 1000 times the BTU of the gravity furnace the type of bub that measures evaporative cooling - wet bulb the heating value of natural gas is - 1100 BTU per cubic foot Silver solder starts to flow at or above - 1150 degrees fahrenheit