When is insulation required on air ducts?
What will be an ideal response?
if the air temperature is 15°F different from the air in the duct
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What is commonly wrong when the heat from a heater "comes and goes"?
A) Cooling system is low on coolant B) A coolant restriction C) Incorrect heater hoses D) A worn water pump drive belt
The ____ used with poured- in-place concrete floor systems contain a plan view of the floor, sections showing precise placement of the reinforcement bars, a slab schedule, and a bar details schedule
A. engineering drawings B. slab drawings C. placing drawings D. floor grid drawings
The condensate drain on a rooftop unit:
A) Does not require a trap because of the short distance. B) Does not require any type of drain line. C) Must include a trap unless the unit has an integral trap. D) Is normally run through the curb to an inside drain connection.
The ductwork connections for a rooftop packaged unit are typically
A) on the side of the unit B) not used because they do not connect to ductwork C) on the top of the unit D) on the bottom of the unit