WorksheetsRefrigeration Tubing Quiz
Total questions: 50
Worksheet time: 25mins
What type of tubing is commonly used in refrigeration systems?
Copper
PVC
Steel
Galvanized
What is the primary use of ACR copper tubing?
Water supply
Refrigerant circulation
Drainage
Gas lines
Which type of pipe is primarily used for gas lines?
Black pipe
PVC
Copper
ABS
How should soft copper tubing be connected?
Threaded connections
Brazing and soldering
Flare fittings
Compression fittings
What should you do before brazing copper tubing?
Purge the system
Solder the joints
Use a hacksaw
Anneal the tubing
What is the correct wall thickness for tubing used in severe corrosion conditions?
K
L
M
N
Which type of pipe is resistant to corrosion?
Galvanized
Stainless steel
Plastic
Aluminum
What is the melting temperature for brazing filler materials?
Above 840°F
Below 840°F
500°F
1000°F
Which tool is used to form a double flare?
Swaging tool
Flaring tool with adapter
Hacksaw
Tubing cutter
What is a primary concern when cutting tubing for refrigerant systems?
Preventing contamination
Ensuring a smooth cut
Cutting squarely
All of the above
How is hard-drawn ACR tubing typically supplied?
In rolls
In 10' and 20' lengths
As threaded pipes
In flanged sections
What gas should be used to purge tubing before brazing?
Oxygen
Nitrogen
Acetylene
Carbon dioxide
What type of flame should be used when brazing?
Red flame
Blue flame
Yellow flame
Green flame
How should tubing be handled to avoid contamination during cutting?
Wear gloves
Cover the ends
Use a cutting lubricant
Heat the tubing first
What is the primary function of a flare fitting?
To join pipes
To allow refrigerant to circulate
To create a leak-proof seal
To protect from corrosion
Which type of solder is commonly used for water pipes?
Tin-lead
Silver
95/5 tin-antimony
Flux
How do you prevent a tubing bend from crimping?
Use a bending spring
Heat the tubing
Cut the tubing
Use soft tubing
What should you wear during brazing?
Eye protection with a No. 4 filter lens
Standard safety glasses
Welding mask
No protection is required
What is the best way to clean tubing before soldering or brazing?
Use emery cloth
Wipe with a wet rag
Use soap and water
Polish with sandpaper
What happens if phosgene gas forms?
It poses a serious safety risk
It enhances the refrigerant system
It can be ignored
It should be burned off immediately
How is soft copper tubing typically sold?
In straight sections
In rolls
In coils
Pre-bent
What type of tubing is often used for evaporators?
Aluminum
Copper
PVC
Stainless steel
What should be avoided when handling refrigerant tubing?
Brazing with too much heat
Excessive bending
Using the wrong fittings
All of the above
Which of the following is NOT a type of copper tubing?
Hard-drawn
ACR
Galvanized
Soft
What is a primary benefit of stainless steel tubing?
Resistant to corrosion
Flexible
Easy to cut
High conductivity
How is plastic pipe typically joined?
Threaded connections
Solvent welding
Brazing
Flare fittings
What is the main characteristic of Schedule 80 plastic pipe?
Thick walls
Thin walls
Cannot be welded
Cannot be used for water lines
What is the purpose of annealing copper tubing?
To soften the tubing
To clean the tubing
To prevent corrosion
To remove burrs
What tool is used to align a cut tubing edge?
Reamer
Bender
Swager
Flaring tool
What is used to remove burrs from the inside of tubing?
Reamer
Cutter
File
Bender
What is used to create a square end on tubing?
Hacksaw
Reamer
File
Tubing cutter
What should be done when brazing to avoid leaks?
Follow proper brazing procedures
Use only soft copper tubing
Apply more heat than necessary
Use water to cool the joints quickly
What type of flame is recommended for brazing with oxyacetylene equipment?
Neutral flame
Carburizing flame
Oxidizing flame
Yellow flame
What is the key factor in preventing tubing from becoming work-hardened?
Annealing
Heating rapidly
Repeated bending
Using heavy-duty cutters
What is one advantage of hard-drawn ACR tubing over soft tubing?
Fewer clamps required
Easier to bend
Higher flexibility
Lower cost
Why should phosgene gas exposure be minimized?
It is toxic
It increases system efficiency
It damages tubing
It is required for refrigerant flow
What is the primary use for galvanized pipe in HVAC systems?
Water lines
Refrigerant lines
Drain lines
Gas lines
What is the benefit of using an oxyacetylene torch for brazing?
Hot flame for quick brazing
Lower cost than other methods
Requires less gas
Eliminates the need for nitrogen
What material is commonly used for soldering HVACR pipes?
Tin-lead solder
Flux only
Silver brazing rods
Aluminum wire
Which pipe material is NOT used in refrigerant systems?
Copper
Steel
PVC
Aluminum
What is a characteristic of black pipe?
Primarily used for gas lines
Resistant to corrosion
Used for water supply lines
Non-metallic
Which tool is ideal for bending hard-drawn copper tubing?
Lever-type tubing bender
Flaring tool
Hacksaw
Tubing cutter
What is a key safety concern when soldering?
Wearing eye protection
Using a propane torch
Overheating the metal
Allowing the flame to touch the pipe
What is one disadvantage of soft ACR tubing?
It may become work-hardened
It requires frequent maintenance
It cannot be annealed
It is difficult to cut
What is the advantage of using nitrogen for purging during brazing?
Removes air, vapors, and moisture
Makes joints stronger
Increases brazing temperature
Helps solder flow smoothly
What type of pipe is commonly used in drains and vents?
ABS
Galvanized
Steel
Copper
Which tool should you use to cut larger hard-drawn copper tubing?
Hacksaw
Pipe cutter
Tubing cutter
Reamer
What should you avoid doing when cutting tubing?
Allowing filings or chips to enter the tubing
Using too much pressure on the cutter
Measuring the tubing too precisely
Cleaning the cut ends
Which type of tubing requires annealing after work hardening?
Soft copper tubing
Steel tubing
Galvanized tubing
PVC tubing
What type of connection is typically used for steel pipe?
Threaded connections
Flared connections
Compression fittings
Brazed connections
