Accounting /Unit 38 HVAC Basics: Ductwork, Fasteners, and System Operation
Unit 38 HVAC Basics: Ductwork, Fasteners, and System Operation
This deck covers essential questions and answers related to HVAC systems, focusing on ductwork, fasteners, and system operation. It is designed to help students understand key concepts and practices in HVAC installation and maintenance.
One drawback of using custom made duct
All of the above
Tap or swipe ↕ to flip
Swipe ←→Navigate
SSpeak
FFocus
1/32
Key Terms
Term
Definition
One drawback of using custom made duct
All of the above
What fasteners are used with sheet metal
S fasteners & drive clips
What fasteners are commonly used with round flex duct
Self tapping screws
A good way to fasten acoustical lining to the inside of sheet metal duct is to use
Tabs & adhesives
What two fasteners are used with fiberglass ductboard
Staples & tape
____ used at the end of a metal duct run will help reduce any noise
Flexible duct
Related Flashcard Decks
Study Tips
- Press F to enter focus mode for distraction-free studying
- Review cards regularly to improve retention
- Try to recall the answer before flipping the card
- Share this deck with friends to study together
Term | Definition |
---|---|
One drawback of using custom made duct | All of the above |
What fasteners are used with sheet metal | S fasteners & drive clips |
What fasteners are commonly used with round flex duct | Self tapping screws |
A good way to fasten acoustical lining to the inside of sheet metal duct is to use | Tabs & adhesives |
What two fasteners are used with fiberglass ductboard | Staples & tape |
____ used at the end of a metal duct run will help reduce any noise | Flexible duct |
A boot in a duct system is a fitting used | Between the branch duct & the supply register |
A trap in the condensate line prevents | Air from being drawn up into the unit from the end of the drain |
An auxiliary drain pan under the ... | Above the conditioned space |
After refrigerant lines have been installed, they should be evacuated to a ___ vacuum | Deep |
One purpose of a flex is to reduce the transmission | True |
Application of acoustical lining to the interior... | True |
Power to the control transformer... | False |
When hanging a horizontal air handler, it should be pitched toward the drain port ... | False |
The Sun shining on the panels& coils of the condenser... | True |
When installing a split air conditioning system with the remote condensing unit | True |
When removing the rubber plugs from a line set the hiss indicates | True |
When the length of Quick Connect pre-charged line set is altered | False |
Once the power has been connected to the condenser unit of a package air conditioner | False |
A fitting used to change the size of a square or rectangular duct is called | Transition |
A round to rectangular fitting is called a | A square to round transition |
A split central air conditioning system is installed with the control | Air handler |
The typical gauge wire that is used in low voltage control circuits is | 18 |
Before a system is evacuated all piping should be filled with nitrogen | Leak checked |
What materials are normally used in air conditioning duct system | All metal square or rectangular duct, all metal round duct, fiberglass duct board, and flexible duct |
If a duct system has large leaks at the connections, what can be used to seal them up? | Mastic |
Even though the cooling wire runs from the thermostat to the air handler, it actually just continues on to the condensing unit. Why isn't the cooling wire | If this was done a third set of wires would be need to run. Be by using the air handler as a junction box only two sets of wires need to be run |
The line voltage for a system is normally installed by whom | A licensed electrician technician |
Explain service accessibility | A tech should be able to see and touch the work at the same time |
How much does sunshine affect the operation of a condensing unit | It lowers its efficiency, but the difference is not crucial |
What does a technician do before altering a pre-charged line set? | Recover the refrigerant from the line set |
Why is it necessary that the crankcase heater heats the compressor crankcase before starting the compressor? | To boil out any liquid refrigerant present in the crankcase. Otherwise, some of the liquid will react to the compressor cylinders and may cause damage |